1.
United States dollar
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The United States dollar is the official currency of the United States and its insular territories per the United States Constitution. It is divided into 100 smaller cent units, the circulating paper money consists of Federal Reserve Notes that are denominated in United States dollars. The U. S. dollar was originally commodity money of silver as enacted by the Coinage Act of 1792 which determined the dollar to be 371 4/16 grain pure or 416 grain standard silver, the currency most used in international transactions, it is the worlds primary reserve currency. Several countries use it as their currency, and in many others it is the de facto currency. Besides the United States, it is used as the sole currency in two British Overseas Territories in the Caribbean, the British Virgin Islands and Turks and Caicos Islands. A few countries use the Federal Reserve Notes for paper money, while the country mints its own coins, or also accepts U. S. coins that can be used as payment in U. S. dollars. After Nixon shock of 1971, USD became fiat currency, Article I, Section 8 of the U. S. Constitution provides that the Congress has the power To coin money, laws implementing this power are currently codified at 31 U. S. C. Section 5112 prescribes the forms in which the United States dollars should be issued and these coins are both designated in Section 5112 as legal tender in payment of debts. The Sacagawea dollar is one example of the copper alloy dollar, the pure silver dollar is known as the American Silver Eagle. Section 5112 also provides for the minting and issuance of other coins and these other coins are more fully described in Coins of the United States dollar. The Constitution provides that a regular Statement and Account of the Receipts and that provision of the Constitution is made specific by Section 331 of Title 31 of the United States Code. The sums of money reported in the Statements are currently being expressed in U. S. dollars, the U. S. dollar may therefore be described as the unit of account of the United States. The word dollar is one of the words in the first paragraph of Section 9 of Article I of the Constitution, there, dollars is a reference to the Spanish milled dollar, a coin that had a monetary value of 8 Spanish units of currency, or reales. In 1792 the U. S. Congress passed a Coinage Act, Section 20 of the act provided, That the money of account of the United States shall be expressed in dollars, or units. And that all accounts in the offices and all proceedings in the courts of the United States shall be kept and had in conformity to this regulation. In other words, this act designated the United States dollar as the unit of currency of the United States, unlike the Spanish milled dollar the U. S. dollar is based upon a decimal system of values. Both one-dollar coins and notes are produced today, although the form is significantly more common
2.
Ulysses S. Grant
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Ulysses S. Grant was the 18th President of the United States. As Commanding General, Grant worked closely with President Abraham Lincoln to lead the Union Army to victory over the Confederacy in the American Civil War and he implemented Congressional Reconstruction, often at odds with President Andrew Johnson. His presidency has often criticized for tolerating corruption and for the severe economic depression in his second term. Grant graduated in 1843 from the United States Military Academy at West Point, after the war he married Julia Boggs Dent in 1848, their marriage producing four children. Grant initially retired from the Army in 1854 and he struggled financially in civilian life. When the Civil War began in 1861, he rejoined the U. S. Army, in 1862, Grant took control of Kentucky and most of Tennessee, and led Union forces to victory in the Battle of Shiloh, earning a reputation as an aggressive commander. He incorporated displaced African American slaves into the Union war effort, in July 1863, after a series of coordinated battles, Grant defeated Confederate armies and seized Vicksburg, giving the Union control of the Mississippi River and dividing the Confederacy in two. After his victories in the Chattanooga Campaign, Lincoln promoted him to lieutenant general, Grant confronted Robert E. Lee in a series of bloody battles, trapping Lees army in their defense of Richmond. Grant coordinated a series of devastating campaigns in other theaters, as well, in April 1865, Lee surrendered to Grant at Appomattox, effectively ending the war. Historians have hailed Grants military genius, and his strategies are featured in history textbooks. After the Civil War, Grant led the armys supervision of Reconstruction in the former Confederate states and he also used the army to build the Republican Party in the South. After the disenfranchisement of some former Confederates, Republicans gained majorities, in his second term, the Republican coalitions in the South splintered and were defeated one by one as redeemers regained control using coercion and violence. In May 1875, Grant authorized his Secretary of Treasury Benjamin Bristow to shut down and his peace policy with the Indians initially reduced frontier violence, but is best known for the Great Sioux War of 1876. Grant responded to charges of corruption in executive offices more than any other 19th Century president and he appointed the first Civil Service Commission and signed legislation ending the corrupt moiety system. In foreign policy, Grant sought to trade and influence while remaining at peace with the world. His administration successfully resolved the Alabama claims by the Treaty of Washington with Great Britain, Grant avoided war with Spain over the Virginius Affair, but Congress rejected his attempted annexation of the Dominican Republic. His administration implemented a standard and sought to strengthen the dollar. Grant left office in 1877 and embarked on a two-year diplomatic world tour that captured the nations attention, in 1880, Grant was unsuccessful in obtaining the Republican presidential nomination for a third term
3.
United States Capitol
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The United States Capitol, often called the Capitol Building or Capitol Hill, is the home of the United States Congress, and the seat of the legislative branch of the U. S. federal government. It sits atop Capitol Hill at the end of the National Mall in Washington. Though not at the center of the Federal District, the Capitol forms the origin point for the Districts street-numbering system. The original building was completed in 1800 and was subsequently expanded, like the principal buildings of the executive and judicial branches, the Capitol is built in a distinctive neoclassical style and has a white exterior. Both its east and west elevations are referred to as fronts, though only the east front was intended for the reception of visitors. In 2014, scaffolding was erected around the dome for a project scheduled to be completed by early 2017. All exterior scaffolding was removed by the end of summer 2016, prior to establishing the nations capital in Washington, D. C. the United States Congress and its predecessors had met in Philadelphia, New York City, and a number of other locations. In September 1774, the First Continental Congress brought together delegates from the colonies in Philadelphia, followed by the Second Continental Congress, Congress requested that John Dickinson, the Governor of Pennsylvania, call up the militia to defend Congress from attacks by the protesters. In what became known as the Pennsylvania Mutiny of 1783, Dickinson sympathized with the protesters and refused to remove them from Philadelphia. As a result, Congress was forced to flee to Princeton, New Jersey, on June 21,1783, and met in Annapolis, Maryland, the United States Congress was established upon ratification of the United States Constitution and formally began on March 4,1789. New York City remained home to Congress until July 1790, when the Residence Act was passed to pave the way for a permanent capital. As part of the legislation, Philadelphia was chosen as a capital for ten years, until the nations capital in Washington. Pierre Charles LEnfant was given the task of creating the city plan for the new capital city, in reviewing LEnfants plan, Thomas Jefferson insisted the legislative building be called the Capitol rather than Congress House. The word Capitol comes from Latin and is associated with the Temple of Jupiter Optimus Maximus on Capitoline Hill, the connection between the two is not, however, crystal clear. In spring 1792, United States Secretary of State Thomas Jefferson proposed a competition to solicit designs for the Capitol and the Presidents House. The prize for the competition was $500 and a lot in the Federal City, the most promising of the submissions was by Stephen Hallet, a trained French architect. However, Hallets designs were overly fancy, with too much French influence, a late entry by amateur architect William Thornton was submitted on January 31,1793, to much praise for its Grandeur, Simplicity, and Beauty by Washington, along with praise from Thomas Jefferson. Thornton was inspired by the east front of the Louvre, as well as the Paris Pantheon for the portion of the design
4.
United States Note
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A United States Note, also known as a Legal Tender Note, is a type of paper money that was issued from 1862 to 1971 in the U. S. Having been current for more than 100 years, they were issued for longer than any form of U. S. paper money. They were known popularly as greenbacks, a name inherited from the earlier greenbacks, the Demand Notes, often termed Legal Tender Notes, they were named United States Notes by the First Legal Tender Act, which authorized them as a form of fiat currency. They were originally issued directly into circulation by the U. S. Treasury to pay expenses incurred by the Union during the American Civil War, during the next century, the legislation governing these notes was modified many times and numerous versions were issued by the Treasury. S. Treasury Seals and serial numbers in place of green ones, existing United States Notes remain valid currency in the United States, however, as no United States Notes have been issued since January 1971, they are increasingly rare in circulation. The Act of July 17,1861 authorized United States Secretary of the Treasury Salmon P. Chase to raise money via the issuance of $50,000,000 in Treasury Notes payable on demand. These Demand Notes were paid to creditors directly and used to meet the payroll of soldiers in the field. While issued within the framework of Treasury Note Debt, the Demand Notes were intended to circulate as currency and were of the same size as banknotes. During December 1861, economic conditions deteriorated and a suspension of specie payment caused the government to cease redeeming the Demand Notes as coins, the beginning of 1862 found the Unions expenses increasing, and the government was having trouble funding the escalating war. Demand Notes—which were used, among other things, to pay Union soldiers—were unredeemable, congressman and Buffalo banker Elbridge G. Spaulding prepared a bill, based on the Free Banking Law of New York, that eventually became the National Banking Act of 1863. This caused tremendous controversy in Congress, as hitherto the Constitution had been interpreted as not granting the government the power to issue a paper currency. Spaulding justified the action as a means of carrying into execution the powers granted in the Constitution to raise and support armies. Initially, the emission was limited to $150,000,000 total face value between the new Legal Tender Notes and the existing Demand Notes, the Act also intended for the new notes to be used to replace the Demand Notes as soon as practical. The Demand Notes had been issued in denominations of $5, $10, and $20, in addition, notes of entirely new design were introduced in denominations of $50, $100, $500 and $1000. The Demand Notes printed promise of payment On Demand was removed, Legal tender status guaranteed that creditors would have to accept the notes despite the fact that they were not backed by gold, bank deposits, or government reserves, and had no interest. The Act did provide that the notes be receivable by the government for short term deposits at 5% interest, the rationale for these terms was that the Union government would preserve its credit-worthiness by supporting the value of its bonds by paying their interest in gold. Lastly, by making the bonds available for purchase at par in United States Notes, the limitations of the legal tender status were quite controversial. This controversy would continue until the removal of the exceptions during 1933, the largest amount of greenbacks outstanding at any one time was calculated as $447,300,203.10
5.
Benjamin Franklin
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Benjamin Franklin was one of the Founding Fathers of the United States. Franklin was a polymath and a leading author, printer, political theorist, politician, freemason, postmaster, scientist, inventor, civic activist, statesman. As a scientist, he was a figure in the American Enlightenment. As an inventor, he is known for the rod, bifocals. He facilitated many civic organizations, including Philadelphias fire department and the University of Pennsylvania, Franklin earned the title of The First American for his early and indefatigable campaigning for colonial unity, initially as an author and spokesman in London for several colonies. As the first United States Ambassador to France, he exemplified the emerging American nation, in the words of historian Henry Steele Commager, In a Franklin could be merged the virtues of Puritanism without its defects, the illumination of the Enlightenment without its heat. To Walter Isaacson, this makes Franklin the most accomplished American of his age, Franklin became a successful newspaper editor and printer in Philadelphia, the leading city in the colonies, publishing the Pennsylvania Gazette at the age of 23. He became wealthy publishing this and Poor Richards Almanack, which he authored under the pseudonym Richard Saunders, after 1767, he was associated with the Pennsylvania Chronicle, a newspaper that was known for its revolutionary sentiments and criticisms of the British policies. He pioneered and was first president of The Academy and College of Philadelphia which opened in 1751 and he organized and was the first secretary of the American Philosophical Society and was elected president in 1769. Franklin became a hero in America as an agent for several colonies when he spearheaded an effort in London to have the Parliament of Great Britain repeal the unpopular Stamp Act. An accomplished diplomat, he was widely admired among the French as American minister to Paris and was a figure in the development of positive Franco-American relations. His efforts proved vital for the American Revolution in securing shipments of crucial munitions from France, during the Revolution, he became the first US Postmaster General. He was active in community affairs and colonial and state politics, from 1785 to 1788, he served as governor of Pennsylvania. He initially owned and dealt in slaves but, by the 1750s, he argued against slavery from an economic perspective, Franklins father, Josiah Franklin, was a tallow chandler, a soap-maker and a candle-maker. Josiah was born at Ecton, Northamptonshire, England on December 23,1657, the son of Thomas Franklin, a blacksmith-farmer, and Jane White. His mother, Abiah Folger, was born in Nantucket, Massachusetts, on August 15,1667, to Peter Folger, a miller and schoolteacher, and his wife, Mary Morrill, Josiah Franklin had seventeen children with his two wives. He married his first wife, Anne Child, in about 1677 in Ecton and emigrated with her to Boston in 1683, after her death, Josiah was married to Abiah Folger on July 9,1689 in the Old South Meeting House by Samuel Willard. Benjamin, their child, was Josiah Franklins fifteenth child and tenth
6.
President of the United States
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The President of the United States is the head of state and head of government of the United States. The president directs the executive branch of the government and is the commander-in-chief of the United States Armed Forces. The president is considered to be one of the worlds most powerful political figures, the role includes being the commander-in-chief of the worlds most expensive military with the second largest nuclear arsenal and leading the nation with the largest economy by nominal GDP. The office of President holds significant hard and soft power both in the United States and abroad, Constitution vests the executive power of the United States in the president. The president is empowered to grant federal pardons and reprieves. The president is responsible for dictating the legislative agenda of the party to which the president is a member. The president also directs the foreign and domestic policy of the United States, since the office of President was established in 1789, its power has grown substantially, as has the power of the federal government as a whole. However, nine vice presidents have assumed the presidency without having elected to the office. The Twenty-second Amendment prohibits anyone from being elected president for a third term, in all,44 individuals have served 45 presidencies spanning 57 full four-year terms. On January 20,2017, Donald Trump was sworn in as the 45th, in 1776, the Thirteen Colonies, acting through the Second Continental Congress, declared political independence from Great Britain during the American Revolution. The new states, though independent of each other as nation states, desiring to avoid anything that remotely resembled a monarchy, Congress negotiated the Articles of Confederation to establish a weak alliance between the states. Out from under any monarchy, the states assigned some formerly royal prerogatives to Congress, only after all the states agreed to a resolution settling competing western land claims did the Articles take effect on March 1,1781, when Maryland became the final state to ratify them. In 1783, the Treaty of Paris secured independence for each of the former colonies, with peace at hand, the states each turned toward their own internal affairs. Prospects for the convention appeared bleak until James Madison and Edmund Randolph succeeded in securing George Washingtons attendance to Philadelphia as a delegate for Virginia. It was through the negotiations at Philadelphia that the presidency framed in the U. S. The first power the Constitution confers upon the president is the veto, the Presentment Clause requires any bill passed by Congress to be presented to the president before it can become law. Once the legislation has been presented, the president has three options, Sign the legislation, the bill becomes law. Veto the legislation and return it to Congress, expressing any objections, in this instance, the president neither signs nor vetoes the legislation
7.
Obverse and reverse
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In this usage, obverse means the front face of the object and reverse means the back face. The obverse of a coin is commonly called heads, because it depicts the head of a prominent person. In fields of scholarship outside numismatics, the front is more commonly used than obverse. For prints and drawings with material on both sides the one judged as more significant will be the recto, a convention now exists typically to display the obverse to the left and the reverse to the right in photographs and museum displays, but this is not invariably observed. Following this principle, in the most famous of ancient Greek coins, the tetradrachm of Athens, the obverse is the head of Athena, similar versions of these two images, both symbols of the state, were used on the Athenian coins for more than two centuries. The opposite side may have varied from time to time and this change happened in the coinage of Alexander the Great, which continued to be minted long after his death. The various Hellenistic rulers who were his successors followed his tradition and this script alone style then was used on nearly all Islamic coinage until the modern period. The type of Justinian II was revived after the end of Iconoclasm, without images, therefore, it is not always easy to tell which side will be regarded as the obverse without some knowledge. After 695, Islamic coins avoided all images of persons and usually, the side expressing the Six Kalimas is usually defined as the obverse. The form of currency follows its function, which is to serve as an accepted medium of exchange of value. Traditionally, most states have been monarchies where the person of the monarch, if not provided for on the obverse, the reverse side usually contains information relating to a coins role as medium of exchange. Additional space typically reflects the countrys culture or government, or evokes some aspect of the states territory. Regarding the euro, some regarding the obverse and reverse of the euro coins exists. This rule does not apply to the coins as they dont have a common side. A number of the used for obverse national sides of euro coins were taken from the reverse of the old pre-euro coins of some individual countries. Several countries continue to use portraits of the monarch and the Republic of Ireland continues to use the State Arms. The Chrysanthemum Crest was no longer used after the war, and so, the side on which the date continues to be regarded as the reverse. Following ancient tradition, the obverse of coins of the United Kingdom almost always feature the head of the monarch
8.
Federal Reserve Note
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Federal Reserve Notes, also United States banknotes or U. S. banknotes, are the banknotes currently used in the United States of America. Denominated in United States dollars, Federal Reserve Notes are printed by the United States Bureau of Engraving and Printing on paper made by Crane & Co. of Dalton, Federal Reserve Notes are the only type of U. S. banknote currently produced. The notes are then put into circulation by the Federal Reserve Banks, at which point they become liabilities of the Federal Reserve Banks, Federal Reserve Notes are legal tender, with the words this note is legal tender for all debts, public and private printed on each note. They have replaced United States Notes, which were issued by the Treasury Department. Federal Reserve Notes are backed by the assets of the Federal Reserve Banks and these assets are generally Treasury securities which have been purchased by the Federal Reserve through its Federal Open Market Committee in a process called debt monetizing. This monetized debt can increase the supply, either with the issuance of new Federal Reserve Notes or with the creation of debt money. This increase in the base leads to a larger increase in the money supply through fractional-reserve banking as deposits are lent. Prior to centralized banking, each bank issued its own notes. The first institution with responsibilities of a bank in the U. S. was the First Bank of the United States. Its charter was not renewed in 1811, in 1816, the Second Bank of the United States was chartered, its charter was not renewed in 1836, after President Andrew Jackson campaigned heavily for its disestablishment. From 1837 to 1862, in the Free Banking Era there was no central bank. From 1862 to 1913, a system of banks was instituted by the 1863 National Banking Act. The first printed notes were Series 1914, in 1928, cost-cutting measures were taken to reduce the note to the size it is today. The authority of the Federal Reserve Banks to issue notes comes from the Federal Reserve Act of 1913, legally, they are liabilities of the Federal Reserve Banks and obligations of the United States government. Although not issued by the Treasury Department, Federal Reserve Notes carry the signature of the Treasurer of the United States, at the time of the Federal Reserves creation, the law provided for notes to be redeemed to the Treasury in gold or lawful money. The Emergency Banking Act of 1933 removed the gold obligation and authorized the Treasury to satisfy these redemption demands with current notes of equal face value, under the Bretton Woods system, although citizens could not possess gold, the federal government continued to maintain a stable international gold price. This system ended with the Nixon Shock of 1971, present-day Federal Reserve Notes are not backed by convertibility to any specific commodity, but only by the collateral assets that Federal Reserve Banks post in order to obtain them. Series 1914 FRN were the first of two large-size issues, denominations were $5, $10, $20, $50, and $100 printed first with a red seal and then continued with a blue seal
9.
Interest bearing note
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Interest bearing notes refers to a grouping of Civil War era paper money-related emissions of the US Treasury.3 percent—though both of these latter issues lacked legal tender status. Reference texts used by currency collectors will sometimes include compound interest treasury notes. Images are courtesy of the National Numismatic Collection at the National Museum of American History, Friedberg, Arthur L. Friedberg, Ira S. Paper Money of the United States, A Complete Illustrated Guide With Valuations, the Engraver’s Line – An Encyclopedia of Paper Money & Postage Stamp Art. U. S. Essay, Proof and Specimen Notes
10.
Treasury Note (19th century)
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A Treasury Note is a type of short term debt instrument issued by the United States prior to the creation of the Federal Reserve System in 1913. While the Treasury Notes, as issued, were legal tender nor representative money. However the motivation behind their issuance was always funding federal expenditures rather than the provision of a circulating medium. Often they were receivable at face value by the government in payment of taxes and for purchases of publicly owned land, and thus might to some extent be regarded as paper money. On many issues the interest rate was chosen to make interest calculations particularly easy, paying either 1, 1½, today the Treasurys short term debt needs are fulfilled by Treasury bills. The early finances of the government of the United States were precarious. To help finance the American Revolution the Continental Congress had issued Continental Dollars between 1775 and 1779, as part of the Compromise of 1790, the Continental Dollars were redeemed at a loss of over 99% vs. As a result, Americas early creditors had reason to be wary of a paper currency, the Founding Fathers were divided over whether the United States needed a central bank similar to the Bank of England to issue currency and facilitate the governments use of credit. Having thus set the precedent, the Treasury would go on to issue such notes up through the Civil War. Several issues of Treasury Notes were made during the War of 1812 from 1812 to 1815, most of these notes paid 5 2⁄5% interest, matured in one year, and were receivable in payment for public dues. While $37 million were issued, no more than $17 million were outstanding at any one time, only about $6 million of the loan was placed in the form of 6% interest bonds, and thus $5 million of Notes were issued. The Notes were made receivable for all public dues owed the federal government, a further $5 million of similar Notes were authorized on February 25,1813 to supplement additional loans which had not been fully subscribed. Only Notes of $100 denomination and greater were issued under these first two acts, and they sold at close to par. The next two acts, those of March 4,1814 and Dec 26,1814, called for Note issues both to raise revenue as well as to substitute for unsubscribed loans. A total of $18,318,400 were emitted under these acts which included Notes of $20, during 1814 federal finances deteriorated as the war dragged on, and banks outside New England suspended specie payment on August 31,1814. The value of the Treasury Notes fell below that of specie and these developments led to changes in the final Treasury Note act of the era signed on February 24,1815. These last notes were divided into large and small denominations, the large notes paid interest as before, at 5 2⁄5% per annum, but could also be used to purchase 6 percent interest bonds at par as a way of supporting their value. The Act had been drafted during the financial disarray late in the War of 1812, the issued denominations were as low as $3, their size was typical of banknotes and, unlike the previously issued Notes, they were payable to bearer rather than to order
11.
Bald eagle
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The bald eagle is a bird of prey found in North America. A sea eagle, it has two subspecies and forms a species pair with the white-tailed eagle. Its range includes most of Canada and Alaska, all of the contiguous United States and it is found near large bodies of open water with an abundant food supply and old-growth trees for nesting. The bald eagle is a feeder which subsists mainly on fish. It builds the largest nest of any North American bird and the largest tree nests ever recorded for any species, up to 4 m deep,2.5 m wide. Sexual maturity is attained at the age of four to five years, Bald eagles are not actually bald, the name derives from an older meaning of the word, white headed. The adult is brown with a white head and tail. The sexes are identical in plumage, but females are about 25 percent larger than males, the beak is large and hooked. The plumage of the immature is brown, the bald eagle is both the national bird and national animal of the United States of America. The bald eagle appears on its seal, in the late 20th century it was on the brink of extirpation in the contiguous United States. Populations have since recovered and the species was removed from the U. S. governments list of endangered species on July 12,1995 and it was removed from the List of Endangered and Threatened Wildlife in the Lower 48 States on June 28,2007. The plumage of an bald eagle is evenly dark brown with a white head. The tail is long and slightly wedge-shaped. Males and females are identical in coloration, but sexual dimorphism is evident in the species. The beak, feet and irises are bright yellow, the legs are feather-free, and the toes are short and powerful with large talons. The highly developed talon of the toe is used to pierce the vital areas of prey while it is held immobile by the front toes. The beak is large and hooked, with a yellow cere, the adult bald eagle is unmistakable in its native range. The closely related African fish eagle also has a body, white head and tail
12.
Vignetting
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In photography and optics, vignetting is a reduction of an images brightness or saturation at the periphery compared to the image center. The word vignette, from the root as vine, originally referred to a decorative border in a book. Later, the word came to be used for a portrait which is clear in the center. A similar effect occurs when photographing projected images or movies off a projection screen, vignetting is often an unintended and undesired effect caused by camera settings or lens limitations. However, it is deliberately introduced for creative effect, such as to draw attention to the center of the frame. A photographer may deliberately choose a lens which is known to produce vignetting to obtain the effect, when using superzoom lenses, vignetting may occur all along the zoom range, depending on the aperture and the focal length. However, it may not always be visible, except at the widest end, in these cases, vignetting may cause an exposure value difference of up to 0. 75EV. There are several causes of vignetting and this has the effect of changing the entrance pupil shape as a function of angle. Darkening can be gradual or abrupt – the smaller the aperture, when some points on an image receives no light at all due to mechanical vignetting, then this results in an restriction of the field of view – parts of the image are then completely black. This type of vignetting is caused by the dimensions of a multiple element lens. Rear elements are shaded by elements in front of them, which reduces the lens opening for off-axis incident light. The result is a decrease in light intensity towards the image periphery. Optical vignetting is sensitive to the aperture and can often be cured by a reduction in aperture of 2–3 stops. Unlike the previous types, natural vignetting is not due to the blocking of light rays, the falloff is approximated by the cos4 or cosine fourth law of illumination falloff. Here, the light falloff is proportional to the power of the cosine of the angle at which the light impinges on the film or sensor array. Wideangle rangefinder designs and the designs used in compact cameras are particularly prone to natural vignetting. Telephoto lenses, retrofocus wideangle lenses used on SLR cameras, a gradual grey filter or postprocessing techniques may be used to compensate for natural vignetting, as it cannot be cured by stopping down the lens. Some modern lenses are designed so that the light strikes the image parallel or nearly so
