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Low-dispersion glass
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Low-dispersion glass is a type of glass with reduced chromatic aberration, meaning the refractive index does not change as strongly with different wavelengths of light. In other words, the light passi
Chromatic aberration from inadequate correction to converge different wavelengths, giving a "rainbow effect" at high-contrast edges.
Chromatic aberration from inadequate correction to converge different wavelengths, giving a "rainbow effect" at high-contrast edges.
High-performance telephoto lenses often incorporate LD glass elements.
High-performance telephoto lenses often incorporate LD glass elements.
Kodak Aero-Ektar fitted to K-19B camera for aerial reconnaissance, with puppy
Kodak Aero-Ektar fitted to K-19B camera for aerial reconnaissance, with puppy
Sigma 300–800mm f/5.6 EX DG HSM lens
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The Sigma 300 – 800 mm lens is a professional-level supertelephoto zoom lens made by Sigma Corporation from 2002 to 2019 for use with analog and digital SLRs. Due to its massive size and weight, the l
Sigma 300–800mm f/5.6 EX DG HSM lens