Flash synchronization
Videos
In photography, flash synchronization or flash sync is the synchronizing the firing of a photographic flash with the opening of the shutter admitting light to photographic film or electronic image sen
An example of improper synch. Either the flash is firing too late or the shutter speed is too fast (shutter moving vertically). Note the different exposure levels.
PC-socket
Friedrich Deckel
Videos
Friedrich Deckel GmbH, also known as F. Deckel, was a German company founded by Friedrich Deckel and Christian Bruns in Munich as Bruns & Deckel in 1903. Its most famous product is the Compur line of
Clockwork mechanism within a Compur-Rapid leaf shutter; cocking lever at upper left and tripping lever at upper right; lever below cocking lever selects aperture.
Early Compur shutters used a dial at the 12 o'clock position to set the shutter speed; later versions used a ring coaxial with the lens.
Voigtländer Ultramatic and dismounted lens
Voigtländer Super-Dynarex 135 mm f/4 lens, showing DKL-mount bayonet lugs