The f/ stop on the camera that regulates how much light passes through the lens. ORIGIN mid 19th cent.: from a- + Greek stigma 'point' + -ism. ORIGIN late 19th cent.: from an- 1 + astigmatic (see astigmatism):Īstigmatism a defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus. Produced again as a retro camera in 2000-2002).Īnastigmatic (of a lens system) constructed so that the astigmatism of each element is canceled out.
#Leitz binoculars serial numbers serial number#
You may also look up a specific lens serial number at the French Ĭourtesy of Oxford American and See my more complete list of definitions at my article Leica DefinitionsĪnastigmat an anastigmatic lens system ( Leitz Anastigmat (Leitz I) from 1920 with a fixed 50mm f3.5 lens.
#Leitz binoculars serial numbers serial numbers#
This is the list of Leitz and Leica lens serial numbers and which year that lens was approximately produced.
You may download a free PDF version of the 2002-version of this from You may download a free PDF version of the 2002-version of theĮrwin Puts: "Leica M Lenses Their Soul and Secrets"Īvailable from Erwin Puts website, eBay or If you are looking for the Leica Lens Compendium (2001) or the Leica Compendium (2012 print edition and 2014 digital edition) by Erwin Puts, please wisit his website for more info, or try search eBay for his books (usually sold out from the publisher rather fast, so they become collectors items).
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