How to determine the age of a Carl Zeiss lens

Werra 2 Olive + Lightmeter

Zeiss Lens Serial Numbers Between 1912 and 1942 Year of Manufacture – Serial Number Range 1912 – 173418-200520 1913-  208473-249350 1914 – 249886-252739 1915-  282820- 1916-  Unknown 1917 – 289087-298157 1918-  298115-322748 1919 – 322799-351611 1920 – 375194-419823 1921 – 433273-438361 1922 – 422899-498006 1923 – 561270-578297 1924 – 631869- 1925 – 652230-681743 1926 – […]

Information on the Sigma Y-S mount system

sigma YS system

YS AUTOMATIC CUSTOM CAMERA FITTING FOR USE WITH YS INTERCHANGEABLE AUTOMATIC LENSES Attached find a manual for YS lens adapters (one of the less common interchangeable lens mount systems which is basically a T mount with a Pentax screw mount like stop down pin added).  This interchangeable mount system was developed by Sigma as competition to the […]

Canon Flash: Speedlite compatibility EZ vs. EX

Canon Speedlite 200E

When the first camera with evaluative autoflash metering was launched, EX-series Speedlites were introduced to make use of the E-TTL metering. These EX-series Speedlites are also compatible with TTL flash metering, so will operate with all EOS models. All the new film cameras offering E-TTL metering retain the flash sensors for A-TTL metering, so are […]