Sigma Telemax 135mm YS Telephoto Lens

Sigma Telemax 135mm Complete

Sigma Telemax 135mm System Focusing

Sigma Telemax 135mm Back

Sigma Telemax 135mm Front

This is a Sigma Telemax 135mm YS Telephoto Lens. It uses the YS mount. This lens has Sigma's "System Focusing". This is a secondary focusing ring that allows for close up photography. It automatically resets when the focus ring is turned to infinity. You will note the f stops in green and yellow, you should only attempt to use the "System Focusing" while in the green range. It's a neat feature, but requires a decent amount of light to achieve good results. The lens in normal focusing mode works fine. The reproduction ratio is 1:1/3. This lens also has the feature of being able to accept either a 52mm or 62mm filter.


The YS mount is basically an auto diaphragm T-mount system. It utilizes the same dimensions and thread pitch as a T-mount. The point of the YS system was to have an auto lens that could be used on any auto camera with the correct YS adapter, while allowing the retention of that camera's auto diaphragm system.