Sigma 55mm YS Macro Lens

Sigma 55mm YS Macro Lens

Sigma 55mm YS Macro Lens
Front

Sigma 55mm YS Macro Lens
Side

Sigma 55mm YS Macro Lens
Back

Test shot with Sigma 55mm YS
macro Lens wide open

This is a Sigma 55mm YS Macro Lens. It utilizes the YS mount. This lens has the feature of being able to accept either a 55mm or 62mm filter. The reproduction ratio is 1:1/2. This is a nice lens to have on the camera. It works well as a standard lens, plus it has the bonus feature of being able to do some great close up photography. It's also nice that this lens is a fast f/2.8. In addition, the front element is recessed to the point of not needing a lens hood. I feel this is a truly great lens.

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.