Leica APO-Summicron-SL 50mm f/2 (mislabelled Zeiss), reference-grade APO standard with AF for the L-Mount.
The Leica APO-Summicron-SL 50mm f/2 is a premium standard prime for the L-Mount SL system. APO = apochromatic. Note: canonical name has erroneous 'Zeiss' prefix; the APO-Summicron-SL is a Leica SL product. L-Mount.
f/2 maximum aperture. 50mm focal length (full-frame standard prime). Apochromatic. AF. Leica SL build quality. L-Mount.
The APO-Summicron-SL 50mm f/2 provides apochromatic colour correction for the L-Mount system — minimal lateral chromatic aberration at f/2 across the frame. A premium standard prime for Leica SL, Panasonic S, and Sigma FP cameras.
On the used market the Leica APO-Summicron-SL 50mm f/2 is a premium L-Mount standard. Condition checks: AF, front element. L-Mount.