The Leica APO-Summicron-M 90mm f/2 ASPH. ($3,995) is a short telephoto lens for Leica M rangefinder cameras. It's quite sharp wide open, and enters into incredibly sharp territory when stopped down a bit. Its design is pretty compact when you consider its aperture and focal length, and the all-metal barrel with a convenient integrated hood is just what you'd expect from a Leica lens. Saying that it's not inexpensive is putting it lightly, but in this case you get what you pay for. If you're on a budget and want a lens in this focal range, consider the Zeiss Tele-Tessar T* 4/85 ZM ($987.00 at Amazon) . But, even at its asking price, the APO-Summicron is worthy of being called our Editors' Choice. The Summicron is finished in black anodized aluminum, measures 3.1 by 2.5 inches (HD), and weighs about 1.1 pounds. That's on the heavy side for a rangefinder lens, but positively tiny when compared with an SLR lens that delivers comparable performance, like the Zeiss Otus 1.4/85 ($4,490...
The Leica APO-Summicron-M 90mm f/2 ASPH. is a nearly flawless telephoto lens for Leica rangefinder cameras. It's sharp from edge to edge and has a wide f/2 maximum aperture.
Sharp from edge to edge; Wide aperture; No distortion; Compact; Smooth manual focus ring; Integrated lens hood
Expensive; Close focus limited to 1 meter; Lacks optical stabilization and autofocus