Used Leica Macro-Elmar-M 90mm f/4

The Leica Macro Elmar m 90mm f/4 lens is one of the youngest of the Leica house, but at the same time, one of the largest secrets of the company. It is the smallest and lightest 90 mm bayonet lens ever made by Leica, and is also among the 90 mm lenses of very high performance of all time. It is an extraordinary 90 mm telephoto lens for general use, which focuses directly on the Macro range without requesting tricks or adapters. It fits into a pocket and is the only 90mm to be used for any photographic need. This lens moves from infinity to a super-wear of 0.78 mm in just 120 ° of the rotation of the focus ring. Compared to the other lenses of the same category, this is the smallest, lighter, easier to focus and the most focused on short distances. The Macro Elmar M 90mm f/4 works perfectly on each Leica M camera, from the 1954 m3, Cle di Minolta and, of course, Leica M7, Leica MP and Leica M9. The optical body consists of 4 elements in 4 groups. Its physical length is lower than its focal length and the exit pupil is about 57% of the diameter of the entrance pupil. The diaphragm consists of 10 lamellae, stops at f/22 with half -run clicks. The edges are straight from f/4.7 to f/5.6 and f/16 up to f/19, while they are curved internally from f/6.7 to f/13. At f/22, on the other hand, it is perfectly round. The quality of the blurred areas compared to the degree of blur, is wonderful and the backgrounds never distract. It has a slight bearing distortion, a detail that is not known if it is not sought and also in that case it is practically imperceptible. Finally, the sharpness of this lens is surprising and demonstrates how Leica is able to produce an excellent article even with only four elements.