Lens system
| Fixed focal length |
90.9 mm |
| Diagonal angle of view (max) |
27 ° |
| Reproduction ratio |
1:9 |
| Closest focusing distance |
1 m |
Apo-Summicron-M 90 mm f/2
Apochromatic colour correction and an aspherical lens surface are combined for the first time in this lens of this type. Of its five individual elements, two are made of high-refraction glass, while two others feature anomalous partial dispersion. Its brilliance and quality of resolution are exemplary even at full aperture. Light falloff is very low. Its fast aperture, for a 90 mm lens, lets you shoot at relatively short exposure times even in dim light, helping to minimise the effects of camera shake, for instance when photographing street scenes from a distance.