Leica Summilux-M 28mm f/1.7 Asph lens
When a lens is fixed it is important that it is a good match for the camera, and although some may question the decision to opt for 28mm rather than 35mm, I found that I was able to get a variety of images without feeling too compromised.
The lens is constructed of 11 elements in nine groups, with three of the elements being aspherical. As you would expect from Leica, the lens feels good in the hand, with a reassuringly level of torque on both the aperture and manual-focus rings.
The 28mm f/1.7 lens is extremely sharp, especially when shooting between f/5.6 and f/8. Sharpness starts to drop at f/11, with diffraction becoming obvious at the smallest aperture of f/16. When shooting wide open, images are still acceptably sharp and out-of-focus areas are smoothly rendered. There was some slight curvilinear distortion, although this is largely corrected in both JPEG and raw images so is not an issue.
