The Macro-Elmar M 90mm f/4 Lens from Leica is the latest addition in the popular short telephoto lens range, and when combined with the dedicated Macro Adapter M, made specifically for this lens, has a reproduction ratio of 1:3. Weighing less than 1lb, and only 1.6" / 40.6mm when collapsed, the Macro-Elmar-M 90mm f/4 is first choice whenever you wish to limit your outfit to a minimum without forfeiting the maximum in image quality. The Macro Adapter M was specifically developed as an accessory for the 90mm f/4 Macro lens. It allows close focusing with this lens from 2.5' / 76.2cm (reproduction ratio 1:6.7) down to 1.6' / 48.8cm (reproduction ratio 1:3). The Angle Viewfinder M shows a large, round, upright, and un-reversed central section of the viewfinder image of approximately 0.3". The freely rotatable 45° eyepiece makes it considerably easy to view the subject in all situations, especially when the photographer does not want to hold the camera exactly in front of the eye, such as when shooting reproductions or for close-up work close to the ground. This lens has been updated with the 6-bit coding, which allows the digital M camera to read this information optically and to identify which lens is being used. The camera can then apply final stage, software-based vignetting correction (for RAW images the lens used is simply recorded, no change is made).