Screws into the eyepiece of the M cameras to magnify the central area of the viewfinder. Converts a 0.58 into a 0.72x, a 0.72 into a 0.9, and a 0.85 to a 1.06x magnification. Very small unit, can be permenantly left on camera. Especially useful for the 75mm/90mm and 135mm lenses. (not 28/35mm!)
Supplied with blackened brass safety chain and strap-fitting case. Rubberised eyepiece built-in.