Waltz 28-135mm Multi-Finder This is a universal multi-finder from Walz. It is compatible with rangefinder cameras such as Leica, Contax, Voigtlander, Nikon, and Canon. It is attached to the accessory shoe for use. The viewfinder has frames corresponding to each lens, allowing it to support lens focal lengths of 28/35/50/85/100/105/135mm (a great mechanism like a zoom lens). With this single unit, you can cover all seven focal lengths of lenses mentioned above. It's a great product! ・Model: Walz Multi-Finder ・Size: (Outer diameter) 30mm, (Total length) 46mm ・Weight: 88g ・Finish: Black Chrome ・Viewfinder Frames: 28/35/50/85/100/105/135 mm ・Parallax Correction: 3 feet – ∞ Variable Thank you for viewing.