To utilise quality old lenses with your new camera, or match a different make of lens to your camera. For heavy medium format lenses, we suggest to use with a telephoto bracket and a tripod to balance its weight when shoot. Urth Micro 4/3 lens mount adapters allow you to use third-party and vintage lenses with your camera.

A mismatch of fractions of a mm that would merely throw off infinity focus with a normal prime can wreck havoc on the corrections and thus the image quality of an ultrawide.The smaller image field helps minimize the effects of lens distortion and aberration by using the 'sweet spot' or center of the larger lens image circle.

Tom, Weight savings, that is the reason I bought into M4/3 back in 2012 and then Sony 2-1/2 years ago. To determine the full-frame equivalent focal length, simply double the Micro Four Thirds lens focal length. On full frame Sony Alpha E-Mount bodies such as the Sony A7/A7r, the image circle from MFT lenses will not cover the full frame sensor. To determine what the new 'Crop Factor' or 'Equivalent Focal Length' of the lens when used on your camera will be, please check the Fotodiox Knowledge Base article.The MTF Services Ltd B4 2/3" to E-Mount Lens Adapter enables putting B4-mounted lenses designed for video cameras that use an optical prism, onto your Sony E-mount single-sensor camera. Kipon 4/3-NEX adapter is designed for the Sony E mount camera, allowing Olympus DSLR Four Thirds mount lenses to be mounted onto Sony E mount camera bodies. Also, I am dealing with converting a full frame lens to a 4/3rds sensor, so there might be problems with that if a shift lens is being used. The chrome Lens Adapter from Metabones allows C-mount lenses to be attached to a Micro Four Thirds format camera. I would suggest looking into a shift or tilt-shift adapter, to mount say a wide-angle Canon EF or Nikon AF-S lens.