Lens: Canon EOS (EF/EF-S) D/SLR Lens
Camera: Micro Four Thirds (MFT, M4/3,M43) Mount Mirrorless Camera Body
As Canon's EOS lenses are electronically controlledï¼Œmost Canon EF mount lenses do not feature a manual aperture ringï¼Œso when used on our EOS-M4/3, which is a fully manual operation adaptor ring, the aperture could not be transferred to the camera, it will stop down to its smallest f/stop by default.
Infinity focus position: the position of the infinity mark of the telephoto lens or super-telephoto lens is shifted slightly to the positive side to enable focus adjustment even when focus shift is caused due to temperature changes. The shift range is denoted by an L-shaped line, Be sure to check the focus through the viewfinder even when you shoot at infinity.
Adapting full-frame lens to APS-frame camera (i.e: large format to medium format, medium format to 35mm, 35mm to micro 4/3) provides excellent edge-to-edge sharpness. The smaller image field helps minimise the effects of lens distortion and aberration by using the 'sweet spot' or centre of the larger lens image circle. and it will magnify the focal length by 1.6 on Canon, 1.5 on Nikon and Sony, 2.0 on M4/3 camera.