CCTV/Bolle lens on M43 or OMD EM5
Andy Crowe wrote:
C-Mount lenses are quite variable on m4/3 as not all of them cover the entire 4/3" sensor. They often range from having just slight distortion and shading in the corners to the image being a small circle in the middle of a photo.
I own a Carl Zeiss 25mm f1.4 C-mount lens and a Fujinon 35mm f1.7:
The Zeiss lens is pretty good quality, with nice sharpness but a little distortion and vignetting around the corners which means it's not great for general purpose photography but works well for portraits.
The Fujinon is a little strange, no vignetting but it can't focus outside the central area which creates a soft focus effect. Again good for portraits and for interesting effects, but no good for landscapes
The Fuji effect is nice and adds a different look the image but for the money I'll go with the Sigma