Canon Sigma 20mm F1.8 - Full frame

[chrisjlee]

Anyone know if the sigma 20mm F1.8 work on a full frame. I searched around but no luck. Anyone use this on a 5D? If so does it vignette or get soft around the edges?

[Manfr3d]

Well its pretty soft up to f4 already on a 1.6x Crop body according to this review:
http://www.photozone.de/8Reviews/lenses/sigma_20_18/index.htm

[chrisjlee]

Mystery solved. It can be used on a full frame camera without any problems;

[Manfr3d]

Yes of course, its a full frame lens. Guess I didnt get you at first. But the lens is still very soft.

[chrisjlee]

Yes of course, its a full frame lens. Guess I didnt get you at first. But the lens is still very soft.


Thats true. You shouldn't ever shoot wide open with it. You have to stop down to 4 or 5.6.