Originally posted by kunik I have the 1DmkIII. I think the 85/1.8 is a fine lens. I just like the Pentax 77 better.
I have both the EF 85/1.8 and the Pentax FA*85/1.4.
I use both lenses on my full frame 5D for quite some times now. What I would conclude are:
1. EF 85 is an okay lens with good resolution and smooth bokeh, but with no character!
2. Its colour rendition by no means can match the Pentax. Skin tones are not as nice, neither greens are as "green" as the Pentax ;-D
3. Its bokeh is smooth but not solid (I like the FA 85 more, but sometimes it produces "bright rings";
4. The Pentax is sharper at f/2.8 or below;
5. The plane in-focus is flatter for the Pentax than the Canon. Light falloffs at large aperture are similar.
6. Flare resistance of the Pentax is better.
7. Exposure accuracy is better with the Pentax, especially at larger (but not the largest) apertures! (stopped down metering)
But its not totally a fair comparison as the Pentax is of a higher grade and was sold higher anyway.
And, the sad thing is my FA* is just a plain old full manual lens when it is used on my 5D! :-(