« on: May 29, 2013, 07:17:15 AM »
No matter how good the Zeiss 100mm is, the Canon 135mm f/2L has great IQ AND it can autofocus which is a great plus for that focal length (until your subjects sit still).I was going to recommend the 135L, but the Zeiss is a great piece of glass. 100mm also is also closer to your 35mm. As somebody else pointed out, the gap between 35 and 135 is a big one.
Every 2x in focal length results in 4x FoV. You can fit four 70mm lens frames inside one 35mm lens frame (sh :)ot from the same distance) and almost sixteen 135mm lens frames inside one 35mm lens frame.
Plus, one could get a 135mm f/2L and a 85 1/.8 (which is a very decent lens) for the price of Zeiss.
Keep in mind that the above come from someone who swears by his Zeiss Distagon 21mm 2.8.
However, I also have the above 2 mentioned Canon lenses and I am very happy with them