I used a 40mm pancake on my 5d2 and whilst its nicely sharp, I find the slow STM focuser frustrating as hell. I recently picked another 50 1.4 and feel so much better. I will keep the 40 though.
The 40mm is such a great lens, and such a good deal. I shoot that thing at 2.8 all the time and the pics are super sharp. I've never noticed any problems with how it renders colors. Honestly, just buy it and even if you get the 35L later, you'll still love the 40mm for when you want a really light set up.
Im tryna find a prime lens for my 7D to walk the streets with. Im currently using my 5DMKIII with the 50mm 1.4 and i love it. Which lens out of the 2 would match the quality and look of that FF combo??
Any thought or suggestions would be great.. Thanks