As far as SLR lenses go, I've heard the best things about the Zeiss ZF lenses (thank you Andrew Walker), especially with respect to the mod-jobs done by Duclos. For the price, it sounds like they're a great lens.
The one thing that concerns me about the Zeiss lenses is that a lot of the test footage I've seen exhibits noticeable breathing in focus pulls, despite the fact that they are prime lenses. They don't breathe THAT much, but a little breathing is too much!
Can anyone comment on the Canon L line of lenses? I've heard that it's the top glass made by Canon, especially the 50mm f1.2L. Considering the price for these lenses is 30-40% more, it seems like there may be a good increase in quality and construction. I'm wondering if anyone has shot with this series, can comment on its quality, perhaps even post any footage or screen shots? Any input is great!
Also, I am aware that the Canon lenses do not feature an iris ring on the lens itself and that would have to be camera controlled. It's not a big concern of mine, considering you generally don't pull the iris during a shot.
(I will be using the glass with an S35 Scarlet- motion, and no, I don't have the budget for legit cinema lenses :-) )