I have a question for anyone who would care to help. I've been thinking about making the switch to FF in the next year and have a question. At what point does one notice the difference between really good zooms and prime lenses? For example, I'd love a 5dsr and would really like a 11-24, 24-70 2.8, and a 70-200 2.8. However, I take a lot of landscape, have no need for quick fps rates, will use a tripod most of the time, and wondered if primes would be seriously that much better. I mean, everywhere I read, the above zooms are stellar, and seem to take a lot of beating. I've even thought of getting a couple of Zeiss otus as I don't mind MF...but...at what point would I really tell the difference? Would I have to produce 2ft. prints to see it, or will there be a marked improvement at A3? Most of my stuff will be at A3 or A2 with the occasional image blown up very large. I used to love shooting with Zeiss in the old days (film) because I could point them straight into the sun and still get flare free stunning images. Any help offered would be greatly appreciated. Thank-you.