Thanks Dylan. I'm assuming once upon I time you had a crop camera. Do you miss the reach with wildlife, or does overall 5d iii just make up for it?
Also lens suggestion? I'm nervous I'll get frustrated with 24-70 as I am used to 15-85 (nice lens btw). Can you use an f4 for stars?
The longest lens I have is 400mm f2.8 IS II. I added 1.4x and 2x TC III not too long after. That combo gives me 560mm f4 and 800mm f5.6. I guess long FL is not really an issue for me.
I like fast lenses. I would highly recommend 24-70 f2.8 II and/or 70-200 f2.8 IS II(works really well with current TCs).