TRhoads wrote in post #18262802
ok...so...what is it about that lens that everyone seems to loose their mind over...I have gone through some of the thread on FM and maybe I just don't get it...what makes it so special?
based on my reading of the lens, it's sharper than canon's 70-200 f2.8 ii, and contrast like zeiss primes like the 100 makro planar, and through most of it's focal range. I've read posts that suggest it as sharp and more contrasty than most primes in it's range. There are posts comparing the zoom to the 180 apo lanthar, cy 100 f3.5, ect.... even to the new canon 100-400ii. That's a pretty darn high standard, and I think I've seen a comparison with the 2x converter to make the lens 600mm, resolve the moon pretty well. 2x teleconverters typically thrash image quality if you have a weak baseline.
a bag of primes in zoom format.
what I like about it is two fold.
1. I've got to have a long lens for landscape shooting, with 300mm on the long end at minimum.
2. 300mm primes are generally big, and carrying them to shoot landscapes becomes impractical if you want to shoot 100mm... it's not like smaller and wider focal lengths, which can be controlled somewhat by foot movement.
I already have the 70-300g, and it's does a good job, but I do struggle at times deciding if I should shoot my 200mm prime for ultimate quality or zoom for killer flexibility. Often, I'm happy with my 200, but I hate that it's only 200, when a scene is a little too distant and I need 300. I cant walk past the cliff edge to get closer 
Sony A7siii/A7iv/ZV-1 - FE 24/1.4 - SY 24/2.8 - FE 35/2.8 - FE 50/1.8 - FE 85/1.8 - F 600/5.6 - CZ 100-300 - Tamron 17-28/2.8 - 28-75/2.8 - 28-200 RXD
Panasonic GH6 - Laowa 7.5/2 - PL 15/1.7 - P 42.5/1.8 - OM 75/1.8 - PL 10-25/1.7 - P 12-32 - P 14-140