- Jan 22, 2022
I dipped into the fixed aperture pool and picked up a 600 STM and got a bad copy, turned me off but made me realize after I returned it how specialized it is and the use cases I might use it for are very infrequent so I turned my resources towards patience and vaporware, lol.No doubt these patents are interesting. The RF 100-500 is a little slower at the long end than the EF 100-400, but by all accounts, it is at least as sharp and a little lighter. Again, you need a TC to equal the Tammy for reach, so if you are looking for 600, then one of the new ones would be nice. I have the EF 800L and just ordered the RF 800 f/11 because it is so much more portable and from the samples I have seen, it is sharper than the 100-400 with a 2x TC (but still not as sharp as the 800L by a fair bit). As the saying goes "horses for courses".