Speaking of lens MTF charts and full frame file quality, here's an
80% crop taken with my 500/f4 S-I and the 2.0x TC-III, on the 5D3. The S-II is supposed to be even better, but I'm already blown away with my S-I:
Goldfinch shows me his profile. by
dcstep, on Flickr
I see people pooh-poohing using TCs all the time, claiming the IQ penalty is too large. I claim BULL SHIT. Those people couldn't have ever tried it. I even had one guy claim that his standards must be higher than mine, because anyone could see the distortion.
