Originally posted by weijen Hey, I noticed everyone's talking about pairing the K1 with the famed FA31, FA43 FA77 etc. I'm just curious how the camera will perform with the cheap 28-80ish zooms from the 80s and 90s like the F35-70, FA28-70 and so on. Who knows there may be gems out there? Or would you consider it a disgrace to mount those lenses to that super high end K1?
I did a bunch of tests with the 28-70mm f/4 and the 28-80mm f/3.5-4.5 today on the K-1, mostly at f/8 as they are both soft at f/4 or 4.5, and other than a little more reach on the 80mm, they appeared identical in performance.
If I would keep just one it would be the 28-80, even though it's not constant aperture; my copy is just a bit better than the 28-70 wide open.
So I wouldn't call them gems, but since the K-1 is FF it's probably more likely that you'd be stopped down from wide open to f/5.6 on either of them to avoid softness.
I suppose with 36mp and Lightroom you might get by with either wide open, and a lot of clarity/dehaze/sharpening.
The 28-80mm is going in my bag until something better comes along that doesn't need me to sell the other kidney.