Another few... getting near the end of this batch... the next batch is going to be a fun series of mother/son portraits, but not of what you might initially think, heh.
I keep hearing that the F*300mm is a better lens optically, but I don't know... here are a couple (1st and 3rd) wide open and cropped a little, they seem ok to me? The F*300mm probably gains a little of it's following because you don't have to worry about SDM failure, and it starts at F4.5, so maybe a hair sharper wide open? Beats me... so far so good on this one, but if it goes bad, I guess it'll be off to Uncle Vanya for the retrofit to screw drive. For now, I'm going to try not to worry about it and am enjoying using it immensely.
Pentax K-1 smc PENTAX-DA* 300mm F4 ED [IF] SDM ƒ/4.0 300.0 mm 1/20 iso400
Pentax K-1 smc PENTAX-DA* 300mm F4 ED [IF] SDM ƒ/5.6 300.0 mm 1/90 iso400
Pentax K-1 smc PENTAX-DA* 300mm F4 ED [IF] SDM ƒ/4.0 300.0 mm 1/90 iso400