Thanks to Norm for this interesting thread.
Originally posted by noelpolar From experience the DFA150-450 costs a stop or so at 300mm over my F*300/4.5
So from your experience Noel, how would you rate K-3 + F*300 v K-1 + 150-450 at 450 for birding? On Norm's field test, I would expect the K-3 combo to do at least as well, if not better.
Let's bear in mind we are talking say $A2000 v $5800 here. Even if we said DA*300 instead of F*300, we'd still be talking no more than say $2500.
Originally posted by noelpolar mmm.... would it be safe to assume that the one f stop was to normalise DOF between formats, so ..... given an identicle lens then one stop of ISO needs to be traded for Norms approach. However in this case, lenses were not identicle (but maybe equivelent).... so a likely "t" stop difference between lenses resulted in a different shutter speed to maintain exposure?
Would a fairer comparison be 150-450 on each: at 300 f4.5 (or is it 299mm f4.5?) on K-3 and at 450 f5.6 (or should it be f6.3, for one stop difference?) on K-1.
Of course it isn't the whole story, even for wildlife. But at the moment, for wildlife, I'm thinking that the next APS-C flagship (with flippy screen, pixel shift, faster AF, and other tech improvements) is more worth saving for than the K-1. None of this is a knock on the K-1, even for my preferred uses. It's just that the APS-C flagship with a premium lens looks like great value for money.