Originally posted by agukha Not bad for a zoom that long !
Yeah, I'd really like the Pentax 150-450 for this. The telescope is nice but it isn't perfect to use for this kind of thing; it's simply not designed for it. It's a pain to focus and no controllable aperture (it's always wide open at 5.9). With this, it also makes the depth of field very narrow. Not noticeable in this shot so much as I'm further from the eagles (about 2x the distance) than I was with my owl shot, but still in some of the frames, parts of the tree were even out of focus.
As well, the fringing isn't the best, as it is only a doublet. But: it lets me get the shot, so it's 100% better than nothing.