Originally posted by tibbitts If you think the quality at 300mm was poor and not just "okay", I think that except for a little less purple fringing and slightly more contrast with the 55-300, you'll find the 55-300 is similar. So really the Pentax option for you is probably something like the 60-250 or 300.
I have a DA* 300 (as well as a DFA* 70-200) but neither of those really qualifies on the light and easy to tote around scale in my eyes, though both are excellent optically. I was hoping this would be a cheap and light option, with at least decent quality for hiking and travel. And it's certainly possible I got a bad copy.
I was shooting out at Antelope Island in the Great Salt Lake, where there are both bison and pronghorn antelope. The bison were actually too close to the car for the DA*300, so the 70-300 seemed a good choice. And it was for the close bison, but later when trying to get shots of some pronghorn butting heads about 50m away at 300mm zoom, the shots were very soft in good light with a fast shutter speed(and I don't have those kind of focus issues with the K-70 and DA*300). I was not pleased because sharp pics of the antelope butting heads would have been very nice. Still working to see if I can save them in Lightroom.