Originally posted by 3by2 Interesting that you've got both lenses, that in itself tends to suggest the 55-300 isn't a bad lens. I had considered it but looking through pictures taken with both lenses liked the results from 60-250 which also seemed to be more consistent than the 55-300. I've been disappointed in zooms too often, hence aiming a bit higher this time. Like you have, I'd also considered adding a TC at some point in the future to extend the range if I needed to. Interesting to know where you see it in terms of size too, that's often difficult to gauge from stats and pics. Strategy for carrying it would need to be worked out but I'm seeing it more as a static lens which will come off when I need to move on.
My feeling is the DA* is a safer bet. My first DA 55-300 PLM was so so, but I dropped it on the camera and it broke in half. I missed it so much I bought a new copy and the new one is stellar. But, I can buy three copies of the 55-300 for the same money as the 60-250.
The thing is, even with the TC, the 60-250 is only 50mm more than the 55-300.
I'm still ambivalent about using the 55-300 with a TC, but I do have some good shots taken with that combo. You think 420mm, but you probably need to keep the 55-300 and TC at less that say 370mm to get good images, so really not much difference at all there.
Some more images for you....
DA*200 with 1.4
K-3 and DA 55-300 PLM @150mm
K-3 and DA 55-300 at 300mm
DA* 60-250 with 1.4 TC for 350mm
As you can see, these three lenses in terms of IQ are pretty similar. The 200 gives you 2.8, the 60-250 give you ƒ4, or with the 1.4 TC ƒ5.6. So you'll get some shots with the 200 and 60-250 you might miss with the 55-300, but to my mind, if you aren't sure how much telephoto you'll shoot, the DA 55-300 is the lens to get and play with before you decide you want more. On the other hand, if you know you'll want a fast lens, you want the DA*200 2.8. And the 60-250 is the best "I know I will use it and I want it for a lot of different circumstances " lens." The difference between ƒ6.3 and ƒ4 is huge when you are running out of light. (And of course between ƒ6.3 and 2.8 even being even more huge.)