Originally posted by leonardotmnt I've been using the 55-300 WR for my son's U10 soccer games. I get fairly inconsistent results but I'm not sure how much is me and how much is the lens. I get some pretty sharp shots at lower focal ranges but toward 300 mm they're not as sharp. I also have a lot out of focus. I'm wondering if it'd be worth it to upgrade to the new PLM model for faster focusing. I'd like better image quality as well but there don't seem to be many long lenses for Pentax at a reasonable price range that focus quickly. Even if I could afford the 300 I think it might be too long for a lot of shots. So, worth considering the upgrade to PLM or is the focusing alone not enough to bite? Thanks in advance.
1. You wonder if it is you or your current 55-300 that is causing your frustration. It might be the lens (possibly), but it also might be how you are setting up you cam body or how you are using it. Have you checked out some of the threads discussing AF? E.g. --
Perfect focus everytime - PentaxForums.com A case for the supremacy of Pentax AF - PentaxForums.com Best autofocus mode to use with high-speed continuous shooting? - PentaxForums.com
[etc.] Perhaps you are well educated and quite experienced with nuances of AF (I can't tell from your post), or perhaps not. Perhaps you could describe more about what cam body you are using and what settings and techniques (etc.) you are specifically trying to employ...
2. Are your worst results on players moving towards or away from you? (I hate to say so, but...) Pentax AF is not at its best in "predictive" AF situations (check out the second video at
HD Pentax-DA 55-300mm F4.5-6.3 PLM WR RE Review - Focusing | PentaxForums.com Reviews).
3. Do you have enough light during games for the relatively slow 55-300/4-5.8 to be able to succeed? (The newer 55-300 PLM is even a bit slower at f/4.5-f/6.3.)
4. Despite all of the above, I myself do strongly recommend the newer 55-300 PLM -- it is (I think) just a wee bit sharper at the long end than its predecessors, and it is markedly faster (check out the first video at
HD Pentax-DA 55-300mm F4.5-6.3 PLM WR RE Review - Focusing | PentaxForums.com Reviews) and maybe a bit more accurate in its AF ability (as long as it "sees" reasonable amounts of light). I have used mine (on a K-3) for both kids' outdoor soccer and indoor basketball games with generally pretty good results (no, not 100% keepers, but not all that many throwaways either).