I've been shooting high school swimming and diving since I got my K20D in 2009. I most often use the Tamron 70-200/2.8 and 28-75/2.8. It can be done, but it's not easy to get good results, and the K-5 that I got last year for Christmas has been a real blessing.
I agree that most light in high school pools is notoriously poor (that's when all the lights are actually working). It's dark, and often fluorescent, which flickers countless numbers of colors. Combine that with fast action, and it makes for what I think is the toughest test for a camera.
First of all, you have to get a fast shutter to have any hope of getting a good shot. For swimming, I use a minimum of 1/250, and for diving I need at least 1/400. With the K20D I typically use ISO 1600. That usually leaves me with f/2.8 or f/4 if I'm lucky. Focus is a challenge, and I often pick a focus point low which is the wave in front of the swimmer as he/she comes toward me, and use AF-C. For diving, I usually put on a manual 501/7 or 85/1.8 and prefocus, taking photos from a 90 degree angle. I often use Topaz DeNoise to help with noise (only for the really good shots).
Try again, but up the ISO so you can get 1/250 at f/2.8. Don't mind the noise - a noisy photo is better than a blurry one.
All that said, I have had much more success with the K-5, and if you can swing it, I would highly recommend it. My keeper rate has gone way up, and the quality is better as I can go to ISO3200 and stop down a bit to get a larger depth of field. My K20D has been relegated to taking the atmosphere shots of the crowd or the kids on the deck.
By the way, I'm surprised they allow flash at all. Usually that's a no-no at swimming and diving.
Originally posted by NeverSatisfied I've been using a K20D for the last several years and have generally been pretty happy with it. However, last night I shot my son's swimming event, and the results were pretty poor. I really don't think any of them were "keepers", and so I'm scratching my head- is it a lens problem, or perhaps sports photography is just not the K20D's forte?
I used both the DA*50-135, but more so the DA*300. Lighting at these high school pools is usually pretty dismal, and the best I could do for most of the shots was around 1/60, f4, and ISO 1250. I know that is way too slow a shutterspeed for such an activity, but the K20D gets really noisy at high ISO; I did use a monopod for the most part. It seemed to be a "perfect storm" of issues for both exposure and autofocus. I have used these lenses at outdoor events and had very little problem. Compared to the Tamron 70-200 I once had, their AF seems quite a bit slower. Results from last night were just not sharp at all, with lots of noise, although I did get better results (not always!) once I started using flash.
So I'm wondering, is it the lenses, or the camera? Has the K20D met its limitations for this type of use? Would a K5ii breathe new life into these DA* lenses? I've been wanting to upgrade anyway, but this might help push me in that direction sooner.