More basketball from the BBL

[stoltzy]

JohnG wrote:

Both shots are back focused. The defender behind him is in better (but not sharp) focus.

JohnG I have the same problem with the back focus. What is the best way to correct this. I use center focus on my Canon 20D.

Thanks

stoltzy

[JohnG]

stoltzy wrote:

JohnG I have the same problem with the back focus. What is the best way to correct this. I use center focus on my Canon 20D.

Thanks

stoltzy

The answer is: it depends.

You need to determine if it's an equipment problem or a technique problem. Does the 50mm backfocus for other puroposes? Or just basketball? Does the camera backfocus with other lenses (be careful here - the more DOF you have the harder it is to detect front/back focus issues). Do some tests on stationary subjects and figure out if it's equipment.

If it isn't the equipment then it's technique. Typical reasons are:

1. Not tracking a high contrast area

2. not using AI-servo

3. Not keeping focus point on your subject

4. Not tracking long enough before firing shutter (on 20d that's about a second in low light)

5. Change of direction in your subject's movement