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Post by Jun Gregorio on Sept 14, 2008 4:48:47 GMT
Can someone tell me how I can maintain focus while shooting object in motion?
I have set my AF to AI Servo, centre focal point, Hi-Speed cont shooting.
I press the shutter halfway to set AF. then I follow the subject until I'm ready to shoot.
I let a 4-6 frame burst. But this is when I come into my problem. After the burst, I loose my AF therefore it waste time to reacquire AF. By this time my subject becomes unfocus or gone.
I'm sorry I'm sure this is not a new problem. I didn't even search to see if someone has already asked this question.
BTW, my 70-200mm was set to 3m to infinity
Thanks in advance
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Post by Neon Rosell II on Sept 14, 2008 6:07:21 GMT
If you have steel hands and can keep the subject in the center focus then there would be no problem  What I do to re-acquire focus is to let go of the shutter and half pressing it again so that the camera will again focus, doing it several times. It also depend on what camera body you are using. But keeping the subject centered all the time, I think, is the main problem especially if you are hand holding. |
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Post by Jun Gregorio on Sept 14, 2008 14:22:47 GMT
If you have steel hands and can keep the subject in the center focus then there would be no problem What I do to re-acquire focus is to let go of the shutter and half pressing it again so that the camera will again focus, doing it several times. It also depend on what camera body you are using. But keeping the subject centered all the time, I think, is the main problem especially if you are hand holding. I see. so this lag or slack time is normal. It's just a matter of fine-tuning the skills of tracking the subject. K, thanks for your comment. I was trying to differentiate whether it is a technical or skill-set issue. In the future I won't be so kuripot on my burst. I'll keep the shutter pressed longer to prevent lost of focus. BTW, I was using a 40D |
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Post by Romy Ocon on Sept 14, 2008 23:47:01 GMT
Jun, you can use all points AI servo if the BG is sky for easier tracking. If the BG is terrain, then switch to center point for better AF response. It takes a lot of practice to consistently keep the AF bead on a BIF.
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Post by Jun Gregorio on Sept 15, 2008 3:59:07 GMT
Jun, you can use all points AI servo if the BG is sky for easier tracking. If the BG is terrain, then switch to center point for better AF response. It takes a lot of practice to consistently keep the AF bead on a BIF. that's what I found. It's so hard to track BIF. You almost have to study their flight pattern/behaviour so that you can anticipate their moves. Like what Neon said. One must have steel hands (or else use a tripod). Thanks to both of you. Jun |
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Post by William Nguyen on Oct 12, 2008 14:33:04 GMT
Not sure what camera you have assuming it's a Canon there's a button called AF-ON available on the 40D, 50D and 1D's. In AI Servo mode hold this button down with your thumb to maintain focus without having to half press the shutter button. I have been using this quite a bit and find it very good, in fact I have more success than just the shutter button alone for BIFs.
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Post by Jun Gregorio on Oct 12, 2008 15:54:07 GMT
Not sure what camera you have assuming it's a Canon there's a button called AF-ON available on the 40D, 50D and 1D's. In AI Servo mode hold this button down with your thumb to maintain focus without having to half press the shutter button. I have been using this quite a bit and find it very good, in fact I have more success than just the shutter button alone for BIFs. I have the 40D. And I do have that button. hahaha I guess when everything fails...then read the manual holds true ;D ;D ;D With the gangs suggestion on focusing points, I've been getting better lately but I'll try AF ON on my next trip. |
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