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| Focusing at nite | |
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| Tweet Topic Started: Apr 13 2008, 08:13 AM (994 Views) | |
| Ming | Apr 13 2008, 10:29 PM Post #11 |
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I have used 18-70mm with A100 a night , with slow sync flash , did not have problems like this . But i don't do the focus method you used . I will just zoom to the frame i wanted , focus on the subject then move the camera back to frame . Otherwise , there is still a 9 Point Focus for you to chose ma . |
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Ask ... Absorb ... Equip ... Execute N E X with M I N G HERE ! A P - Ming HERE ! Macro-Ming HERE ! Pano-Ming HERE ! Food ! Food ! Foods ! HERE | |
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| cjng | Apr 13 2008, 11:35 PM Post #12 |
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Emeritus Alphadslr Official Passerby~shooting badly since 2004 and continuing
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18-70mm is not a parfocal lens, u can't af lock and then zoom in/out to reshoot. http://en.wikipedia.org/wiki/Parfocal_lens |
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My Fotogallery Hello CZ! bye bye G! | |
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| Slowy | Apr 14 2008, 02:01 PM Post #13 |
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Alpha Elite Member
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Thanks guys, Will try the methods next time when I go nite shooting again. hee. Btw, I notice that the shutter time jumps with different F-stop number. How does this two numbers relate to each other?? At small f number the DOF is shallow, which is noticeable. But when shooting at high f number, the changes does not appear noticeable for me. How do we decide what F number to set for different scene?? What a high F number useful for?? |
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View my creation at http://slowy.zenfolio.com U can call me sotong or Arita Momeifu | |
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| yk200 | Apr 14 2008, 02:19 PM Post #14 |
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Alpha Elite Member
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bro... u need to read up some basic photography before hand. This link to bro sulhan is quite useful. It should answer ur question on F-stop and DOF.
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| zcf | Apr 14 2008, 02:53 PM Post #15 |
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Alpha Elite Member
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Sometime I use Manual focus when face problem like this, may need to shot a few more times though. |
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8:23 AM Jul 11