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January 27th, 2007, 10:13 AM | #1 |
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Focus pulse
Ok, I read earlier threads on focus pulsing and thought they were wacko.
But I had it happen to me this week. I was shooting a long shot of boats at infinity, ois on, probably af on, not zooming. First couple seconds of this one shot are fine, then it goes into a rapid (i'm guessing, but maybe 4x per second) in-and-out of focus pulsing. Much faster than the af works. I was shooting similar shots all day, both before and after, and it only happened for this one shot, and not for the whole shot. Anyone else have this happen? I'm wondering if it could be rf inteference from a cell phone or a motor? |
January 27th, 2007, 11:52 AM | #2 |
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You didn't mention your shooting mode. Was it 24F?
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January 27th, 2007, 04:33 PM | #3 |
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It was 1080i60 when it happened.
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January 27th, 2007, 04:56 PM | #4 | |
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Quote:
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January 27th, 2007, 05:06 PM | #5 |
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Hi Chuck, I have had this same thing happen to me. I believe it is just the Auto Focus trying to chose the subject. Much like what Khoi said. I would recommend using manual focus anyways.
Best of luck! ~Gabriel
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January 27th, 2007, 06:08 PM | #6 |
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i had this happen to me this week--but I had my A1 on manual focus. It has some weird pulsing issues. Fairly minor, and it's at the edge of the frame. I'm shooting at 60i. I don't think it's in every shot--don't know yet. I haven't tested it too thoroughly.
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January 28th, 2007, 12:09 AM | #7 |
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It seems much too rapid to be af hunting. It's very unlike any af issue I've seen before.
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January 28th, 2007, 12:47 AM | #8 |
Obstreperous Rex
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Is this happening when the Instant AF feature is on? If so, that could account for the rapid hunting.
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January 28th, 2007, 09:19 AM | #9 |
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For me, no. I'll post a short clip as soon as i get back in my editing room. no af, no iaf.
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January 28th, 2007, 01:37 PM | #10 |
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I seem to recall that I was able to create the effect with IAF on and off. Now I definitely have not been able to create the pulsing with AF completely off.
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