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05/21/2005 09:42:43 PM · #1 |
WTF?
What is that? What causes it? A LOT of my pictures have it - on TWO cameras...That's the original 100% crop. WTF?
Anyone?
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05/21/2005 09:48:19 PM · #2 |
| What are you taking about, the noisy background? The little spot on the tooth? And what setting did you have your camera set at? |
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05/21/2005 09:49:30 PM · #3 |
The noise and pixelation in the background. The spot on her tooth is my photoshop cursor. :) I'm going back and seeing this in a LOT of my pix - is it just cuz I am looking at 100% and I usually only do for stock (lots more light in general) or ........
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05/21/2005 09:51:48 PM · #4 |
Yeh, some data on the shot would be great...
Aperture & shutter speed?
ISO?
Shot in RAW/ JPG? If RAW, was exposure boosted in conversion? If so how much?
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05/21/2005 09:55:45 PM · #5 |
| It's probably caused by the underexposure in the background. The histogram for the red and green channels are bunched up at the left (dark) side. That's a pretty good indication ,to me, that it's underexposed. |
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05/21/2005 09:55:59 PM · #6 |
f1.8, ISO 400, 1/250 shutter, JPG.
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05/21/2005 09:57:05 PM · #7 |
Ok... but if I'd exposed it brighter, she would have blown out, especially in her teeth... so how can I fix this and how would I fix it in the future?
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05/21/2005 10:01:23 PM · #8 |
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05/21/2005 10:03:59 PM · #9 |
The flash looks pretty direct. Less direct, (more diffuse) fill flash would certainly help. Since the room light is tungsten (very red) you might consider a gold reflector for the flash to warm it up, making the difference in flash vs. ambient light color temperature a little less dramatic.
A lower flash power level and longer exposure would also provide a more natural mix of ambient an flash illumination. Try leaving the ISO at 400, but shoot at 1/100, that will bring up the levels in the BG and increase the signal-to-noise ratio significantly.
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05/21/2005 10:06:15 PM · #10 |
No flash used - there was a door behind me that was in front of her though... I guess it acted like flash. However, same banding issues in other pics.
M
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05/21/2005 10:12:20 PM · #11 |
Ah, now I see why the catchlights are a double-rectangle shape. Was the light coming through the door fluorescent? That would explain why it looks like flash illumination.
Another approach with this would have been to reduce ISO to 200, shoot RAW, and expose a little more to the right. Your shutter speed would have been about as low as you'd want to go, though, between 1/50 and 1/80. I think 1/50 might have given more trouble with subject motion than the noise, 1/80 would probably have been workable though.
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05/21/2005 10:16:56 PM · #12 |
1/80 vs 1/250 would have made a big diff huh? I normally keep it on f1.8 unless I'm on a tripod and then I shoot f8. I looked at the f8 shots and they are better.
The light coming through the door was natural sunlight actually.
Thanks! I hope I get it...I'm going to have to test some longer shutters.
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05/21/2005 10:17:30 PM · #13 |
| You might try moving her a foot back so the light range is smaller. Use a reflector to get more light to her or use a small amount of fill flash to make her pop but meter for the surroundings. Rear sync fleasy will help with the movement if there is any. |
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05/21/2005 11:27:08 PM · #14 |
Didn't expect it but I get noise with the 300D at ISO 400, so try to only shoot ISO 1-200. Low lighting with sports games are the only exceptions, and I just have to deal with the noise.
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