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11/13/2005 12:00:08 AM · #1 |
I went out shooting landscapes today (bright and sunny here) I had the camera on Av mode, set to f16. Problem was that the camera constantly overexposed for the sky/cloud and underexposed. I never knew it was quite possible to massively over and under expose on the same image. I do now! The photos from the Sony are not great either, but the Canon is much worse. The shutter speed was coming up 1/10 - 1/50 of a second, I know this is too slow, but why was it doing that when I was in Av.
very confused, thanks for any help. |
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11/13/2005 12:01:46 AM · #2 |
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11/13/2005 12:06:29 AM · #3 |
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11/13/2005 12:13:10 AM · #4 |
Av mode on the canon means you choose the aperture and the camera will set teh shutter to get the proper exposure. It can go as slow a 30 seconds. NOT 1/30, but a full 30 seconds!
If one of the values blinks (ap or shutter speed) in teh viewfinder then you are beyond what the camera can compensate for (usually seen in a low light environment in Tv mode when the ap cannot get big enough, it'll blink)
Did you set the exposure compensation to something? I am always screwing mine up - in M mode the button that adjusts aperture in the T and A modes adjusts exposure compensation. This can cause what you describe.
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11/13/2005 02:09:07 AM · #5 |
Originally posted by pgatt:
I went out shooting landscapes today (bright and sunny here) I had the camera on Av mode, set to f16. Problem was that the camera constantly overexposed for the sky/cloud and underexposed. I never knew it was quite possible to massively over and under expose on the same image. I do now! The photos from the Sony are not great either, but the Canon is much worse. The shutter speed was coming up 1/10 - 1/50 of a second, I know this is too slow, but why was it doing that when I was in Av.
very confused, thanks for any help. |
Not clear what you're describing here: "overexposed for the sky/cloud and underexposed"?
My best guess is, the foreground's underexposed and the sky/clouds are STILL overexposed? This can happen easily with the 10-22mm, as I have found out, 'cuz the horizontal angle of view is around 100 degrees and if you're shooting even the least bit upsun you're gonna have a really bright area of sky on one side or the other. Matrix metering will tend to leave that uncorrected, even while making the foreground too dark. It's a real problem.
I find I NEED to shoot RAW with the 10-22mm more than with any other lens, no two ways about it. Get that exposure down and run it in low contrast mode. Juggle it carefully in the converter, then in photoshop. A LOT of really nice landscape pics with the 10-22mm simply cannot be accomplished in basic editing.
Robt. |
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11/13/2005 04:54:12 AM · #6 |
I think bear your description described it best - I knew what I was doing, or felt like I did anyway, and the photos were generally ok but with blown highlights. Then I tried to turn down the exposure compensation to negative to compensate and had underexposed shadows and still the blown highlights. Tried with all different metering modes, trying ro figure out what I was doing wrong, and I had an inkling that it might be cos' of the wide angle, but I wanted a wide angle shot so didn't try another lens. Okay.... Paul goes off to shake his head and realise that Canon Raw will have to come much sooner than he had planned. If that's what the 10-22 takes, then so be it.
Message edited by author 2005-11-13 05:00:06. |
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