Doing a series of group photos, camera on tripod, no change in settings or position or lighting. In a series of photos, exposure varied wildly, from correct to somewhat overexposed to totally overexposed. Properties confirm that both aperture and shutter speed contributed to over-exposures. My question is, why? Software malfunction? Worn out camera? Is it fixable, or is it time to shop?
This one worked fine.
Next shot; no setting changes.
Repost with "store original" checked to preserve the Exit data. No one can tell you anything at all from these thumbnails.
Here are the original photos.
Thanks! Been reading the forum for a year or two; this is my first issue where I really need some experienced advice.
Tom29520 wrote:
Here are the original photos.
That a one of them anyway.
I checked store original on the second post. I'll try again.
What mode were you shooting in?
#1 f/4, 1/200 sec, ISO 100
#2 f/1.8, 1/25 sec, ISO 100
Linda From Maine wrote:
What mode were you shooting in?
#1 f/4, 1/200 sec, ISO 100
#2 f/1.8, 1/25 sec, ISO 100
I'm on my phone and can't see the EXIF data myself, but what you posted would certainly explain it. An additional 2 & 1/3 stops from the wider aperture, and 3 more stops from the slower shutter speed. The question is whether there was a camera misfunction or was it user error. Doesn't the EXIF data indicate the mode he was in?
mwsilvers wrote:
I...Doesn't the EXIF data indicate the mode he was in?
I'm on a Chromebook right now with just a basic exif reader. Only additional info I can see is date and time.
Tom29520 wrote:
I checked store original on the second post. I'll try again.
For the blowout you were shooting in what appears to be bright light and using a 1/25 sec exposure at F1.8 while in "Program" mode.
The properly exposed image was also shot in Program, 6 seconds before the blowout and came out at 1/200 sec and F4. (Both at 100 ISO)
I would venture to say that you have an in-camera metering issue and it may be time to upgrade to a newer camera.
Linda From Maine wrote:
What mode were you shooting in?
#1 f/4, 1/200 sec, ISO 100
#2 f/1.8, 1/25 sec, ISO 100
"P" - Program AE Mode. I mentioned tripod because I've bumped the knob in the past and changed mode, but on tripod all I touched was zoom and shutter. Also, mode would not seem to be the problem because exposures varied from good to really lousy and back again several times over a shoot of about 150 photos, with same location, same settings, same lighting, etc. If more samples would help, I've got plenty.
MT Shooter wrote:
For the blowout you were shooting in what appears to be bright light and using a 1/25 sec exposure at F1.8 while in "Program" mode.
The properly exposed image was also shot in Program, 6 seconds before the blowout and came out at 1/200 sec and F4. (Both at 100 ISO)
I would venture to say that you have an in-camera metering issue and it may be time to upgrade to a newer camera.
Is it the consensus of UHH folks that the camera is a goner? I hope not, but I can't think of any other explanation.
Tom29520 wrote:
Is it the consensus of UHH folks that the camera is a goner? I hope not, but I can't think of any other explanation.
Would exposure lock cause the problem, maybe metering with the lens cap on or pointing at something very dark.
I would have thought in the view finder it would give the selected shutter speed and f-stop before you take the shot. maybe just try some random shots and look carefully at what the metering is saying. With my Pentax when exposure lock is on there is a * in the view finder.
check the manual for your canon.
You could try manual modes see if they are working for you.
Tom29520 wrote:
Doing a series of group photos, camera on tripod, no change in settings or position or lighting. In a series of photos, exposure varied wildly, from correct to somewhat overexposed to totally overexposed. Properties confirm that both aperture and shutter speed contributed to over-exposures. My question is, why? Software malfunction? Worn out camera? Is it fixable, or is it time to shop?
Tom,
A little over a month ago my Canon 7D started giving me intermittent exposure problems however my photos came out dark. It wasn't long after that, that I got error 20 messages and the camera failed to work. I had taken about 60,000 photos with it prior to its failure.
I had to send it in to have the shutter replaced. I haven't had any issues since. I sent it to
http://www.unitedcamera.com/. They fixed it and got it back to me in a little over a week.
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