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Jun 1, 2015 11:39:27   #
b2bjacks Loc: Sequim, Washington
 
Just uploaded a few hundred photos to Adobe Lightroom. And found about 12 that were very under exposed. Sample #1 is without any adjustments. Sample 2 is still a tick under exposed with a plus 4.00 exposure adjustment. This older Nikon d5200 sits on my computer desk for the sole reason to shoot hummingbirds that frequent my Fuchsias. Haven't changed settings in over a month. It's turn on and shoot. Turn off till the next hummingbird comes by. The next series after this one was exposed correctly. Never saw anything like this and was wondering if anyone else has had this happen. Settings aperture priority - f5.6 - 1/2000 - ISO4000 - time 9:33 am

no adjustments
no adjustments...
(Download)

plus 4.00 exposure in Lightroom
plus 4.00 exposure in Lightroom...
(Download)

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Jun 1, 2015 11:45:17   #
SharpShooter Loc: NorCal
 
Wouldn't it depend entirely on what metering mode you used and then exactly what the camera metered on?
If you are on manual, YOU need to meter EVERY shot yourself.
No? ;-)
SS

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Jun 1, 2015 11:49:48   #
St3v3M Loc: 35,000 feet
 
Date Time Original: 2015:05:28 09:33:10
Exposure Time: 1/2000
F Number: f / 5.60
Exposure Program: Aperture priority
ISO Speed Ratings: 4000
Metering Mode: Pattern
Flash: Flash did not fire
Focal Length: 300mm
White Balance: Auto white balance
Model: NIKON D5200
Lens: 55.0-300.0 mm f/4.5-5.6

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Jun 1, 2015 11:57:04   #
rook2c4 Loc: Philadelphia, PA USA
 
Well, the settings certainly seem correct for a subject in daylight shade. I would guess that either the lens is malfunctioning, with the aperture closing down more than it should (for example, to f/22 instead of f/5.6), or the camera's ISO is not working right. Perhaps changing to another lens will fix the problem.

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Jun 1, 2015 12:23:06   #
b2bjacks Loc: Sequim, Washington
 
rook2c4 wrote:
Well, the settings certainly seem correct for a subject in daylight shade. I would guess that either the lens is malfunctioning, with the aperture closing down more than it should (for example, to f/22 instead of f/5.6), or the camera's ISO is not working right. Perhaps changing to another lens will fix the problem.


The problem came and went. It only existed for 12 out of several hundred shots. It is a Nikon lens on a Nikon camera.

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Jun 2, 2015 13:41:25   #
jimmya Loc: Phoenix
 
b2bjacks wrote:
Just uploaded a few hundred photos to Adobe Lightroom. And found about 12 that were very under exposed. Sample #1 is without any adjustments. Sample 2 is still a tick under exposed with a plus 4.00 exposure adjustment. This older Nikon d5200 sits on my computer desk for the sole reason to shoot hummingbirds that frequent my Fuchsias. Haven't changed settings in over a month. It's turn on and shoot. Turn off till the next hummingbird comes by. The next series after this one was exposed correctly. Never saw anything like this and was wondering if anyone else has had this happen. Settings aperture priority - f5.6 - 1/2000 - ISO4000 - time 9:33 am
Just uploaded a few hundred photos to Adobe Lightr... (show quote)


I would say based on your first photo's exif data the shutter speet at 1/2000 was too fast for the situation.

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Jun 2, 2015 17:51:43   #
singleviking Loc: Lake Sebu Eco Park, Philippines
 
rook2c4 wrote:
Well, the settings certainly seem correct for a subject in daylight shade. I would guess that either the lens is malfunctioning, with the aperture closing down more than it should (for example, to f/22 instead of f/5.6), or the camera's ISO is not working right. Perhaps changing to another lens will fix the problem.


I honestly don't think this problem is caused by the lens going to f/22 instead of f/5.6 since that would greatly increase the DOF and there seems to be quite a narrow DOF WRT the flower. This could be due to the exposure metering being incorrect because it's using the wrong portion of the image. Or another possibility is that the camera somehow expected a flash but it never came, but that would mean the exposure and other setting might automatically change from shot to shot and you stated this only occurs on some shots.
Just curious...are the photos that are exposed correctly showing the same settings in EXIF as those that are under exposed?

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Jun 3, 2015 10:29:20   #
rook2c4 Loc: Philadelphia, PA USA
 
singleviking wrote:
I honestly don't think this problem is caused by the lens going to f/22 instead of f/5.6 since that would greatly increase the DOF and there seems to be quite a narrow DOF WRT the flower. This could be due to the exposure metering being incorrect because it's using the wrong portion of the image. Or another possibility is that the camera somehow expected a flash but it never came, but that would mean the exposure and other setting might automatically change from shot to shot and you stated this only occurs on some shots.
I honestly don't think this problem is caused by t... (show quote)

I believe you are right about the DOF ruling out aperture closing down to f/22. On the otherhand, the settings as listed in the EXIF are consistent with proper exposure for a scene in daylight shade, which indicates the metering system was functioning correctly.

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Jun 3, 2015 12:29:12   #
b2bjacks Loc: Sequim, Washington
 
singleviking wrote:

Just curious...are the photos that are exposed correctly showing the same settings in EXIF as those that are under exposed?


This was right after or possibly in the same series.


(Download)

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Jun 3, 2015 13:06:51   #
singleviking Loc: Lake Sebu Eco Park, Philippines
 
b2bjacks wrote:
This was right after or possibly in the same series.


It's possible that your metering system just didn't center on the bird and somehow got confused when your problem of dark photos happens. STRANGE PROBLEM though. Maybe Nikonian or MTShooter has a better answer.

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Jun 3, 2015 22:33:39   #
corryhully Loc: liverpool uk
 
Is it possible you moved the exposure compensation by accident?

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