I don't know if I have done something wrong , but when I want to set aperture priority or shutter priority on my d5100, the images are all dark. In AUTO the pictures are great. If I turn the dial and pick an aperture , the pictures come out really dark. HELP !!!!!
In Aperture Priority mode, you are telling the camera that YOU want to control the blades that allow the light into the camera. A smaller number means the blades are open wider, thus letting more light in, while the shutter is open. A wider aperture (1.8) will have more out of focus than a smaller aperture (5.6).
In Shutter Priority mode, you are telling the camera that YOU want to control the length of time the sensor is exposed to the image. A faster shutter speed will let less light onto the sensor. 1/1000 is faster than 1/100, etc. A faster shutter speed will freeze motion, slower opens up the possibility of blur.
A third factor is the ISO sensitivity. ISO 100 needs to have more light or time to generate an image than ISO 800. The trade off is "noise" in the image as you raise the sensitivity of the sensor.
In Aperture Priority, the camera controls the shutter speed, In Shutter priority, it controls the aperture. ISO can be set to AUTO, or you can control it.
Take this opportunity and experiment so you can learn.
Take an "AUTO" mode picture. Review the image, and see what the camera chose as settings. Change to Aperture, and modify the setting by one click steps from what the camera chose. See what it looks like.
Then do the same for Shutter Priority.
All this will help you learn, so that you can see what effect each type of setting has.
It sounds like you may have inadvertently dialed in some negative Exposure Compensation.
Exposure Compensation is disabled in Auto exposure mode and only works in P, S, & A exposure modes and skews the meter in M exposure mode.
With the camera in A or S exposure mode check in the viewfinder the +/- Exposure Compensation Indicator (#13 on page 7 of the D5100 Users Manual) should be On and the amount of +/- Exposure Compensation should indicated in the info display (#23 on page 6 of the D5100 User Manual) (0.0 is Off).
Thanks for that. I did have too much exposure compensation dialed in. I've set it at 0. Am I right in thinking that when is A and S mode , that my d5100 is using the ISO that I have set and not auto selecting for me ??? If its not choosing ISO for me , when what would you recommend as a default. I've got it set at 400 ??? Any thoughts.
>Am I right in thinking that when >is A and S mode , that my d5100 is using the ISO that I have >set and not auto selecting for me ???
Yes! As long as you don't have the ISO set to Auto ISO.
>If its not choosing ISO for me , when what would you recommend as a >default. I've got it set at 400 ??? Any thoughts.
Personally I never use Auto ISO and always set the ISO as close to the base setting (The base ISO setting for the D5100 is ISO 100) as possible given the subject and ambient light conditions. I do this to maximize IQ (Image Quality) and Dynamic Range. That is not to imply that I don't shoot at high ISO settings because I with crank up the ISO as high as required when I have to. For example when shooting sports in a typical HS Gym. Even when shooting wide open with "Fast Glass" I often set the ISO to 6400 or higher in order to maintain a shutter speed fast enough to freeze the subjects motion.
Thu 03-Apr-14 06:26 AM | edited Thu 03-Apr-14 06:27 AM by sl01
>I am wondering if I should set the exposure compensation to >+.7 or something above 0. >Any thoughts ???
Sure, why not? Play with it, make some photos and see what happens. It' the easiest way to learn it.
If your photos are still very dark, even when you set +2 or so, probably there's something wrong with other settings. For instance when shooting indoors in S mode, at ISO100 and shutter 1/100s, you'll very likely get almost black photos.
There is no right or wrong answer. Some prefer a slightly brighter image, others prefer a slightly darker image. Exposure Compensation provides the means to adjust the exposure to your liking.
The Matrix Meter can be fooled into underexposing or overexposing depending on the brightness of the overall scene compared to the subject. This is where Exposure Compensation is very useful: If you use Matrix Metering and the background is very dark, adding some positive exposure compensation is usually required to nail the exposure. When using Matrix Metering and the background is very bright or back lighted, dial in some negative exposure compensation to prevent the subject from being a silhouette unless that it what you had in mind.