Even with correct exposure, photos can still be lacking if it is blurry and not "sharp". Reasons that a photo is blurry include:
- subject is not in focus
- camera shake - especially for slow/long shutter speeds
- motion blur - subject moving too rapidly for the given shutter speed
Low light action photos:
- need high enough shutter speed to not get motion blur. 1/320 second for dance minimum.
- To get the fast shutter speed, the largest aperture (smallest f/stop number) available is likely required.
- Depending on the available light (and the lens), photos with 1/320s shutter speed and the largest aperture setting can be severely underexposed.
- If underexposed, increase the ISO to make the camera more light sensitive to get the "correct" exposure with the understanding that there is more "noise" with higher ISO settings.
Kit Chow, Jakrel Photography