If we talk about technicalities, there could be infinite reasons and causes behind un-sharp and unclear pictures. However, there's not always a technical reason behind every un-sharp or unclear picture. Sometimes, it is because of the poor handling of the camera, inappropriate camera settings or some kind of accidental issue. There are many of them. In the section below we would be talking about 5 such main reasons, we will also look into how to fix them.
Here they are:
Slow Shutter Speed:
If you are hand holding the camera and have a slow shutter speed, your picture will end up looking blur, unclear and unsharp. This is because, slow shutter speed requires your camera to be super still, which is actually not possible while hand holding. So, if you are shooting in slow shutter speed, make sure you mount your camera on a tripod.
Keeping Image Stabilizer ON while using a Tripod.
Yes, this too can cause un-sharp pictures. The Image stabilizing technique is meant to be used when you hand hold a camera. But, if you are mounting it on a tripod, make sure you turn of the Image Stabilizer. Many cameras do not have this issue but, in some cameras it is an issue.
Autofocus can fail in low light environments:
Don't always depend on auto-focus to set a focus for you. It may select a wrong focus in low light environments that does result in blur and un-sharp pictures.
Don't handhold your camera while shooting in night:
Shooting at twilight or night requires a long exposure and a slow shutter speed. If you are shooting at this time, make sure you mount the camera on a steady tripod instead of hand holding it. If you hand-hold, your picture will turn out to be blurred and un-sharp.
When there are too many things to focus, focus manually:
When there are too many planes of focus in your frame, your camera autofocus can go wrong and choose an incorrect focus. It is better to set focus manually and take all the guesswork out of the equation.