Possible that you gat a slow shutter speed. Or your camera might be getting faulty. When the shutter gets damaged then the blurry focus wont change unless its fixed. The four main causes of blurry photos are:
- Out Of Focus
- The subject moves while the shutter is open
- The camera moves while the shutter is open
- Depth Of Field is too shallow
Unless its just technical or hardware you will need to visit a technician. or replace the Shutter.
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