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Hi @Simar78666,
Aside from what @uliwooly mentioned, are you using any covers and flash while taking photos? Try to remove any cover that you may have and make sure that your fingers are not in close proximity of the lens.
Also for good measure, try clearing data for the camera app. When you clear the app data you'll reset all the app settings, which in turn restores the original settings. Go to Settings > Apps > Camera > Clear data. Does that help?