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A camera functions similar to a Human Eye. If the eye lens and retina of human eye are not aligned at proper focal length and distance, the image processed by the human brain will be blurry and distorted. Since human eye cannot be corrected by itself, we use various eye glasses/contact lens and laser operations to correct the alignment. Similarly the camera's sensor and lens are aligned in many methods to get desired high quality output and image.
In this paper we discuss about the issues that result due to improper sensor and lens alignment in the camera. The improper sensor and lens alignment leads to distorted image and difficulty for the user to capture the perfect image. We further discuss about different methods by which these sensor are aligned in compact camera(fixed lens) and bigger Movie cameras( interchangeable lens).