The traditional camera obscura has evolved to the selfie. Isn’t it? Now documenting your life has become quite easier. You can easily frame and preserve each and every moment of your life just by a single click of your finger.
But have you ever wondered that why do we get rectangular images if we have round lens? Of course, you know that camera lens is round. And the image? Is it round? No.
Putting an end to this curiosity
Actually, the camera doesn’t directly produce the image. Instead, the camera focuses the image on the film(in the case of the traditional camera) and on the image sensor(in the case of the newer digital camera). As the light bounces off the object, it enters the lens, which in turn, bends and focuses the image towards the film or the image sensor.
Discover more such interesting facts and the reasons behind. Why does the Indian ceiling fan have three blades?
The round lens serves its purpose in the best way possible by focusing. The camera makers evaluated it.(Wow!)Of course, the lens can be rectangular but round lens produced the best images. What about the film? It could have been round. But then the image would have been somewhat similar to the image that brought you here.
It would have limited your eyesight and would have seemed incomplete. Agree? And most of the surfaces are rectangular or square which is easier to construct. Another reason is that earlier films came in rectangular sets, you are aware of that.
Thus, the cameras followed the traditional rectangular shape along with the rectangular sensors. The round lens produces round images but those would have had irregularities or aberrations around the outer areas as compared to the inner areas. This is because light needs to bend more to reach the outer edges.
These mistakes are efficiently corrected with the help of rectangular sensors. Consequently, a round camera lens combined with rectangular sensors gives the perfect photographs by cropping out the best part of the image.
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