Greetings friend @rbalza79. Very good description of the optical system of the reflex camera, I love photography, and know the operation of the camera is very important to treat the light and make a good picture.
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Thanks friend @emiliomoron for your valuable support and extraordinary commentary, the study of light is wonderful where as we know it involves the formation of the images both in our retinas and in the artificial photosensitive devices present in the camera. Successes.