A photo of a lens-shutter camera?

A compact 35 mm, automatic focusing camera of the lens shutter type includes a camera body having a camera obscura with a fast opening cartridge receiving and spool accommodating chambers on...

They both use convex lenses and they dsend signals to each other just like the brain.

In 35mm or digital camera there is a type of shutter or lens that controls how the outcome of the image is. These two things are very important in how the images exposure, depth of field, clarity or...

to avoid dust an decrease reflection

Exposes the film or digital sensor to light projected from the lens of your camera for a given duration. This can be anywhere from 1/4000 seconds to 30 seconds, depending on your camera.