How does a mirrorless interchangeable lens camera work?

dslr camera lens wiki image

Jeffrey

When you remove the lens from an SLR, the mirror prevents light from exposing the film. I've never seen a DSLR, but I assume the mirror performs a similar function in them.

What blocks the light in a mirrorless interchangeable lens camera when the camera is off?

If you can include a link to a crosssectional diagram, that would be great. I couldn't find one with an image search.

Answer
I think you'll find that the mirrorless system has an electronic shutter and an electronic viewfinder as well. The mirror in a DSLR has nothing to do with the shutter... It flips up out of the light path just before the shutter opens. Most DSLR cameras (not all!) these days have focal plane (curtain) shutters - http://en.wikipedia.org/wiki/Focal-plane_shutter

How to use the removeable lens part of a digital camera? help please?

DetectiveB

I want a decent digital camera i've noticed some of the Canon or Nikon camera's lens project a great deal outwards... that part of the camera doesn't flatten back into the camera does it? do you have to buy that part separately ??... and are they difficult to use, do i need to have some kind of knowledge a degree in technology to be able to use one of them?

Answer
what is a dslr? http://en.wikipedia.org/wiki/Dslr and a buying guide. http://www.dpreview.com/learn/?/Guides/dslr_buying_guide_01.htm

Anyone with normal intelligence and willingness to learn can learn to use one of these in a few hours. Really mastering photography will take a lot longer.

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