Why is the body open?

Started Feb 9, 2013 | Questions thread
Lee Jay
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Re: Why is the body open?
In reply to Rexel99, Feb 9, 2013

Rexel99 wrote:

This applies to all removable-lens cameras (that I know of) but it just occurred to me...

Why is there a big hole in the body of the camera when you remove the lens?

Surely a piece of glass could be in that hole, in front of the mirror (behind the lens) to prevent dust getting in.

That would alter the optical formula of the lens, as that flat piece of glass would become part of the lens system.  In fact, some lenses have a flat piece of glass in the rear on purpose as part of the optical formula.

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Lee Jay
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