by Jakub

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By "internal automatic eyepiece cover" I assume you mean something to block the light instead of something to protect the eyepiece glass from scratches. There are no cameras with an "Automatic Eyepiece Cover" but some Pro level cameras have a manual eyepiece shutter to block off light during long exposures when your eye is not covering the viewfinder. ...


Because it would add expense and complexity, and most consumers don't request it.


You can get some general figures in the 60–80% range by looking up transmission rates of materials like frosted glass. DSLRs often use laser-etched glass that may have higher transmission. But a camera is not like a set of binoculars. A DSLR lens focuses light onto the focusing screen (when the reflex mirror is down), and the viewfinder flips the image ...

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