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What is the difference between a pentaprism and a pentamirror?
viewfinder - What does the pentaprism/pentamirror do?
Why a pentaprism and not a simple flat mirror? [duplicate]
How to clean the focusing screen? - Photography Stack Exchange
Pentaprism viewfinder and used "pro" gear - really better for …
How many times is the image inverted inside a DSLR camera?
Why don't DSLRs come equipped with "classic" focusing screens …
Where are the exposure sensors on a mirrorless camera?
Why is my Canon 7D light sensor under-sensitive?
Mirror vs Lens: do either or both invert the image?