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The screen on which the image entering a reflex camera is reflected on by a mirror. Multiple designs are generally available.

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18
votes
4answers
3k views

Why is the depth-of-field preview in the optical viewfinder of my Canon 500D inaccurate?

I have noticed that in my Canon 500D, the depth-of-field preview in the optical viewfinder is inaccurate with large aperture settings. If I press the DoF preview button, there is very little ...
35
votes
5answers
9k views

Why don't DSLRs come equipped with “classic” focusing screens (split prism, etc)?

I have a hard time manual focusing my Canon EOS 350D. Compared to the few higher spec DSLRs that I played with, and that have a pentaprism, my Rebel's (pentamirror) viewfinder feels crammed and ...
3
votes
4answers
346 views

Is it possible to get a larger screen for live view, for precise manual focus?

I've been doing some test macro shots lately and it's been a pain to focus sharp. The macro lens already minimizes DoF and makes things hard but I've been thinking of an external screen that I can ...
5
votes
3answers
5k views

Why do the focus points leds in my viewfinder appear shadowed?

The focus points leds (red colored ones), looks shadowed (smudged) in my Canon 550D. Not all points, but the bottom 3 points, when the light glows, looks kind of shadowed. I tried cleaning the both ...
7
votes
4answers
285 views

If I have a recent, mid-range DSLR, then why, if ever, would I need to buy another / better focusing screen?

In theory this question applies to other brands beside Canon, but I'm going by the Canon experience here. Namely: Why would I want to change a functional focusing screen with another one? And what ...
3
votes
2answers
508 views

Can a new focusing screen affect exposure metering?

After i replaced original focusing screen with a split one, it seems that every picture i take is overexposed now. Can it affect on exposure? Or i damaged something while replacing it? I own Nikon ...