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04/13/2007 10:29:28 AM · #1 |
Looking at various SLRs, I see some have the option of replacing the focus screen. Nikon, for example, has one called a Katzeye or something like that.
What's that mean?
Thanks!
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04/13/2007 10:38:43 AM · #2 |
| I know some SLR's i believe the Pentax K10D you can not see the AF points through the viewfinder. They have an overlay that can be put in the viewfinder so you can see the points. Is this what your talking about. |
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04/13/2007 10:44:27 AM · #3 |
The 5D has these. You can get one that has grid lines for horizontal and vertical alignment. They have one you use just for manual focusing. The one that comes with the camera has a matt finish on it.
scroll down this list and you will see all the different types Canon has.
Message edited by author 2007-04-13 10:50:01.
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04/13/2007 10:45:19 AM · #4 |
replacing the focus screen can give you better manual focusing capabilities
using split prism & micro prism it is easier to visualize
though it doesn't work well slow lenses !! one half of the prism may go black ..
it does not effect AF points or lcd markings in the view finder
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04/13/2007 10:50:00 AM · #5 |
Thanks for the details about what it can do for you.
But what IS it? An overlay on your viewfinder, as RainMotorSports thinks? Or something you somehow insert into the body? Something else?
Message edited by author 2007-04-13 10:50:30.
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04/13/2007 10:51:17 AM · #6 |
Originally posted by levyj413:
Thanks for the details about what it can do for you.
But what IS it? An overlay on your viewfinder, as RainMotorSports thinks? Or something you somehow insert into the body? Something else? |
It goes in the body where the mirror is
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04/13/2007 11:01:26 AM · #7 |
Above the mirror in the body there is a little latch that you can drop down to remove the screen.
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04/13/2007 11:42:32 AM · #8 |
It's a small piece of "ground glass" (actually they're precision machined , but essentially the same thing) that the lens focuses the image on. Think of it as the screen in a rear projection video system. The lens essentially projects the image onto it and when you look through the finder, that's what you see.
Different screens have different markings and functions. There are split prisms, matte prisms, grid prisms, and, if you want, you can have custom screens built. Beattie used to make them for film cameras, but I dunno if they're still around
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04/13/2007 11:54:16 AM · #9 |
It is good news to learn that microprism and split image focusing is FINALLY coming to digital SLRs. Without them manual focus with digital SLRs is still very difficult, particularly under low light level conditions where autofocus has problems anyway.
Personally, I prefer to do my own focusing rather than let the camera decide it for me. It makes mistakes.
In my opinion one of the great losses brought on by autofocus lenses durng the rise of digital SLRs is the loss of manual focusing aids within the viewfinder. At one time that was a primary feature of SLR cameras. It is nice to see that coming back.
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04/13/2007 12:10:11 PM · #10 |
| Anyone have images of these things. This thread really has me curious. |
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04/13/2007 01:22:14 PM · #11 |
Here they are at BH..
B&H Photo
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