I might add that what I'm talking abuot, since I may have the terminology wrong, is that there is a sort of "double vision" when out of focus. As the two images come together, you have focus.
Also, can you tell me more about the lgiht loss over f5 and usability problems, or if that has been overcome by katzeye?
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Good screens: [a href=\"http://www.brightscreen.com/styles.html]http://www.brightscreen.com/styles.html[/url]
I use a brigthscreen in my Conatx645 and it's perfectly accurate.
From my point of view a screen like this is much better as live view especially for wider shots when the subject distance is just in front of infinity. For close shots and/or macro live view might be okay.
Actually it's not a "double vision", it's a split of the image and it's just in the center of the image.
Acording to the higher density of these screens there is some loss of light, yes. But in the center frame the image is brighter. You get used to it.
On the other hand the higher density is good. Better to judge about DOF when you press the control button.
You should know that spot metering could suffer when you replace the original screen. But center weighted should be fine.