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X-700 no focusing screen

Started Apr 11, 2018 | Discussions thread
sybersitizen Forum Pro • Posts: 24,269
Re: X-700 no focusing screen

neilt3 wrote:

I think rather than vignetting , when your looking threw the viewfinder ( without focus screen ) you might be just looking at the back of the lens ?

Seems reasonable.

Regards seeing an image , if you hold a lens in front of you , you will also see the distant scene clearly .

Not a projected image , just the same as peering through a telescope or microscope .

That's upside down when viewed directly but it gets inverted by the time it hits your eye through the camera's mirror and optical system. The main difference is that I can't really see any change in focus by racking the lens using just my eye whereas I did see at least some change when it was mounted.

I actually used an unimportant A-mount camera and a 50/1.4 lens for my test, and I kind of suspected the other plastic screen (with engraved markings) that I left in place could have helped form an image in some way. The focusing screen naturally suffered a couple of scratches by the time I got it back in place, so I don't want to repeat the experiment with my only X-700. Someone else will have to step up.

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