Small mineral sample shot with a 7.5x Mitty @ 7.5x in APS-C crop mode.
Mixite
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Another stereo pair that i can see properly.
I have so much trouble over the years trying to resolve all the stereo shots posted in the forum.
now I seem to be getting able, to resolve certain shots, but not all?
still wondering, had eyes checked out, new glasses prescribed so it could be the reason, just a guess on the last part.
any one else have trouble with some stereos and not others?
I have so much trouble over the years trying to resolve all the stereo shots posted in the forum.
now I seem to be getting able, to resolve certain shots, but not all?
still wondering, had eyes checked out, new glasses prescribed so it could be the reason, just a guess on the last part.
any one else have trouble with some stereos and not others?
used to do astronomy.
and photography.
Zeiss Universal Phase contrast.
Zeiss PMII
B&L stereo zoom.
and photography.
Zeiss Universal Phase contrast.
Zeiss PMII
B&L stereo zoom.
- rjlittlefield
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Nicely shot -- and of course thanks for the stereo!
Easiest are the ones that have lots of fine sharp detail, like this scene.
I usually push my own stereos to the edge of over-sharpening, just because they lock up best that way. I figure that even if I do over-sharpen the stereos by a bit, that's no big deal because they're usually presented together with a larger single image of the same subject, which is sharpened differently for that presentation.
--Rik
I can lock up pretty much anything, but some are easier than others.grgh wrote:any one else have trouble with some stereos and not others?
Easiest are the ones that have lots of fine sharp detail, like this scene.
I usually push my own stereos to the edge of over-sharpening, just because they lock up best that way. I figure that even if I do over-sharpen the stereos by a bit, that's no big deal because they're usually presented together with a larger single image of the same subject, which is sharpened differently for that presentation.
--Rik
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- iconoclastica
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I can't see this one. Actually, I can do very few. Often when I can see depth in a pair, the other pairs of the same maker work for me too.grgh wrote:any one else have trouble with some stereos and not others?
Also noticed that on a tablet screen it is less difficult than on the computer monitor.
--- felix filicis ---
In my experience two factors determine the difficulties involved in stereo gazing:Iconoclastica:
grgh wrote:
any one else have trouble with some stereos and not others?
I can't see this one. Actually, I can do very few. Often when I can see depth in a pair, the other pairs of the same maker work for me too.
Also noticed that on a tablet screen it is less difficult than on the computer monitor.
1) The apparent angle between the center of the two pictures: this is a combination of the width of the pictures and the viewing distance. Narrow pictures and/or greater viewing distance makes it easier.
2) The distribution and number of distinct details: The eyes should be able to identify at least one distinct detail/object in each picture even when it is somewhat out of focus.
That makes viewing the 3D picture difficult if:
a: There are only details with low contrast
b: There are many different details in each picture looking the same when out of focus
c: There is a pattern of distinct details repeated with equal horizontal ditances.
Our brain must be able to pick a detail in one picture and match it with he same detail in the other picture to get the eyeball pointing correct.
That is why it helps adding a contrasty border around each picture. Then the brain can choose to get at least the frames correctly aligned. Then the rest comes easily.
Troels Holm, biologist (retired), environmentalist, amateur photographer.
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