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NoiseJammer
sage
Reged: 09/16/07
Posts: 235
Loc: Gone walkabout
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Hi All
The clouds cleared a day or so before first quarter. I was observing the southern highlands when a strange thing happened - suddenly the craters looked like flat topped hills and their rims became gullies between them.
I thought this can't be right, looked at where the sun was coming from and instantly they were the right way out. Ok, I thought, I remember that the astronauts were told to always take the position of the sun into account, so maybe this was why.
Anyway, I had another break a couple of nights back and was able to flip back and forth between crater and hill just by convincing myself that the sun was coming from the other side. It was weird. It was also my first honest case of 3D visualisation with a binoviewer.
If it matters, I was observing with a 6" Tak, TOA 1.6x extender, Maxbright, Denk II and 10mm ZAO-II's. Roughly 200x I guess.
Clearest
Bruce, Toronto
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178 square inches of mostly shiny glass, one biph
... and way, way too much light polution.
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GlennLeDrew
Carpal Tunnel
Reged: 06/18/08
Posts: 1631
Loc: Ottawa, Ontario, Canada
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Many times over the years I've momentarily done just such a mental reversal when looking at close-up photos of the Moon, including some taken by Apollo astronauts from orbit.
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Home-made 11X50 right angle bino, 8.1 deg. FOV
Modified 26X100 bino, 3.5 deg. FOV
Home-made Mk II RA bino, using interchangeable objectives and eyepieces
My Gallery (mostly DIY stuff)
Simple minds discuss people. Good minds discuss events. Great minds discuss ideas. - Hyman Rickover
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john 127
member
Reged: 01/17/08
Posts: 36
Loc: Napa, CA
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Hi Bruce,
Don't worry, your not alone. Just as some people complain about not being able to merge certain objects, you and I probably "merge too well". At high power it's not likely that even the best binoviewer and EP's are going to get the two images in exactly the same place on each retina. The brain understands that it's still the same object even though it's getting signals that indicate their are two objects at slightly different positions.
Recently I've developed a problem similar to yours. When I use my BV for low power bionviewing of trees in our creek I will often see branches that appear to be floating in space in front of other trees. When I close one eye I immediately see that they are slightly out of focus branches behind the larger trees and somehow my brain is assuming they are in front of the trees and hence they appear to be floating in space. If I view this way for a little while I get dizzy when I walk away from the telescope and see things a little "different" for a minute or two.
Anyway, if this continues to be bothersome you can send me your ZAO-II's and I'll give you a pair of my banged up plossls and I'm sure the problem will go away!
John
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AP 155
Obsession 18
Mewlon 250S
NP 127is
SV 90
AP-900
DM-6
Baader Mark V
Wonderful wife and two cats (see above)
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Fred1
Pooh-Bah
Reged: 09/19/07
Posts: 1044
Loc: Garnet Valley, Pennsylvania
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This happens to me, too, but only at high power. The cure? I look away for a few seconds and whe I look back into the binos all is well. Odd thing, it doesn't happen around the mares, just the highlands.
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Fred
Celestron 11" EdgeHD, Celestron 8" SCT both w/Starlight Feathertouch Microfocuser;
Stellarvue SV80ST Triplet APO
Tele Vue Bino Vue, Earthwin Optical and Stellarvue BV3 Binoviewers
CGEM, CG5-ASGT, Astro-Tech Voyager mounts
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Nathan F
sage
Reged: 10/10/08
Posts: 291
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Quote:
Hi All
The clouds cleared a day or so before first quarter. I was observing the southern highlands when a strange thing happened - suddenly the craters looked like flat topped hills and their rims became gullies between them.
I thought this can't be right, looked at where the sun was coming from and instantly they were the right way out. Ok, I thought, I remember that the astronauts were told to always take the position of the sun into account, so maybe this was why.
Anyway, I had another break a couple of nights back and was able to flip back and forth between crater and hill just by convincing myself that the sun was coming from the other side. It was weird. It was also my first honest case of 3D visualisation with a binoviewer.
If it matters, I was observing with a 6" Tak, TOA 1.6x extender, Maxbright, Denk II and 10mm ZAO-II's. Roughly 200x I guess.
Clearest
Bruce, Toronto
You'll like this then: http://www.michaelbach.de/ot/sze_silhouette/index.html
I spent 10 minutes arguing with my S/O that the woman was rotating a different direction until it switched before my very eyes. Now, I can sort of cause the shift myself back and fourth if I concentrate enough.
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12 inch f/5 Deep Space Observer Dob
31mm Nagler, 13mm, 6mm Ethos, 1.6x Antares 2 inch Barlow
Celestron SkyMaster 15x70 Binoculars
Homemade Maple Parallelogram Binocular Mount
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