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Ouranos
sage
Reged: 11/07/06
Posts: 328
Loc: Illinois
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I was looking at Jupiter through my Baader Hyperion 8mm in my Stellarvue 80mm Nighthawk. It produced the effect of a fog or haze or dew-like appearance around Jupiter. The ep and the scope were both dry and I do not get the same effect in my 10" dob. Any suggestions?
Paul
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East/Central Illinois
Orion XT10
Orion ST120
SV Nighthawk 7
Edited by Ouranos (08/04/08 03:41 PM)
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jrbarnett
Carpal Tunnel
Reged: 02/28/06
Posts: 2690
Loc: Petaluma, CA
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Did you happen to try out any other eyepieces after you noticed this? If not, I would try again on another night and see if I noticed this effect in the 8mm Baader. If so, I woul swap between it and a few other eyepieces of similar focal length. If all produce the effect, then the issue lies with the atmospheric and climate conditions or with the scope.
I have an 8mm Hyperion that I use exclusively in a 10" Dob, and I've never noticed any haloing issues, but in the Dob I mostly view DSOs, so may not have had any targets bright enough to yield the effect.
Regards,
Jim
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"The Cosmos is all that is or ever was or ever will be. Our feeblest contemplations of the Cosmos stir us — there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, of falling from a height. We know we are approaching the greatest of mysteries." - Carl Sagan
Edited by jrbarnett (08/04/08 04:59 PM)
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BillP
Carpal Tunnel
Reged: 11/26/06
Posts: 2240
Loc: Vienna, VA
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As strange as this sounds, I've had this effect happen to me and it resulted from a small light dew occuring on only a portion of the eyepiece's eye lens -- caused I presume by my eye's/body's heat. The strange part of this is when it was caused by a build up of fluid hanging down from my eye if I've kept my eye open too long and some excessive tearing resulted. In the 1st case a quick fan with my hand of the top lens made it go away. In the second case I closed and rubbed the excess tear buildup from my eye and the effect went away.
So perhaps one of these phenomenon. Otherwise all my Hyperions worked the same in my XT10 vs ZS66SD.
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250mm f/4.7 Orion XT10i Dobsonian
102mm f/8.0 Tak TSA Super-APO
66mm f/5.9 WO ZenithStar SD APO
40mm f/10 Coronado P.S.T.
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jrbarnett
Carpal Tunnel
Reged: 02/28/06
Posts: 2690
Loc: Petaluma, CA
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Bill:
Yup. I have seen this effect in many eyepieces when they dew up from eye heat, but the OP says the eyepiece and scope were dry so I didn't think to mention the possibility of dewing.
Regards,
Jim
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"The Cosmos is all that is or ever was or ever will be. Our feeblest contemplations of the Cosmos stir us — there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, of falling from a height. We know we are approaching the greatest of mysteries." - Carl Sagan
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Ouranos
sage
Reged: 11/07/06
Posts: 328
Loc: Illinois
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Hmmm. I think I shall try the combo again (Nighthawk and 8mm) Just before taking the scope out, I was wrestling w/ my 12 year old, something dangerous for a 50 year old! I was hot and so was the night. Perhaps I did not look closely enough at the ep. Thanks,
Paul
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East/Central Illinois
Orion XT10
Orion ST120
SV Nighthawk 7
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Brooklyn
scholastic sledgehammer
Reged: 07/24/08
Posts: 870
Loc: Central New Jersey
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Quote:
I was looking at Jupiter through my Baader Hyperion 8mm in my Stellarvue 80mm Nighthawk. It produced the effect of a fog or haze or dew-like appearance around Jupiter. The ep and the scope were both dry and I do not get the same effect in my 10" dob. Any suggestions?
Paul
DO NOT WORRY!!
Just yesterday, on my 8" sct i saw the same spherical haze coming from jupiter as well.
I suspect it comes from either our own body/eye heat, or atmospheric conditions. Maybe both?
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Meade 8.25"(209.55mm) LX-90 EMC (SCT)
Albert Einstein =>
“Intellectual growth should commence at birth and cease only at death.”
“If you can't explain it simply, you don't understand it well enough.”
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Mr. Mike
scholastic sledgehammer
Reged: 11/08/05
Posts: 858
Loc: Churchville, NY
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Quote:
I was looking at Jupiter through my Baader Hyperion 8mm in my Stellarvue 80mm Nighthawk. It produced the effect of a fog or haze or dew-like appearance around Jupiter. The ep and the scope were both dry and I do not get the same effect in my 10" dob. Any suggestions?
Paul
I saw this with my Nighthawk 80mm ED and a Nagler 5mm T6. I believe that dew is a factor.... but I also am starting to believe that the super-wide high-power EPs are more prone to this affect due to the plethora of glass in them. I dunno... just a hunch.
Im going to try out Jupiter with a UO ortho and see what happens. I wonder if I'll get the same effect??? 
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Stellarvue NG 80mm ED
Meade 7x50 Binos
Pentax XW 5mm
Meade 5K UWA 8.8mm
Vixen LVW 13mm
Vixen LVW 22mm
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NGC6144
member
Reged: 07/24/08
Posts: 47
Loc: Virginia Beach, VA
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my 8mm hyperion does that a bit in my 10 inch on really bright objects. for deep sky its perfect.
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Orion Skyquest XT10i w/telrad
21mm Hyperion
8mm hyperion
Messier objects observed this year:65
caldwell objects observed this year:10
Herschel 400 objects this year: 9
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bbcoltrane
journeyman
Reged: 05/07/08
Posts: 5
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I've had the same problem with my Antares 5mm Plossl and my Meade QX 15mm w/a 2.25x barlow. Both are similar magnification with my 5" Achromat, but the QX has a greater FOV, which helped me figure out what was happing here.
I don't believe it's dew or moisture. What I've noticed is that the bright Jupiter disc actually reflects off of my own cornea and back onto the EP glass. If I keep Jupiter off center in the EP, the affect goes away. But, if I center Jupiter and move my eye around, I notice that when the reflection converges with the disc, the haze appears. The 5mm Plossl has such a small opening that I can't really get Jupiter off center enough to negate the affect, so the EP is kind of useless (same problem with Saturn & Mars @ opposition)
So, the real question here is... what EP's have better anti reflective coatings on the top glass?
I'm thinking of posting this as another thread to get more feedback.
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RussL
Music Maker
Reged: 03/18/08
Posts: 1603
Loc: Cayce, SC
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Quote:
the bright Jupiter disc actually reflects off of my own cornea and back onto the EP glass.
That is a very good theory! I'd like to hear more discussion on it.
Something I've had happen is to see foggy-looking smears. The linear aspect didn't move when I rotated the eyepiece or diagonal. Come to find out that Jupiter had wandered into the needles of the nearest pine tree. 
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--Russell
"Akita mani yo." Observe everything as you walk. (--Lakota)
Celestron Celestar 8 Standard SCT, f10
Celestron 80mm Wide View ref., f5
Criterion RV-6 Dynascope, Newt., f8, (c. 1962)
Sears Discoverer 60mm ref., f7, (c. 1973)
Celestron Ultima DX 10x50, 6.5 TFOV
Tasco 7x35 wide
Several mediocre eyepieces
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