Karl_Bonner_1982
sage
Reged: 05/13/09
Posts: 308
Loc: Springfield, Oregon (4.5ish ma...
|
|
I seem to recall seeing the two main belts at 25x through the 90mm Meade achro I borrowed. Wonder if it's possible to see them at even lower powers - say, 15x? That would put them just within the range of larger binoculars.
--------------------
A lot of signatures are just there because people think they are "supposed" to have a signature.
|
dyslexic nam
member
Reged: 01/28/08
Posts: 74
|
|
I have a pair of 15x70 celestrons, and I don't see the belts at that magnification. All I really see are the 4 jovian moons strung out nicely.
Cheers
|
RLTYS
Carpal Tunnel
Reged: 12/18/04
Posts: 2159
Loc: New York (Long Island)
|
|
Karl
Using a 76mm Celestron FirstScope f4 refl I have glimpsed Jupiters North and South Equatorial Belts at 63x.
Rich (RLTYS)
--------------------
10" F4.8 Refl.
4" F5 Refr. (Genesis)
3" F4 Celestron FirstScope
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
|
Reverie
super member
Reged: 03/27/08
Posts: 109
Loc: Lost in Translation
|
|
Quote:
I seem to recall seeing the two main belts at 25x through the 90mm Meade achro I borrowed. Wonder if it's possible to see them at even lower powers - say, 15x? That would put them just within the range of larger binoculars.
I have never seen Jupiter's belts with a pair of 15x70 binocular.
However with a 102mm refractor, at 20x I can notice the belts.
--------------------
There are observers observing the stars with their equipment, there are also observers observing their equipment with the stars.
|
starrancher
professor emeritus
Reged: 06/09/09
Posts: 620
Loc: Northern Arizona
|
|
50mm Tasco classic at 48x pulled it off .  Also showed the polar regions .
--------------------
LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
Edited by starrancher (10/31/09 11:09 AM)
|
Astrojensen
sage
Reged: 10/05/08
Posts: 219
Loc: Bornholm, Denmark
|
|
Guys, you're using way too much aperture for this kind of test. The reason it isn't possible to see the belts at 15x with a 15x70 binoculars is that the glare is so strong, the belts simply disappear. Try stopping down the scope or binoculars to 20 - 25mm (1") instead to lower the surface brightness to a more suitable level.
Clear skies!
Thomas, Denmark
|
Karl_Bonner_1982
sage
Reged: 05/13/09
Posts: 308
Loc: Springfield, Oregon (4.5ish ma...
|
|
Quote:
Guys, you're using way too much aperture for this kind of test. The reason it isn't possible to see the belts at 15x with a 15x70 binoculars is that the glare is so strong, the belts simply disappear. Try stopping down the scope or binoculars to 20 - 25mm (1") instead to lower the surface brightness to a more suitable level.
This is an interesting idea. For once, aperture may actually be working against us? (maybe that's the reason Jupiter looks so good through moderately small refractors!)
--------------------
A lot of signatures are just there because people think they are "supposed" to have a signature.
|
brianb11213
Carpal Tunnel
Reged: 02/25/09
Posts: 2121
Loc: 55.215N 6.554W
|
|
Quote:
This is an interesting idea. For once, aperture may actually be working against us?
Try observing in twilight; keep the aperture, lose the glare. Planets are always always sharper in bright twilight, to me. (There is often a "window" of relatively steady seeing, too.)
I've seen more than a hint of the two principal dark belts on Jupiter, in twilight, with nothing more than 10x50 binoculars (of impeccable quality).
|
cavefrog
sage
Reged: 11/11/08
Posts: 449
Loc: loozyanna
|
|
I have been using the small hole in the dust cover of my new
a80mf, and have been getting pretty good results with it. but I have been cranking up the power instead of sticking with this thread. (sorry had to do 'er) 
Theo
--------------------
I am only an egg
|
Shadowalker
Unpretentious Rocket Scientist
Reged: 11/23/04
Posts: 3560
Loc: Poplarville, MS, USA
|
|
I found that Jupiter appeared with better contrast when I stopped down my 8 inch F5 newt to about 4 inches. The longest EP I have is 28mm, giving 35x. I could see banding.
--------------------
Tom Nicolaides
http://www.first-light.org
My evil self is at that door, and I have no power to stop it
-- Dr. Edward Morbius
|
Sarkikos
Pooh-Bah
Reged: 12/18/07
Posts: 1075
Loc: Suburban Maryland
|
|
Don't stop down the scope. I never give back any of my aperture. You will lose resolving power. Use filters, instead. You will just lose some of the light. I like a green filter on Jupiter for the GRS and bands. #58 or #56 are good for an 8" or 10" Newt. IMHO, of course, and YMMV.
By the way, I could have sworn I'd seen the two equatorial bands on Jupiter through my 15x70 when I had it on a tripod. Not very clearly, of course, but I could tell they were there. Something to double-check the next time.
Mike
--------------------
Celestron 10" f5 Newt on 1stBase (DSO)
Zhumell 8" f6 Newt, Bosma 6" f12 MCT (NSO)
6" f5 Newt, 130ST, 4.5" f4.4 Ball w/GLP, ST80 w/Crayford (RFTs)
C4-R (NSO/DS)
90mm f13 MCT (Luna/DS)
SkyMaster 25x100, 15x70
Zhumell 20x80
Barska XWA 10x50, 8x40
OptiView LPR 10x50
Const View 2.3x40
BV-125C
CG5, 2 drv / CG4, 2 drv, wood legs, ScopeStuff saddle / CG3, 1 drv
SV AZ / 501HDV on Bogen 055XB / P+ on Oberwerk
QuikFinder, Telrad
Orion Dynamo Pro 12, Dew-Not
Have GLP and not afraid to use it!
|
starrancher
professor emeritus
Reged: 06/09/09
Posts: 620
Loc: Northern Arizona
|
|
I'll second the motion on the #56 & #58 Green filters For Jupiter .
--------------------
LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
|
Sarkikos
Pooh-Bah
Reged: 12/18/07
Posts: 1075
Loc: Suburban Maryland
|
|
Yessir. 
--------------------
Celestron 10" f5 Newt on 1stBase (DSO)
Zhumell 8" f6 Newt, Bosma 6" f12 MCT (NSO)
6" f5 Newt, 130ST, 4.5" f4.4 Ball w/GLP, ST80 w/Crayford (RFTs)
C4-R (NSO/DS)
90mm f13 MCT (Luna/DS)
SkyMaster 25x100, 15x70
Zhumell 20x80
Barska XWA 10x50, 8x40
OptiView LPR 10x50
Const View 2.3x40
BV-125C
CG5, 2 drv / CG4, 2 drv, wood legs, ScopeStuff saddle / CG3, 1 drv
SV AZ / 501HDV on Bogen 055XB / P+ on Oberwerk
QuikFinder, Telrad
Orion Dynamo Pro 12, Dew-Not
Have GLP and not afraid to use it!
|
starrancher
professor emeritus
Reged: 06/09/09
Posts: 620
Loc: Northern Arizona
|
|
Hey , I'm from Northern Arizona not San Francisco !... 
--------------------
LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
Edited by starrancher (11/05/09 12:27 PM)
|
Sarkikos
Pooh-Bah
Reged: 12/18/07
Posts: 1075
Loc: Suburban Maryland
|
|
The rainbow signifies color filters, no more, no less! 
--------------------
Celestron 10" f5 Newt on 1stBase (DSO)
Zhumell 8" f6 Newt, Bosma 6" f12 MCT (NSO)
6" f5 Newt, 130ST, 4.5" f4.4 Ball w/GLP, ST80 w/Crayford (RFTs)
C4-R (NSO/DS)
90mm f13 MCT (Luna/DS)
SkyMaster 25x100, 15x70
Zhumell 20x80
Barska XWA 10x50, 8x40
OptiView LPR 10x50
Const View 2.3x40
BV-125C
CG5, 2 drv / CG4, 2 drv, wood legs, ScopeStuff saddle / CG3, 1 drv
SV AZ / 501HDV on Bogen 055XB / P+ on Oberwerk
QuikFinder, Telrad
Orion Dynamo Pro 12, Dew-Not
Have GLP and not afraid to use it!
|
brmillsy
member
Reged: 07/29/09
Posts: 46
Loc: Wheatfield, NY
|
|
I've found that a blue filter is really helpful in bringing out the cloud bands. Some fairly amazing details in my 8" SCT at around 100X.
I have not tried green yet - will give it a go.
--------------------
Brian
--------------------
Nexstar 8SE
Plossols: 4mm, 6mm, 9mm, 15mm, 25mm, 32mm
Naglers: 5mm, 7mm
Ethos: 13mm
Denk Powerswitch (S1 shorty)
UHC filter, Moon filter, Colored filters
Dewshield, Powertank, 2X Barlow,
F/6.3 focal reducer, JMI motorfocus
|
Sarkikos
Pooh-Bah
Reged: 12/18/07
Posts: 1075
Loc: Suburban Maryland
|
|
brmillsy,
What Wratten number(s) for the blue filter? I've tried them all, not too bad, but green was better.
Mike
--------------------
Celestron 10" f5 Newt on 1stBase (DSO)
Zhumell 8" f6 Newt, Bosma 6" f12 MCT (NSO)
6" f5 Newt, 130ST, 4.5" f4.4 Ball w/GLP, ST80 w/Crayford (RFTs)
C4-R (NSO/DS)
90mm f13 MCT (Luna/DS)
SkyMaster 25x100, 15x70
Zhumell 20x80
Barska XWA 10x50, 8x40
OptiView LPR 10x50
Const View 2.3x40
BV-125C
CG5, 2 drv / CG4, 2 drv, wood legs, ScopeStuff saddle / CG3, 1 drv
SV AZ / 501HDV on Bogen 055XB / P+ on Oberwerk
QuikFinder, Telrad
Orion Dynamo Pro 12, Dew-Not
Have GLP and not afraid to use it!
|
brmillsy
member
Reged: 07/29/09
Posts: 46
Loc: Wheatfield, NY
|
|
Hi Mike:
The one I use is a number 80A. I used it again last night at length and also used numbers 56 and 58A green filters for the first time. The green helped a lot and clearly improved contrast of the bands.
To me though I found the blue to be better and I think the image is a little brighter and the bands stand out even better than the green. Just my opinion though.
Regards.
Brian.
--------------------
Brian
--------------------
Nexstar 8SE
Plossols: 4mm, 6mm, 9mm, 15mm, 25mm, 32mm
Naglers: 5mm, 7mm
Ethos: 13mm
Denk Powerswitch (S1 shorty)
UHC filter, Moon filter, Colored filters
Dewshield, Powertank, 2X Barlow,
F/6.3 focal reducer, JMI motorfocus
|
Previous
Index
Next
Threaded
Edit
Reply
Quote
