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06-01-2015, 08:35 PM
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#41
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Rivet Master
2015 27' FB Eddie Bauer
2011 25' FB Flying Cloud
Fernandina Beach
, Florida
Join Date: Sep 2013
Posts: 629
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Just like Airstreams, there can be benefit in buying scopes and astronomy gear that has been gently used. Most amateur astronomers take excellent care of their equipment. The best place to find used astronomy equipment is AstroMart.com. I'm not affiliated, but have bought and sold hundreds of items there. Regards, Joe
Sent from my iPhone using Airstream Forums
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06-01-2015, 08:47 PM
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#42
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4 Rivet Member
Durango
, Colorado
Join Date: Jan 2014
Posts: 426
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Quote:
Originally Posted by Ahab
Williams Optics WO 71 ED.
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No, not in the same class as a Televue APO, just ED glass not true 1/4 wave apochromatic like the Televue.
I doubt you can do better than Televue glass and optic designs from Al Nagler.
However an expensive apochromatic may not be your best option. A lot depends on what you want to do. If you just want to star gaze, then astro-binoculars are a better choice. If you want to do astrophotography then you will need to spend more money on the mount. Mounts are most important for photography.
If you don't care about portability and astrophotography then a dobsonian reflector is your best bang for the buck.
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06-02-2015, 09:05 AM
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#43
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Rivet Master
2008 22' Safari
Oracle
, Arizona
Join Date: Oct 2007
Posts: 1,174
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Quote:
Originally Posted by RVDreamer
No, not in the same class as a Televue APO, just ED glass not true 1/4 wave apochromatic like the Televue.
I doubt you can do better than Televue glass and optic designs from Al Nagler.
However an expensive apochromatic may not be your best option. A lot depends on what you want to do. If you just want to star gaze, then astro-binoculars are a better choice. If you want to do astrophotography then you will need to spend more money on the mount. Mounts are most important for photography.
If you don't care about portability and astrophotography then a dobsonian reflector is your best bang for the buck.
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Having compared a Televue TV76 with the WO 71 ED at a star party made me choose the WO. Definetly the same or slightly better view.
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06-10-2015, 12:58 PM
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#44
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Rivet Master
2021 25' International
Full timer
, Virginia
Join Date: Oct 2012
Posts: 665
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not to tangent too badly off of equipment, my thoughts turned to red filters on our puck lights and the best way to go about it...
I know how to remove the puck light holder to get at the lens -- I am curious as to how soon, doing that regularly (3+ x a month,) would I wear out the brackets. Has anyone done this routinely to prep their TT for star parties or private viewing nights? Any suggestions where to find either pre-made red puck lenses or a suitable material (guessing simply red film and wrap the existing lens, hoping the LEDs don't produce enough heat to melt or burn the result...)
The "wall sconce" lamps I can just get straight forward red LEDs for and change those out on demand. Indeed, it may be easiest to do that, and maybe the stove fan light as well and call it that, not turning any other lights on during the viewing schedule... maybe a red nightlight in the bathroom.
Finally, anyone go so far as to install LEDs and switches capable of producing a variable color spectrum? Ultimately that would seem best; that for star parties I can do pure red throughout the TT, for other times pure/soft white as needed and in the post-sunset light with absence of blue to not throw off my diurnal rhythms...
cheers, thanks,
Ian
__________________
2024 Airstream Globetrotter 30RB
2022 Ford F350 Lariat Diesel
WBCCI 4CU 8118
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06-10-2015, 02:11 PM
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#45
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4 Rivet Member
Durango
, Colorado
Join Date: Jan 2014
Posts: 426
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Quote:
Originally Posted by Ahab
Having compared a Televue TV76 with the WO 71 ED at a star party made me choose the WO. Definetly the same or slightly better view.
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For visual you might not see that big of a difference (depends on your vision).
However if you do any astrophotography, you will immediately see the difference. ED glass in a refractor is not a true apochromatic refractor. Only a true apochromatic refractor will bring different wavelengths of light into focus.
If your eyes are color sensitive you will see purple & yellow fringes of color around bright objects. Cameras will pick up even more color fringing.
The added cost of the Televue is due to it being much more complex to create a true apochromatic lens. All EDs will be cheaper.
This has nothing to do with Televue vs Williams vs AstroPhysics vs Celestron.
This has to do with Apochromatic lens vs non-apochromatic lens.
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06-11-2015, 11:12 AM
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#46
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3 Rivet Member
2005 28' International CCD
San Jose via Winnepeg, Toronto, Orlando, Saratoga and Groton
, California
Join Date: Oct 2005
Posts: 100
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Red Lights in the Airstream
Quote:
Originally Posted by IanPoulin
not to tangent too badly off of equipment, my thoughts turned to red filters on our puck lights and the best way to go about it...
I know how to remove the puck light holder to get at the lens -- I am curious as to how soon, doing that regularly (3+ x a month,) would I wear out the brackets. Has anyone done this routinely to prep their TT for star parties or private viewing nights? Any suggestions where to find either pre-made red puck lenses or a suitable material (guessing simply red film and wrap the existing lens, hoping the LEDs don't produce enough heat to melt or burn the result...)
The "wall sconce" lamps I can just get straight forward red LEDs for and change those out on demand. Indeed, it may be easiest to do that, and maybe the stove fan light as well and call it that, not turning any other lights on during the viewing schedule... maybe a red nightlight in the bathroom.
Finally, anyone go so far as to install LEDs and switches capable of producing a variable color spectrum? Ultimately that would seem best; that for star parties I can do pure red throughout the TT, for other times pure/soft white as needed and in the post-sunset light with absence of blue to not throw off my diurnal rhythms...
cheers, thanks,
Ian
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Ian, I think you don't need to convert very many lights, and there are enough on the TT to allow for both white and red. My practice is not to continually replace the lights, but put red filters into the reading lights only. if I need to use the table I would use a red flashlight. I don't have LEDs, but they have not got too hot - the original lens I think is plastic anyway.
As for lighting, I use a red LED variable light form Orion, and for the red filter material I use SOLYX: SXP-RC300 Medical from decorative films. 1x or 2x thickness and you have an awesome dark adaption saving light level.
Bathroom - I guess you bring a red flashlight.
__________________
2005 28' CCD International
2x120W Solar Panels/22A GoPower Controller
1200# Equalizer Hitch
2007 GMC Yukon XL SLT
"Where are my keys?"
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03-31-2016, 10:47 AM
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#47
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Rivet Master
1977 Argosy Minuet 6.0 Metre
Colorado Springs
, Colorado
Join Date: Dec 2003
Posts: 739
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Sometimes the search feature does work! I was wondering how many astronomers armature or professional there might be on the forums. Been wanting to get a good scope for a long time but cash and time just didn't justify a purchase. Then I find that good Dobsonians are now available at a reasonable price and I do have the time to camp in the dark areas sometimes! After spending days on the web looking at scope reviews and recommendations, lots of good reviews here http://www.scopereviews.com/ I made a purchase. Bought a Zhumell Z12, it should be here today.
__________________
Royce (K0RKK) 146.460 simplex
Web page https://spearfishcreek.net/
AIR# 3913
'77' Minuet 6 Metre, behind a 2005 stock Jeep Rubicon with Equa-L-Zer hitch.
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04-03-2016, 07:18 PM
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#48
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Rivet Master
2021 25' International
Full timer
, Virginia
Join Date: Oct 2012
Posts: 665
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Wow -- solid tube -- THAT's going to take up some truck bed space . One reason I go with a truss system; stores compact. BUT -- that is a VERY nice price on a scope. Are you going to drop it onto an equatorial mount at some point for drive tracking?
__________________
2024 Airstream Globetrotter 30RB
2022 Ford F350 Lariat Diesel
WBCCI 4CU 8118
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04-04-2016, 09:01 AM
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#49
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Full Time Adventurer
2007 27' International CCD FB
Nomadic
, USA
Join Date: Jul 2013
Posts: 2,748
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Wow nice!
__________________
Family of 5 exploring the USA with a Ram Power Wagon & Airstream in tow.
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