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Feidb
super member
Reged: 10/09/09
Posts: 127
Loc: Nevada
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Has anyone had experience with these eyepieces? They are certainly the right price. Has anyone tried them in a fast system, say f/4.5? With 80 degree fields, how are the edges? I'm looking at the 20mm and 15mm. Appreciate any feedback.
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Present gear:
16" Meade LightBridge
Meade 50mm straight through-finder
Lumicon green laser pointer
Orion Q-70 26mm, 32mm, and 38mm
Parks 2X 2" Barlow
Hyperion 17mm, 8mm
1 1/4" 18mm Russell Optics Bertele
1 1/4" 12.5mm and 6mm Coulter Optical Orthoscopics
1 1/4" X 2" 32mm Edmund Scientific war surplus Erfle
Tirion star atlas (white stars, black background) hand-laminated
Megastar
And a partridge in a pear tree
To nudge or not to nudge, that is the question
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Lane
Carpal Tunnel
Reged: 11/19/07
Posts: 1515
Loc: Frisco, Texas
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Nope, but I would sure like to hear a review from someone that owns that 20. So if you get one please post the results of your testing.
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Mounts: CGEM, ORION SIRIUS, AT Voyager/motorized
SCTs: C6, C8, C9.25, C11,
Refractors: TV Pronto, Orion ED80
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Feidb
super member
Reged: 10/09/09
Posts: 127
Loc: Nevada
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Be glad to.
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Present gear:
16" Meade LightBridge
Meade 50mm straight through-finder
Lumicon green laser pointer
Orion Q-70 26mm, 32mm, and 38mm
Parks 2X 2" Barlow
Hyperion 17mm, 8mm
1 1/4" 18mm Russell Optics Bertele
1 1/4" 12.5mm and 6mm Coulter Optical Orthoscopics
1 1/4" X 2" 32mm Edmund Scientific war surplus Erfle
Tirion star atlas (white stars, black background) hand-laminated
Megastar
And a partridge in a pear tree
To nudge or not to nudge, that is the question
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tubehead999
member
Reged: 11/25/08
Posts: 35
Loc: Kennesaw, GA
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As far as the 20MM..... is nothing more than the 30MM MoonFish/1-RPD, etc, etc, with a 1.5X Barlow that screws into the tailpiece. The 30MM Moonfish is a gem of an el cheapo wildfield eyepiece....But, you will need a Paracorr with fast scopes and quite frankly, if you are a perfectionist with views at the edge of field , the eyepiece will not suit you at less than F/8. I have the eyepiece , many different vendors supply the same configuration , under different stencils. If your desire is for a 20MM eyepiece, then I would recommend the 21MM Hyperion....yes , 70 degrees isn't 80 degrees, but, I use my "20MM" as a 30MM and use the barlow as a cap to keep the dust out of the 30MM Moon Fish.....This is my opinion and of course, others will have different opinions. All of my scopes are F/4.5 to F/7.5. Good Luck.
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Bob Cromer
Founding Father...
RAAGU
Redneck Amateur Astronomers of Georgia, Unlimited
"Life is 2 short to take yourself 2 seriously"
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Feidb
super member
Reged: 10/09/09
Posts: 127
Loc: Nevada
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I tried the Hyperions and would have got a few except that because of the focuser travel, I still have to use a 1 1/4" adapter. My goal is all 2" and that doesn't fit the bill. However, good eyepieces. I'm still looking at the 19mm Celestron Axiom LX. It is over my budget, or what I think one should have to pay for an EP, but it seems to be a pretty good EP. Lots of choices but not many in my 20mm range that are in strictly 2".
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Present gear:
16" Meade LightBridge
Meade 50mm straight through-finder
Lumicon green laser pointer
Orion Q-70 26mm, 32mm, and 38mm
Parks 2X 2" Barlow
Hyperion 17mm, 8mm
1 1/4" 18mm Russell Optics Bertele
1 1/4" 12.5mm and 6mm Coulter Optical Orthoscopics
1 1/4" X 2" 32mm Edmund Scientific war surplus Erfle
Tirion star atlas (white stars, black background) hand-laminated
Megastar
And a partridge in a pear tree
To nudge or not to nudge, that is the question
|
Johndob
super member
Reged: 12/22/08
Posts: 146
Loc: Newport Beach,Ca
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I use a 35mm 2" extension to use my Hyperions in 2" mode, much more solid than 1-1/4".
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Zhumell 10" Dob (Mods)
ETX-125PE UHTC
ETX-90AT
6"f/5 Newtonian
Classic 60x910
Ortho 6-7mm UO or.4mm
Meade 3000 5mm
Zhumell 2" ED Barlow
Zhumell 2" 32mm
UO. 2" 30mm 
GSO 2" 26mm
GSO 40mm CPL
Hyperion 8,13,17,21&FTR
Zhumell 8-24 Zoom
ED 3.8mm,7.5mm
Owl SP4,10,15
Zhumell EP&filter set 1"1/4
Baader 2" Neodymium/IR-cut,CelestronUHC/LPR
Zhumell OIII,UHC,SkyGlow,Polarizer
Zhumell 20x80 Giant&
10x50 plus 3 More Bino's
Brunton Echo Monocular
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starrancher
professor emeritus
Reged: 06/09/09
Posts: 620
Loc: Northern Arizona
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Quote:
I use a 35mm 2" extension to use my Hyperions in 2" mode, much more solid than 1-1/4".
  
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LXD75 AR5
LXD75 SN8
Series 4000 Plossls
Misc. other stuff
Fort Rock , Az .
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Johndob
super member
Reged: 12/22/08
Posts: 146
Loc: Newport Beach,Ca
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Also, the 35mm extension tube is lighter than the solid stock adapter. The WS80 30mm Rocks 1.9 TFOV in z10 (>>>...<<<)
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Zhumell 10" Dob (Mods)
ETX-125PE UHTC
ETX-90AT
6"f/5 Newtonian
Classic 60x910
Ortho 6-7mm UO or.4mm
Meade 3000 5mm
Zhumell 2" ED Barlow
Zhumell 2" 32mm
UO. 2" 30mm
GSO 2" 26mm
GSO 40mm CPL
Hyperion 8,13,17,21&FTR
Zhumell 8-24 Zoom
ED 3.8mm,7.5mm
Owl SP4,10,15
Zhumell EP&filter set 1"1/4
Baader 2" Neodymium/IR-cut,CelestronUHC/LPR
Zhumell OIII,UHC,SkyGlow,Polarizer
Zhumell 20x80 Giant&
10x50 plus 3 More Bino's
Brunton Echo Monocular
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