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Itz marcus
scholastic sledgehammer
Reged: 02/12/06
Posts: 907
Loc: Brooklyn NY
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Hi,
Does anyone know the optical quality (1/4 wave, 1/8 wave etc) of the Siebert Black knight 22mm ca Binoviewers. Also has anyone compared them to the Denk standards or Eathwins?
I know that the ca is smaller on the Siebert but other than that is the optical quality in the same league?
Clear Skies
Itz
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Eon 120 ED 
Stellarvue bv3
Gas is only worth it in the stars not at the pump
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Covey32
scholastic sledgehammer
Reged: 12/09/04
Posts: 921
Loc: Georgia
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I own both Sieberts and Denk Standards and the optical quality differences are minimal, if they exist at all.
Siebert advantage = very lightweight, good optics excellent product support.
Denk advantage = able to use powerx switch giving quick access to multiple magnifications, good optics, excellent product support.
I use the lighter Sieberts on smaller scopes and the Denks on larger scopes. The powerx switch is a deciding factor if weight is not an issue.
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Hank
12.5" Mag1 Portaball
Orion 120mm F5 Refractor
Skywatcher 120ED F7.5 Refractor
1982 Celestron C8 Orange tube
Celestron ED80 Refractor with Lunt 50mm HA
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LDb
professor emeritus
Reged: 02/01/08
Posts: 533
Loc: Cleveland, Ohio
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Hi
I have the Black knight 22 with the Power Mag Wheel. Harry Siebert's equipment is terrific and these two items together are excellent together.
Hope this helps.
Howard
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10" LX200R-UHTC (on ScopeBuggy which is terrific)
ETX-90-RA
ATM'ed-8"f/8 and 4.25"f/10 planetary Newtonians
Brandon eyepieces: 48mm,32mm,24mm,7/8",12mm,16mm,8mm,6mm,4mm (yes-4mm; special build in 1985 from 1960 optics)
Double set for binoviewing
Dakin 2.4x Barlow
Vintage ep's:
Gailand 7mm WF, 16.3mm (THE Galoc), Bertele 18mm
Siebert Optics:
Black Knight BinoViewer, 0.6x-1x-2x Power Wheel, 4x-8x telecentric zoom barlow
Astro-Tech Titan WF ep's: 38mm, 32mm, 26mm, 20mm, 15mm, 10mm
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Itz marcus
scholastic sledgehammer
Reged: 02/12/06
Posts: 907
Loc: Brooklyn NY
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Hi,
It sure does
Thanx
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Eon 120 ED
Stellarvue bv3
Gas is only worth it in the stars not at the pump
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Danno2006
professor emeritus
Reged: 01/25/06
Posts: 661
Loc: Ontario, Canada
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Quote:
I own both Sieberts and Denk Standards and the optical quality differences are minimal, if they exist at all.
Siebert advantage = very lightweight, good optics excellent product support.
Denk advantage = able to use powerx switch giving quick access to multiple magnifications, good optics, excellent product support.
I use the lighter Sieberts on smaller scopes and the Denks on larger scopes. The powerx switch is a deciding factor if weight is not an issue.
I agree and I have both. I use the Denk II with PS on my TEC140 and C14 while the BN works well with my Lunt 60mm due to its light weight.
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