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Thank you for visiting Siebert Optics!
200 Short Johnson Road
Clayton, NC
USA 27520
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Products:
Adapters - Meade Scopes and ETX
Barlow Lenses Zooms and PW Wheels
Observers Hood - light blocking
Ladies Corner
Astronomy Themed Fleece Blanket
Non-Astronomy Items
40mm and 45mm. The only ones in their class and part of the Elite series of binoviewers.
Review links for 2" binoviewer
View 2" Binoviewer Comments
Submit your 2" binoviewer reviews.
Click on links below to read more Reviews on the 2" Black Night Elite Binoviewers
http://www.astromart.com/articles/article.asp?article_id=143
http://www.astromart.com/forums/viewpost.asp?forum_post_id=249468&poll_id=&news_id=&page=
http://www.astromart.com/forums/viewpost.asp?forum_post_id=256137&poll_id=&news_id=&page=
Cloudy Nights review for the 2 " binoviewers.
Click Here for Elite 1.3x-2.7x Universal OCA Instructions
Instructions for Diopters style eyepiece holders low profile 2" to 1.25" adapters
45mm with Double Diopters (Click On Picture)
Click on pictures to enlarge
The
40mm sized
up next to one of the biggest and best 1.25" units.
Click on pictures to enlarge
It is very hard to duplicate the effect you get when you look through a 2" Binoviewer and the 36mm's as seen here but than again the Black Knight was always the one to beat.
35mm, 40mm and 45mm diagonal Modification.
<Click
Picture
This mode is an extra $150 and makes the Echelon and Elite 2" binoviewers interchangeable with a 2" diagonal eyepiece holder similar to the AP Baader with it's T-2 system. The 2" nose piece threads in place for normal use in a dob or unmodified diagonal.
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Specifications at a Glance:
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Pricing Below |
Do
you want to see what More Clear Aperture can do for your binoviewer. Click
here!
The use of first surface diagonal mirrors will eliminate almost any possibility of reflections that prisms can create and also greatly reduce aberrations. These units have the spec's to outperform any bino in planetary and deepsky use. Try a set of my 2" 34mm or 2" 36mm 70 deg observatory series eyepieces for the ultimate DS view. Low mag correctors in the 1.3x, 1.5x and 1.8x range are available. Add diopters for fine focusing.
Is
it a heavy unit? Not in the least. And the
Accessories are also light. Add them up and they weigh about as much as a
1.25" setup.
True 2" binoviewers pricing:
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40mm units
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$1795 All 2" for All scopes (2bino40)
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45mm units $1995 All 2" for all scopes (2bino45)
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Current wait is 1year. Call for additional information.
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Optical Correctors (OCA's) for True 2" binoviewers pricing:
**1.325x OCA for dobs/refractors (2pc): $249
*** 1.575x OCA for dobs/refractors(2pc): $229 1pc unit for dob/newt: $179
****1.875x OCA for dobs/refractors: $199 1pc unit for dob/newt: $159
** **** ***** 1Multi Mag 1.2x,2.0x,2.7x OCA2 pc units for Newts\Dobs: $299
Click Here for Elite 1.3x-2.7x Universal OCA Instructions
Corrector details and specs below
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O
SCT
Accessories pricing:
.6x-.7x FLR for 40mm or 45mm unit for SCT's: $179
2.5x Low Profile Telenegative OC $129
x2 Low Profile Telenegative OC : $129
x3 Low Profile Telenegative OC : $129
Multi Mag OCA for SCT's 0.6x, ******1.2x, ****2.0x, *****2.5x OCA for SCT's: $299
Corrector details and specs below
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Other Accessories pricing:
Self-Centering Diopters for Binos (purchase one or two): $120
for one or $200
for a set
Instructions for Diopters style eyepiece holders low profile 2" to 1.25" adapters
Lightweight Low Profile Self-centering 2" to 1.25" eyepiece adapters (comes in a set): $60
Click Here for pictures of the special low profile 2" to 1.25" adapters
Eyepieces for Premium Deepsky Use
2" 34mm or 2" 36mm Observatory Series (70 deg. fov, 20mm ER): $358 a set (save $40 off reg. price)
2" 24mm's Ultra Plus Series Eyepiece (65 deg. fov, 20mm ER): $258 a set (save $60 off reg. price)
Eyepieces for Premium Planetary Use
2" 17mm -19mm's Ultra Plus Series Eyepiece (70 deg. fov, 20mm ER): $238 a set (save $60)
2" 13mm-15mm's Ultra Plus Series Eyepiece (70 deg. fov, 20mm ER): $318 a set (save $40)
All other 1.25" eyepieces in the Ultra and Ultra Plus series will be given $20 off a set of eyepieces
Corrector details.
** represents a corrector that will fully Illuminate a 35mm Field stop (Will fully Illuminate a 2" 30mm Wide field eyepiece)
*** represents a corrector that will fully Illuminate a 39-42mm Field stop (Will fully Illuminate a 2" 36mm Wide field)
**** represents a corrector that will fully Illuminate a 45mm Field stop (Will fully Illuminate a 2" 40mm Wide field) eyepiece)
***** represents a corrector that will fully Illuminate a 45mm+ Field stop (Will fully Illuminate a 2" 40mm+ Wide field.
******No Elements used.
Minor and gradual reduction in the illumination of field after the fully Illuminated Field ends.
Magnification factors can change slightly (+ or - .5x) and will depend on you setup and eyepieces used.
Binoviewers without correctors how do they stack up?
Click Here to see what you Clear Aperture is doing
How to know what to buy
I have been asked this many, many time in the last few weeks. So many choices can be a mixed blessing. All the Black Nights have such strong features in their favor. All are premium units and each are priced very competitively for their size and features. So how do you know which units and accessories to purchase? Here is the way each unit can be viewed so you can determine the optimal outfit that best suits your needs.
BN 22
The original Black Night units work very well and have great light
transmission. There are also a ton of corrector options and for a great
price. These are comparable to the excellent BW-Optic units. If you are
on a budget and want a great entry level binoviewer with better than
entry level performance the standard Black nights are a fine choice.
Black Night units 22mm CA, 1.4lbs $400 Add a 1.8x OCA and premium 19mm's
and your price is $597 A hard to beat deal.
BN 35
All options for these two units are on the 1.25" Black Night Page
including the new zoOM OCa and Self centering Diophers. These two all
1.25" binoviewers, that is the 22mm and the 30mm are completely
compatible with all the correctors and FLR's " accessories. These
are for Large and small scopes alike because of their size weight and
1.25" format.
Now we move into new territory. The Echelon UP 35mm is an interim unit
between the true 1.25" units and the Elite 2" units. It is a
very strong for a 1.25 unit and a little Weak for a 2" unit. So it
is in a class all its own. It has a unmatched Illuminated field for a
Bino with a set of 1.25" eyepiece holders. It does have a 2"
base since it has a too large bottom Clear aperture (35mm)for a
1.25" focuser shaft which would restricted it to roughly 29mm CA,
so a 2" base is necessary. It will use all the Elite Units optical
correctors. Use it for the you most demanding deep sky objects were A
wide TFOV is not important(Tne 2" Binos will raise the bar there)
but brightness is. Try a set of my 24mm WA or 32mm UP eyepieces(you will
not be disappointed). Pans would certainly not be wasted in this unit
since no unit will Illuminate them better. The UP Echelon will have the
widest TFOV possible for a 1.25" eyepieces format and 1.325x mag
factor.
Black Night Echelon UP 35mm CA, 1.0 Lbs
BN 40
Now we have the Black Night Elite 40. It is a first in a
line of true 2" binoviewers. This units is a perfect balance
between size and performance. Use this unit if you want to use 2"
eyepieces and low mag correctors (1.5x or even lower 1.325x) for the
lowest mag and widest TFOV possible for your scope. No other corrector
to date will give this low of a power and only has a 10mm intravel
requirement. This unit may be considered optimal for Dobs and refractors
since the OCA technology gives a it a boost when compared to the 45mm
unit.
Black Night Elite 40mm CA, 1.7lbs
BN 45
Now what might be considered the Grand Daddy of them all. The 45mm unit
(Why not the 50mm unit you say.) The 45mm unit is the ultimate balance
at present between optical path and clear aperture. 7.25" OP and
45mm of CA. This gives it the greatest advantage in Fully Illuminated
Area at the eyepiece. At f8 this represents a 250% increase in FIA
over what is presently possible for a 1.25" unit.(Such as the
Echelon 30mm unit.)This benefit shows up the most in scope like the SCT.
CA rules here. So the 45mm unit and a SCT or MCT with 35mm-40mm will
give the ultimate DS view. Even better then the 40mm. So for Dobs and
Refractors the 40mm is hard to beat, but for SCT's the 45mm is king.
Black Night Elite 45mm CA, 2.0lbs
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