Siebert Optics - Binoviewers

Premium 25mm Large Clear Aperture Black Night Super FMC $499.

<<<How they compare Video! More a few links down.

BN25 Features and Dioptors Videos 1 - 2 - 3 <Right Click and choose (save link as) to download and save.

Whether you have a Dob, Refractor or SCT this is the binoviewer for you. As you will see below nothing even comes close for this price.

New packages below. The most advanced packages start in package #2 and get less expensive as you go down --Questions just email. harrysiebert@nc.rr.com or just call (919 553 3980)

Mel Bartel Diagonal Calculator <Check math here. Remember inside the Calculator you need your objective size and F.L. of your scope. Then the "diagonal" = CA and "To Plane" distance = OP. Play with different focal Lengths to see the changes. The BN25 will impress you.

Acronyms defined: OP=Optical Path, CA=Clear Aperture, FIA=Fully Illuminated Area

Which eyepieces will you will use is now up to you. Panoptic 24mm's, Siebert Ultra 24mm's or 32mm/40mm Plossls, the sky is the limit. You are not limited to eyepieces in the 20 mm range. In fact you can use the same eyepieces as TV and Baader and not worry about vignette. Want more information on this just call or email. More info below.

Acronyms defined: OP=Optical Path, CA=Clear Aperture, FIA=Fully Illuminated Area

These binoviewers are equal to or lighter then any other binoviewers on the market, They have more aperture then any binoviewer costing under $900, This means you can use any eyepieces you wish just like any other large prism binoviewer without the annoying vignette you get with binoviewer of small prism size. They have a OP/CA ratio that gives them the same FIA as the largest prism binoviewers on the market costing 3x plus.

This is true in any scope with an optical system from f4 - f10. In fact there is only 2 Prism based binoviewers that will give you ANY diameter of FIA spot in an f4.5 system is (This is not using and Optical Corrector in the system) and they are Baader 28mm and the new BN 25mm dielectric. Want Proof Click here.

Binoviewers are not like most other astronomical equipment. Some take to Binoviewer very quickly and never look back but with others it may take time to understand and identify any compatibility issues you may personally have when using Binoviewers. Many times these compatibility issues are worked past very quickly but for some it is not that simple.

Also weather doesn't cooperate when we need to test that equipment we just purchased. This might put pressure on people to make a quick assessment if their time is limited with a short warranty.

So is there a reason not to give an abundant warranty period. Not if the equipment is known to be received well with few problems and if you virtually never get returns then it will be painless to offer an extended warranty. That way you have the time to truly assess your purchase. In fact a non stated or an extremely limited return policy may be a warning that a company has experienced problems and has too many returns. Thirty days may be reasonable but 60 days is definitely better.

The most advanced packages start in package #1 and 2 and get less expensive as you go down --Questions just email. harrysiebert@nc.rr.com or just call (919 553 3980)

25mm CA
Black Night binoviewers with
Dielectric coatings
With Self Centering Diopter adjusters.
T-2 Free floating female ring add $69

$499 (bnbinos#0)

When only Binoviewer purchased.

As part of most packages. $449

Package #1

25mm CA

Black Night binoviewers with

Dielectric coatings

With Self Centering Diopter adjusters.

Max Light 2" 2pc 1.0x(refactors) "or" 1.3x OCA (refractors and Dobs).
Set of Ultra 19mm's (70 deg. fov; 20mm's ER) OR

Or substitute a set of 24mm's (65 deg. fov; 20mm's ER)

$896 (bnbinos#1)-dob/ref

Package can be used with Newtonians, Refractors and Dobs

Package #2

25mm CA

Black Night binoviewers with

Dielectric coatings

With Self Centering Diopter adjusters.

Max Light 2" 2pc 1.0x -1.5x -2.0x "OR" x1.3x -2.0x -2.7x for refractors and Dobs.

Set of Ultra 19mm's (70 deg. fov; 20mm's ER) OR

substitute a set of 24mm's (65 deg. fov; 20mm's ER)

$979(bnbinos#2)-dob/ref

Package can be used with Newtonians, Refractors and Dobs

Package #3

25mm CA

Black Night binoviewers with

Dielectric coatings

With Self Centering Diopter adjusters.

1.25x Multi Mag OCA or Advanced Max Light 1.8x OCA

set of Ultra 19mm's (70 deg. fov; 20mm's ER) OR

substitute set of 24mm's (65 deg. fov; 20mm's ER)

$799(bnbinos#3)-dob/ref

Package can be used with Newtonians, Refractors and Dobs

Package #4

25mm CA
Black Night binoviewers with
Dielectric coatings
With Self Centering Diopter adjusters.
1.25x 1.25" OCA or x2 OCA
set of Ultra 19mm's (70 deg. fov; 20mm's ER) OR
substitute set of 24mm's (65 deg. fov; 20mm's ER)

$789 (bnbinos#4)-dob/ref

Package can be used with SCT's Newtonians, Refractors and Dobs

Package #5

25mm CA
Black Night binoviewers with
Dielectric coatings
With Self Centering Diopter adjusters.
1.25x 1.25" Multi Mag OCA or Advanced Max Light 1.8x OCA
Or Max Light 2" 2pc 1.0x (refractors) "or" 1.3x OCA (refractors and Dobs).Add $99
20mm's Standard performance WA 65 deg fov and 18mm ER.

$699 (bnbinos#5)-dob/ref

Package can be used with SCT's Newtonians, Refractors and Dobs

Package #6

25mm CA
Black Night binoviewers with
Dielectric coatings
With Self Centering Diopter adjusters.
1.25x OCA or x2 OCA
20mm's Standard performance WA 65 deg FOV and 18mm ER.

$728 (bnbinos#6)-dob/ref

Package can be used with SCT's Newtonians, Refractors and Dobs

Package #7 SCT

25mm CA

Black Night binoviewers with

Dielectric coatings

With Self Centering Diopter adjusters.

3 in 1 Multi Mag (0.7x-x2-x3)

Set of Ultra 19mm's (70 deg. fov; 20mm's ER) Or substitute set of 24mm's (65 deg. fov; 20mm's ER)

Or Standard performance 20mm's WA 65 deg FOV and 18mm ER. Minus -$89

$819 (bnbinos#7-SCT)

Package for use with SCT's only

Package #8 SCT

25mm CA
Black Night binoviewers with
Dielectric coatings
With Self Centering Diopter adjusters.

0.7x OCA or x2 Magnifier

set of Ultra 19mm's (70 deg. fov; 20mm's ER) OR
substitute set of 24mm's (65 deg. fov; 20mm's ER)
Or Standard performance 20mm's WA 65 deg FOV and 18mm ER. Minus -$89

$769 (bnbinos#8-SCT)

Package for use with SCT's only

Package #9 SCT

25mm CA
Black Night binoviewers with
Dielectric coatings
With Self Centering Diopter adjusters.

set of Ultra 19mm's (70 deg. fov; 20mm's ER) OR
substitute set of 24mm's (65 deg. fov; 20mm's ER)
Or Standard performance 20mm's WA 65 deg FOV and 18mm ER. Minus -$89

$679 (bnbinos#9-SCT)

Package for use with SCT's only

Package #10 SCT/Dob/Ref

25mm CA

Black Night binoviewers with

Dielectric coatings

With Self Centering Diopter adjusters.

Choose your OCA-SCT or (D)ob/(R)ef

1.8x Maxlight OCA D/R

1.25x / x2 / 3.5x MM D/R

minus $20 for 1.25x OCA Dos/Ref

3 in 1 Multi (0.7x-x2-x3) SCT

Specify OCA Please.

$649 (bnbinos#10

Package #11 SCT

25mm CA
Black Night binoviewers with
Dielectric coatings
With Self Centering Diopter adjusters.
Standard performance 20mm's WA 65 deg FOV and 18mm ER.

$599 (bnbinos#11-SCT)

Package for use with SCT's only

SCT Corrector section

SCT Correctors

Super low profile 3 power multi mag 0.7x, 2x and 3x $149

1.25" 2x Super low profile corrector for SCT's, $119
1.25" 3x Super low profile corrector for SCT's, $119
1.25" 4x Super low profile corrector for SCT's, $119

Focal Length Reducers

.7x for SCT's (Barlow Type) - $119
0.7x for SCT (Low Profile - Filter Cell Type - $119

OCA's (Optical Correctors)

Ultra transmission and performance. Advanced Max Light OCA's

2" 2pc 1.3x OCA (for refractors newts & dobs) - $249 For Dobs , Newts and refractors with 2" Diagonals and focusers.

2" 2pc 1.0x OCA (for refractors) - $249 Refractors with 2" Diagonals and focusers

2" 2pc 1.3x , 2x and 2.7x OCA (for refractors newts & dobs) - $329 For Dobs , Newts and refractors with 2" Diagonals and focusers

2" 2pc 1.0x , 1.5x and 2.0x OCA (for refractors newts & dobs) - $329 For Dobs , Newts and refractors with 2" Diagonals and focusers

Low profile section. Advanced Max Light OCA's Compact setups are all 2" diagonal friendly.

1.25" 1.5x OCA - $249 2" Diagonal friendly
1.25" 1.8x OCA - $149 2" Diagonal friendly

Simple Refractor & Reflector Plug and Play Correctors

1.25" 2.0x OC, $129
1.25" 2.5x OC, $129
1.25" 3.5x OC, $129
1.25" 4.5x OC, $129

Recommend Eyepieces

18mm Performance WA, $149 set (Reg. $79 each)

14mm Performance WA, $149 set (Reg. $79 each)

19mm Ultra SWA, $198 set (Reg. $119 each)
24mm Ultra Plus SWA, $198 set (Reg. $129 each)
13mm Ultra SWA, $278 set (reg. $139 each)
15mm Ultra SWA, $278 set (reg. $139 each)

Accessory Cases

Small Accessory Case w/pluck foam (9"x 6.5"x 3.25"), $19 (SmCase)

Medium Accessory Case w/pluck foam(12.75"x 9.25 x 4.25"), $29 (MCase)

Large Accessory Case w/pluck foam (16.75"x12"x4.25"), $39 (LgCase)

Centering Diopter Adjusters

Double diopters to our self-centering eyepiece holders for the Black Night Bino
$149-Value Free with Binoviewers
2 year against defects.

Difference between the 3 Binos

#1) $449 The 25mm Premium Black Night has been completely remanufactured to the highest standards and will match the performance in all respects to the really expensive units costing twice as much or more. The alignment warranty is 2 years.

OUT of stock #2) $199 The second model listed is a 22mm unit that has had the prism set points replaced and has been realigned. After cleaning and alignment they are much better then any binoviewer in their price class. The alignment warranty is 2 years.

OUT of stock #3) $149 The third model listed is a 22mm unit that has had the alignment checked and if needed adjusted. After inspection they are sold. The are better then most of the Chinese Clones because they have the Self Centering holders. They only come with a 30 day satisfaction guaranty. If they are ever in need of alignment again it will cost you $50 to bring them up to the same standard as the #2 $199 binoviewers above.

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