Siebert Optics - Binoviewers

There are many options on this page. Don't let it confuse you. If you have a question as to what setup best suits your needs just call. 919-553-3980.

Excellent Binoviewer Packages from $449

We have added many choices regarding OCA and other adapters so that the binoviewer corrector combinations are almost infinite. Don't let the sheer number of correctors discourage you. Call with your needs for your telescope and a package can be put together that will save considerable money on eyepiece purchases. Typically a corrector can do it better and for much less than additional premium sets of eyepieces. There are differences between the OCA and OC's and other correctors. Some offer particular properties for certain scopes. Please email me at hs3980@nc.rr.com or call me at 1-919-553-3980 with any questions you may have.

Siebert Optics has endeavored to make these products as universal as possible so that they will work with the broadest range of telescopes and other equipment. Simplified and universal setups means you will get the most mileage from these products with minimal hassles in the dark while at the same time not compromising performance.

Quality should should not have to cost a fortune and a low price should never have to be justified. The Black night binoviewer is proving to be superior in every application it is being used in, as well as cost effective. This unit when properly equipped represents the first truly affordable Deepsky binoviewer and despite the hype of other ads, try this unit first and compare to more expensive units. We guarantee you will not regret the money you saved and the performance this unit provides. Todd Gross said it best on his page about my personal 1.25" units when he said that the cost vs. performance ratio is excellent and justifies purchasing the much less expensive Siebert Unit over the more expensive units on the market. There are a number of package deals below that allow you to fully equip the Black Night Binoviewer with premium eyepieces and optical correctors at less than what many premium binoviewers sell for alone. Add to this that all products on this page are backed by a 60 day money back guarantee.* Read below the full details of the optical components and their quality and performance.

Anything you could need for you scope.

Black Night Binoviewers 1/4 ~ visual quality klw/aluminum self-centering eyepiece holders, diagonal friendly 1.39 or1.8x OCA , 24mm Ultra Plus wide angles. These binoviewers are also compatible with my 2" 1.3x Universal OCA and .5x Galaxy View focal length reducer for SCT's.

Binoviewer Package Special -

22mm Black Night binos, (Revised from the Picture) 1.8x, 3.5x corrector, for Dobs and refractors and a set of 21mm swa, Sm. Case - $499

You can exchange the OCA for a SCT corrector with 2x and 3x power.

Or H-A 1.2x corrector for solar viewing

More Pictures below

This is one of the latest additions to the Siebert Optics Binoviewer line. This unit has a 22mm clear aperture and is virtually identical in dimensions to the BW Optik binoviewer. It only weighs 1lb 6ozs. Optics are multi-coated for excellent light transmission. All optical components are guaranteed to be of the highest quality. With the 1.8x OCA corrector this unit performs, in terms of light throughput and optical quality, as good as any 26mm aperture unit under $1000. The corrector has optical properties that maximizes light throughput in these units. Read about the Max light 1.3x - 1.8x OCA correctors on the OCA/barlows page for a full explanation of the performance enhancing characteristics of this optical corrector. ( The only disadvantage of 22mm prisms in this case is roughly a 10% reduction in apparent field on eyepieces 30mm's and higher. But using a set of 21mm-24mm superwides no discernable field reduction is seen. So when using a set of 24mm wide angle eyepieces light throughput and apparent field will be comparable to a 26mm unit at the same magnification when using the 1.3x and 1.8x correctors. This means that low surface brightness objects such as 9th and 10th magnitude galaxies are an easy target in magnitude 5.5 skies. Yes, the combination of these units and the optical corrector is that good. Once again the OCA page has full information on just how good and versatile this little one piece OCA is and it never needs to be separated for use in a refractor. Remember this is an OCA not an OCS. These binoviewers come with an inner ocular distance of 55mm's-75mm's. They are threaded for filters at the bottom. They not only perform excellent on deepsky, but planetary images are razor sharp. These binoviewers come with a 60 day money back guarantee. This is how confident I am that you will like these binos.

When using these binoviewers, the optical corrector and 24mm 65 deg. eyepieces, I was easily able to zero in on the Whirlpool Galaxy on my 10" dob. At just over magnitude 9 this may have been considered a difficult or impossible target for a binoviewer with this prism size with most other barlows. But this formidable combination makes magnitude 10 quite doable. even under less than dark skies. These binoviewers are also compatible with our 2" 1.3x universal OCA. Although the 1.8x has been fine tuned for this unit and will give slightly better light throughput for the given magnification. Remember this is an OCA not an OCS .

Also available is a .6x Focal length reducer for SCT's. It works well with eyepieces up to 32mm's giving them unusually low magnification potential. Also improves the quality of under corrected eyepieces. This special unit does very similar to the OCA above in that it focuses the objective image to a fine beam which maximizes light throughput when using 22mm clear aperture binoviewers in SCT's enhancing brightness while at the same time producing almost 1/2 the magnification of the eyepieces used.

Above pictured is diopter adjusters for Black Night Bino. These have locking hold downs for the eyepiece focus adjusters And are compression self centering holders. These can be fitted to other binoviewers for an additional cost.

Black Night Binoviewer Packages:

22mm CA
Black Night binoviewers with
Dielectric coatings
With Self Centering Diopter adjusters.

$399

When only Binoviewer purchased.

$349 as part of most packages.

Package #1

Package Special for $499

Black Night bino
With Self Centering Diopter adjusters.
Advanced ML 1.8x OCA
set 21mm's
small accessory case

$499 (bnbinos#1)

Package #2

Black Night bino
With Self Centering Diopter adjusters.
set 19mm's ultra's
small accessory case

$499 (bnbinos21#2)

Package can be used with SCT's,

Package #3
Black Night bino
With Self Centering Diopter adjusters.
Advanced Max Light 1.8x OCA
set of Ultra 19mm's (70 deg. fov; 20mm's ER)
small accessory case

$647 (bnbinos19#3)

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

$667 (bnbinos24#3)

Package for use with SCT's, Newtonians, Refractors and Dobs

Package #4

Black Night bino
With Self Centering Diopter adjusters.
Advanced ML 1.8x OCA
small accessory case

$449 (bnbinos#4)

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

Package #5

Black Night bino

With Self Centering Diopter adjusters.
set of starter 21mm's
small accessory case
Add 3 power 0.6x, 2x, 3x SCT multi mag

$549(bnbinos#5)

Package can be used with SCT's

Package #6

Black Night bino

With Self Centering Diopter adjusters.
set of Ultra 19mm's (70 deg. fov; 20mm's ER) and a x2 magnifier
small accessory case

$549 (bnbinos#6.19)

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

$569 (bnbinos#6.24)

Package for use with SCT's

Package #7
Black Night bino
With Self Centering Diopter adjusters.
Max Light 2" 2pc 1.3x OCA for refractors and dobs. upgrade to multi mag add $50
set of Ultra 19mm's (70 deg. fov; 20mm's ER)
medium accessory case

$699 (bnbinos#7.19)

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

$699 (bnbinos#7.24)

Package can be used with Newtonians and Dobs

SCT Package #8

Black Night bino

Super low profile 3 power multi mag 0.6x, 2x and 3x
small accessory case

$449 (bnbinos#8)

Package for use with SCT's

Package #9

Black Night bino

With Self Centering Diopter adjusters.
Advanced Max Light 2" 2pc 1.3x OCA
accessory case

$499 (bnbinos#9)

Package can be used with Newtonians and Dobs

SCT Corrector section

SCT Correctors

Super low profile 3 power multi mag 0.6x, 2x and 2.5x $149

1.25" 2x Super low profile corrector for SCT's, $79
1.25" 3x Super low profile corrector for SCT's, $79
1.25" 4x Super low profile corrector for SCT's, $79

Focal Length Reducers

.6x for SCT's (Barlow Type) - $99
.6x for SCT (Low Profile - Filter Cell Type - $99
Burgess / WO type binoviewer models 0.6x for SCT (Low Profile - Filter Cell Type - $79

OCA's (Optical Correctors)

Ultra transmission and performance. Advanced Max Light OCA's

2" 2pc 1.3x OCA (for refractors newts & dobs) - $199 For Dobs , Newts and refractors with 2" Diagonals and focusers.
2" 2pc 1.3x , 2x and 2.5x OCA (for refractors newts & dobs) - $249 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 - $199 2" Diagonal friendly
1.25" 1.8x OCA - $149 2" Diagonal friendly
1.25" Multi-mag OCA - mags are 1.5x, 2.0x, 3.0x, 3.5x, 4.0x and 7.0x - $249 1.25" and 2" Diagonal friendly

Simple Refractor & Reflector Plug and Play Correctors

1.25" 2.0x OC, $99
1.25" 2.5x OC, $99
1.25" 3.5x OC, $99
1.25" 4.5x OC, $99

Recommend Eyepieces

19mm Ultra SWA, $198 set (Reg. $119 each)
24mm Ultra Plus SWA, $198 set (Reg. $129 each)
13mm Ultra SWA, $278 set (reg. $149 each)
15mm Ultra SWA, $278 set (reg. $149 each)

Eyepieces listed above must be purchased as sets with binos. All other eyepiece sets will be $20 off the purchase price when purchased with the binos.

Accessory Cases

Small Accessory Case w/pluck foam (9"x 6.5"x 3.25"), $15 (SmCase)

Medium Accessory Case w/pluck foam(12.75"x 9.25 x 4.25"), $20 (MCase)

Large Accessory Case w/pluck foam (16.75"x12"x4.25"), $30 (LgCase)
Upgrade any package to Medium Accessory Case for $5 or free upgrade with purchase of two sets of eyepieces.

Centering Diopter Adjusters

Double diopters to our self-centering eyepiece holders for the Black Night Bino A $149 Value Free with Binoviewers

(click pictures to enlarge)

Black Night binoviewer w/aluminum self-centering eyepiece sockets. These come with " self-centering eyepiece holders and give a perfect fit for your 1.25" eyepiece barrels regardless of the barrel diameter variations.

Black Night Binoviewers are very light even with a 1.8x correctors weight is only 1 lb 7.4ozs.

Black Night Binos 1.25" w/1.8x OCA. Lower optic 25mm's. Total light throughput in scopes as low as f/4 without aperture vignetting. Extremely short profile along with being parfocal means the light cone easily enters the bottom without reduction of light throughput and is 2" diagonal friendly for Refractors. Remember this is an OCA not an OCS

Black Night Binoviewer w/ 24mm w/a eyepieces.

These binos can become even more useful when using the .5x universal focal length reducer. Use it just like a barlow and it reduces the magnification of the eyepieces used by a factor of .6x-.65x depending on the focal length of the SCT used. The shorter the focal length the greater the magnification reduction will be.

*30 Day money back guarantee (unless damaged of course). Also has a 2 year manufacturers defect warranty; and 5 year free alignment (although you should not need this), and free lifetime cleaning (you just pay shipping costs only).