Siebert Optics - 2" Binoviewers

The Echelon VP40 is the largest and least expensive 1.25"/2" prism based binoviewer available. See details below.

The Echelon VP40 now comes as an option with 2" Self-Centering holders(Similar to the Elite 45mm) as an option. Click and See Here and Here

VP 40mm Clear Aperture. With standard 2" base or optional T- 2 female threaded bottom. You CAN get the T- 2 and a "thread on" 2" base optionally. The units have 1.25" Self-Centering eyepieces holders natively. They are only ones of their kind.

----------

These new 40mm Clear Aperture binos with 1.25" holders shown are by far the biggest Binoviewers available.

--------------------------------------------------------------------------------------------------------------

This mod is an extra $99 and makes the Echelon binoviewers interchangeable with the eyepiece holder of a 2" diagonal. It comes with a 2" nose piece that threads in place for normal use in a dob or unmodified diagonal.

Eye spacing from 50mm-83mm gives it the greatest Interpupilary range of any binoviewer on the market.

You WILL get much better total illumination with a 40mm CA. To compare to other Units. (Click Here) And the New VP 40mm. Specs on the 40mm are better yet at the bottom of this page.

These units have custom made optics and have the spec's to outperform any bino in planetary and deepsky use. Try a set of my 1.25" Ultra Plus 24mm SWA eyepiece's for the ultimate 1.25" DS view. Low mag correctors in the 1.3x, 1.5x and 2.0x range are available.

Siebert VP binoviewers are for those who want more aperture then is presently available on the market elsewhere.

The VP is based on a 40mm beam splitter with a lower Clear Aperture of 40mm. You can get the units with either 1.25" eyepiece holders(31mm CA) or 2" eyepiece holders(33mm CA). You can get it with a T- 2 female threaded base or standard 2" mount or optionally both. The optical path is 157mm giving it by far the best "CA vs OP" ratio of any binoviewer on the market.

The closest being AP Baader 28mm CA and 114mm OP. This means in an SCT with the VP you will get 100% illumination out to a 27mm field stop vs. Baader's 16mm full Illumination at the field stop.

The 40mm beam splitter and prisms are dielectric 99%,. The units with the 1.25" eyepiece holders will have Self Centering Diopters standard on both sides. The model with 2" Self-Centering eyepiece holders has one side fixed and the right side adjustable for focus. The 40mm CA at the bottom will make it necessary to have either a T- 2 or 2" It is lighter in weight then most 1.25" binoviewer on the market.

The best thing is its price. With the 40mm VP Starting at $1299 you are in the lower premium binoviewer price range. The Baader compared above although not matching it's CA/OP specs is over $1600 new. So this makes the Siebert 40mm VP unique.

The biggest CA, the shortest Optical path and in the lightest most compact package possible.

Did I mention the finest optics and building materials.

. A lot of cosmetic touches have been added to these to give them a beauty all their own. The T- 6 Aluminum and black Delrin composites are very tastefully done to make these binoviewers an attractive novelty.

Info on Self Centering Double Diopters Adjusters and how they work.

** The Elite binoviewer has advantages because of its greater size. 45mm CA. at the bottom and 40mm at the eyepiece holders. Also the holders are more advanced with both sides having Self-Centering focus adjusters.

Elite 45mm binoviewer seen here.

Here

2" Eyepiece holders: Right side Self-Centering and fixed and Left side self-centering with right side Diopter focus.

See here

It looks different because all binoviewers really have a light path that is not actually symmetrical. (looking equal and opposite on both sides.)

Most binoviewers have additional imposed covers to make the light path look like it is the same on both sides.

What you see is the true light path of a binoviewer and if you study it you will learn a lot about the way a binoviewer works.

The Echelon binoviewer looks great and uses good building materials. But without the added material to add weight and cost.

Because of this this, the unit has a large CA, cost less than a Baader binoviewer and is lighter than almost any other binoviewer.