Ad #1

Focusable 2" diagonals with (S)elf (C)entering eyepiece holder.

Price to convert your diagonal is $149

If we purchase and/or stock the diagonal it will cost the current cost of the brand you choose + $10 for purchase and stock costs.

Here are some diagonals you can choose from. You can click on the name to see the diagonal you are purchasing before conversion. 

If we convert your Daigonal

Converted focusable SC   WO 97% Refractor Diag $257

Converted focusable SC   WO 99% SCT  Diagonal $347

Converted focusable SC Astotech Ref Diagonal   $238

Converted focusable SC Astotech SCT Diagonal  $248

Picture soon to come

Do you have minor to "Gorilla" mirror shift in your LX series or other telescope? Are you thinking about installing a focuser after your visual back to fix the problem?  You may create more problems then you fix. Some SCT scopes have limited room between the visual back and scope fork and a focuser may make slewing to the zenith impossible.

 Or  you may not be able to come to focus with certain accessories like focal length reducers or binoviewers because of the added length of the focuser.  If nothing else the added length of the focuser will increase the magnification of your SCT by as much as 15%  

Would you like to have the problem eliminated quick and neatly without adding any more length to the back of your scope or focal length?  At the same time have your eyepiece holder a self centering type that is precise and holds your eyepiece firmly without marring the barrel. Even with the thumb screw compression ring type you really have to torque the screw down to get a good hold on the eyepiece. Not so with the feather touch self centering holder replacement sold by Siebert Optics. If we convert your diagonal the cost is $149

Ad #2 

For Binoviewers 

Special low profile 1.25" diagonals for your Refractor's including such as WO/Astrotech 66mm ED/ Orion ED 80mm and 100mm or other refractors you might have with a 2" visual back

Price of diagonal is $169      99% transmission diagonal.

Look below for more pictures

This will work with the Orion ED series/WO and Astrotech and many other refractors.

What this diagonal does when used with a Burgess/WO/Stellarvue and other like  binoviewers.

Focus your refractors including the WO/Astrotech ED / Orion 80mm and 100mm ED refractors.  Without an OCA! 

Sometimes you are so close to focus with binoviewer in your 1.25" diagonal that you can almost taste it, but can't quite get there.

Thread this diagonal on your WO/Burgess or Stellarvue binoviewer and attach it to you refractor and you will be binoviewing without the added magnification of an OCA and at a price that might be less expensive then most of my OCA correctors. 

Scope in solar use and focusing nicely

Ad #3

Modification of your 2" Diagonal for SCT

Price is  $40.

We will modify your own diagonal by shortening the neck attaching it to the visual back.  This  allows full slewing to the zenith with such scopes as the Nexstar 8 and Meade LX scopes and many other types best known to the owners as having a problem reaching the zenith due to a 2" diagonal.  

Ad #4

2" Diagonal for SCT's

  Astrotech or Orion 97% transmission diagonal. Same as a WO diagonal.

 (SCT2DIAG)This sells for $140

  This will be a Orion 2" diagonal with a modified neck to allow for SCT's to reach the zenith in scopes like the Nexstar 8, Meade LX scopes and other scopes  that have this problem when using a regular 2" diagonal.