Presents
The 6.3 UNIVERSAL Focal Reducer Solution

Does your telescope look like this when using a f/6.3 focal reducer ?
Are you troubled by not having the right spacers ?
Are you having trouble using a focal reducer with your AO-7 ?


  The typical 2" focuser with 6.3 reducer and extension tube 
attached.          Note the overhang! 		      The same camera with the New Focal Reducer Adapter attached.         Note the minimum overhang!
  With The standard f/6.3 adapter, it's 2 inch extension tube and 2 inch adapter, you have a total extension of 3.5 inches from the back of the focuser, then add the setback of the focuser 2.5-3.5 inches from the back of the OTA
Now you can get rid of the overhang and camera flex with our
New Universal Focal Reducer adapter Tube. And have a setup that looks like this,
 with SELECTABLE 6.3 spacing.        AO-7 users see note below.
 The System concept is based on the ability to mount the focal reducer optics in a moveable cell inside a 2"O.D. tube.
This allows the optical train to be better matched to the telescope being used. In fact as the chart shows different
spacing ( 85mm-130mm ) can yield different usable F-ratios, thus expanding the versatility of the focal reducer.  For
any one SCT telescope optical system, there is one spacing that will yield the minimum vigneting. That spacing is different for each SCT telescope system based on Primary Diameter and focal length.
   Originally the tube system was designed with a fixed spacing to help solve the tremendous overhang problem that
 was created when a focal reducer was added to the optical train. It was soon found that one spacing didn't fit all.
Thus the design of this tube system. This allows for easy adjustment of the reducer position. A side benefit was that with a different insert you could use eyepieces for projection or a barlow to extend the focal length of the telescope
and keep the benefit of having the optics inside the 2" focuser minimizing overhang.
 
Focal reducer spacing chart
Artical--Focal Reducer Notes


    The standard 6.3 adapter and extension tube with
two inch adapter to fit 2" focuser. Total extension is 3 1/4 inches from the back of the focuser. Add to this the setback of the focuser which can be from 2.5 to 
3.5 inches. This is the chief cause of back focus issues. 		      The New 2" Focal Reducer Adapter Tube with 
built in moveable F/6.3 focal reducer,  Note zero overhang, and the FLR is placed as close to the back of the OTA as possible. There are no back focus problems with this arrangement. 
       Shown is the non-anodized engineering version.

           NOTE: The Adapter is designed to fit all SBIG and FLI  Max-Cam cameras  with filter wheel.
 It can also be used with any camera that uses other external filter wheels, and be used with the ST-5,
 the ST-237, or any camera without a filter wheel.  Vigneting is slightly reduced with the new tube,
 but could still be a problem with larger chips. Tests show that with a ST-9 camera on a C-11 @ f/6, vigneting only
 showed in the corners and easily removed with flat fielding, stars also seemed good to the edge.

        AO-7 Users: A shortened fixed version of the Adapter Tube is also available, that places the focal reducer
  1/8 inch from the T-thread adapter on the AO-7, reducing the overhang by almost 1 1/2 inches and moving  the
  optical train into the focuser draw tube by about 1 1/2 inches. This short tube adapter is best suited to the C-11
  and Meade 12".
   Note: The Universal Adapter tube has been redesigned to keep the spacing the same as the  Short tube version this gives the user greater versitly.

      The New Tubes are setup to accept the  OPTICAL COMPONENTS  from your old 6.3 focal reducer, either
 Meade or Celestron and is completely reversible. The replacement of the optics in the new tube is easy
 and maintains the optimum FLR spacing.
      For those unwilling to attempt the removal of the optical components from the original reducer,  we will gladly
 install them for you at no extra charge. The turn around time is about one week for tubes in stock, and the units
 are shipped back Priority Mail.
      For those that have not yet purchased a Focal Reducer we offer a complete setup including mounted Celestron  optics.

PRICING :  UNIVERSAL ADAPTER TUBE with sliding f/6.3 insert ----- $159.00
                                with Celestron Optics installed---------$285.00
                  Extra insert for use with f/3.3 optics----------$75.00
        1.25" I.D. Insert to hold a Barlow or Eyepiece for projection-----$40.00

                   AO-7 Short 6.3 Adapter tube -------------- $!08.00
            AO-7 version with Celestron Optics installed --- $235.00
                               Shipping in Cont. U.S. included in all the above
 Note: For those desiring optics installation we suggest careful wrapping of the
          optics before shipping to us. Please include payment.
                               Make checks payable to  Ted Agos

Any questions, e-mail     lester@ziplink.net
                        Phone  508 8655613
Mail to:  Ted Agos
            85 Town Farm Rd.
            Sutton Mass. 01590