Baader Planetarium MAXBRIGHT Instruction Manual

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Copyright © 2006, Baader Planetarium GmbH, Unitron Italia Srl, Alpine Astronomical LLC.  All rights reserved.  Copying or use without express 

written consent is prohibited. (Worldwide @ www.baader-planetarium.de),(Italy @ www.unitronitalia.it),(USA @ www.alpineastro.com)  

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BAADER MAXBRIGHT

®

BINOCULAR VIEWER 

INSTRUCTION MANUAL 

Congratulations on your purchase of the Baader MaxBright Binocular Viewer. This is a very sophisticated optical 

accessory that, if used in the right way, will offer you amazing views for all your life. To obtain the maximum 

performance from the viewer, we suggest you spend a little time reading this instruction manual before starting to use it. 

Parts List and Name 

1 

Eyepiece Locking and Fine Collimation Screws  

2 

Eyepiece Holder 1.25" (31.8mm) 

3 Rubber 

Grip 

4 

Rotating Threaded Ring and front Optical Window 

(not visible) 

5 

Glasspath Corrector (back focus compensator) 

6 

T2/1.25" (31.8 mm) Barrel/Nosepiece (or T2/2” 

(50.8mm) Barrel/Nosepiece) 

Setup 

y

  Remove the two plastic caps from the eyepiece holders and 

unscrew the black cap from the optical window of the 

viewer.  

y

  Screw the six (6) screws provided into the holes of the 

eyepieces holders.  

y

  Screw the Glasspath Corrector inside the 1.25" (31.8mm) 

barrel (see page 5 for instructions on using a 2” nosepiece). 

y

  Screw the T2/31.8 barrel onto the front of the viewer, 

turning the locking ring until tight. 

y

  Insert the Binocular Viewer in the telescope's eyepiece holder and tighten the set screw(s) to hold the binoviewer in 

place. 

Optical distance, Back-Focus and Glasspath 

compensator 

To pass through the binoviewer and reach the eyepieces, the cone of 

light coming from the telescope covers a path of about 100-110 mm. 

Therefore the telescope must have a back focus (the travel of the light 

outside the focuser) of at least 110mm in order to be able to reach 

focus when used with the binocular viewer. So, several factors must 

be considered:  

1)  The majority of the Newtonians present a very short back focus, 

usually no more than 30-60 mm; as a result, a typical Newton 

telescope doesn't allow the use of a binoviewer without the use of 

a back focus compensator.