SW 120ED and binoviewers

[Acrab67]

Hi.,

I am thinking of buying the new Baader MaxBright II when it goes on the market (if it does). I was wondering if someone who has  the SW 120ED can tell me what elements are neccesary to be able to focus.

Thank you.

[AdeKing]

With the Baader 1.25" T2 prism diagonal, I think I use a Baader 1.7x GPC to reach focus.

I tried binoviewing with a 2" diagonal fitted at the weekend and couldn't reach focus, even with my 2x VIP Barlow in all configurations.

I'm sure someone else will be along with more info soon.

[Ricochet]

Download the manual from https://www.baader-planetarium.com/en/accessories/optical-accessories/bino-viewer/baader-maxbright-2-binoviewer-with-case.html

Page 21 has a table that gives the required amount of back focus for different variations of diagonal and gpc when used with the binoviewer. Compare these to the amount of available back focus that your telescope has with any specific eyepiece that you might wish to use in the binoviewer. 

[Acrab67]

Does anyone know what the back focus amount of the 120ED is?

[Fedele]

Hi, 

me and a friend expert in accessories, measures etc  have found two solution to reach focus with SW 120ED, without cutting the tube and no OCS

[mikeDnight]

I used an Equinox 120ED for many years with a revelation binoviewer, 2" low profile mirror diagonal, and 2X SW Delux barlow. I had no focusing issues. A terrific combination! Although the image below doesn't show the binoviewer, it does show the low profile diagonal, where the 2" to 1.25" adapter sits low inside the 2" diagonal. May be this would give ant extra inward focus needed?

 

Another thing that can allow more inward focus is this genius adapter from Skywatcher, also available under other brand names. It sits flush with the surface of the 2" diagonal and holds the eyepiece or binoviewer solidly in any position. 

Edited March 20, 2021 by mikeDnight