[Renato1 (Renato)]

I have a Denkmeir Binoviewer set, which requires using different pieces to be attached to the Binoviewer or star diagonal in order for it to work with SCTs, refractors and Dobs. (You can download instructions at their site).

Mine worked fine with my 14.5" dob, but the binoviewer and eyepieces were extremely heavy, requiring a lot more counterweight - which I didn't have, so I basically hand held my dob up to look at the bigger DSOs.

The Denkmeir ones have versions where you move sliders across and change the magnification in the unit while using it, so that you can get several magnifications on a pair of eyepieces. But the magnifications are different, depending on which telescope type is used.

I also have a simpler Takahashi binoviewer, where the eyepieces go in at a 45 degree angle. It basically connects to SCT via SCT thread and to refractors (using 2" to SCT thread adapter). It is easier to attach and use, but the 45 degree eyepiece angle makes it hard to use on anything high up in the sky. It can't be used with my dob.

I guess I'm the exception, I don't get wowed that much using binoviewers - either with my Denkmeir or Takahashi one - rather I think them a nuisance to viewing lots of things in the sky. Some people like looking at the same thing for a lot of time, and I think a binoviewer would suit them better. I think I've only been wowed using them to look at the moon in my C8.

So I don't use them much, preferring to use my 20 or so pairs of binoculars instead. But plenty of people love using them, and you may be one.

Regards,
Renato