Advice on binoviewers...
Posted 30 November 2012 - 05:02 AM
Either way, I don't have the kind of extra money I had back then, but am interesting in trying things out again.
Are the WO binos worth trying or is it just worth waiting and going with a better setup?
As you can see in my signature I have 2 refractors around F7 and a couple dobs F4.7 and F8. Probably mostly interested in using the refractors, but would like to use the big 10 inch also.
Posted 30 November 2012 - 05:18 AM
Posted 30 November 2012 - 05:25 AM
One thing about my 80mm apo is it needs a 2 inch extender to come to focus (the lens was upgraded to an apo from an achro). Would that extra in-focus be helpful for binoviewing?
Does it have to be the powermate? or could it be a normal 2x or 3x barlow? I have a 2x celestron ultima (older) and a 3x televue barlow.
Posted 30 November 2012 - 05:47 AM
A removable 2" extender is definitely a good thing! This means that there is more available back focus.
It doesn't need to be a PowerMate, but a normal barlow, when used in concert with a binoviewer, will often operate at somewhat higher magnification than normally, so that you are limited to high magnifications. A binoviewer really shines at low to medium power, so this can be a serious drawback, depending on the scope and barlow combination. You often want to get down to 50% - 75% of your normal single-eyed magnifications when binoviewing, because the image will appear much larger than before and your eye can resolve finer details when both work together. That is at least my experience. A normal barlow will also not have the parfocal function of the PowerMate, so even when using a barlow, you may have focus issues with scopes with narrow focus range, such as newtonians.
Posted 30 November 2012 - 08:51 AM
Posted 30 November 2012 - 10:38 AM
Posted 30 November 2012 - 10:58 PM
I would skip the entry level imports and get the Baader Maxbrights. For the additional cost, it could easily be your last binoviewer. Try Televue Plossls in the focal range you desire. Their planetary views are excellent.