First Binoviewers are on the way!
Posted 23 December 2012 - 09:44 AM
Secondly, and perhaps more concerning, I have read some horror stories about the binoviewers and eyepieces crashing to the ground. What would be the best way to secure the binoviewers/eyepieces to the scope. I sure dont want it to all come crashing to the ground
Posted 23 December 2012 - 10:01 AM
TMB Planetary II 6mm,9mm
AT Titan 70* 32,38mm
Green means that it should work fine.
Red of course means that it either won't work (2" barrel) or is not recommend (to short a focal lenght... Better to reach high mags with a barlow than short focal lenght eyepeieces in a binoviewer to avoid merging issues if there is any mis-alignment, which is easier to see at high powers if done by short focal lenght eyepeices(>
Securing them... My advice would be that if you are using a 2" diagonal and your current visual back does not have three screws radially on a compression ring to hold the diagonal nose in place, consider upgrading to one that does, or a Clicklock (though there has been one forum memeber has reported a Clicklock slipping).
If you turn the binos to the side, as is often necessary when viewing lower in the sky, and you use heavy eyepieces, then you do indeed risk the possibility that the Bino will rotate down suddenly.
Make sure your visual back is screwed on Tight!. Use a strap wrench if necessary to get it tight enough to ensure that it will not suddenly come loose if the bino is on the right side of the Center of gravity.
And I try to never let go of the binoviewer with on hand until I have the eyepeices locked in place. That way, if you get a rotation event, they at least won't fall out.
Posted 23 December 2012 - 10:22 AM
Posted 23 December 2012 - 11:52 AM
Posted 23 December 2012 - 12:18 PM
In your dob, unless you are holding the entire dob upside down and sideways, I can't see a way for the bino's to "fall out". Beware however of balance issues that will cause your dob to swing and slam into either the vertical or horizontal position. I don't even like mentioning the word "slam" when it comes to my scopes, because no good ever seems to come of it.
Enjoy and happy holidays.
Posted 23 December 2012 - 12:42 PM
Posted 23 December 2012 - 03:20 PM
I feel the opposite, probably because I use Brandons - - its far easier to change out the super small lightweight eyepieces than to remove and replace the entire binoviewer.
I always remove the binoviewer from the diagonal to change eyepieces. It's just too risky to be fiddling with the assembly while it is in the diagonal.
Posted 02 January 2013 - 07:25 AM
Posted 02 January 2013 - 09:02 AM
Posted 26 January 2013 - 12:05 AM
I have one of Siebert's "Universal" multi-mag OCAa, which works great with my Blacknight in my 12.5" DOB, but the OCA is not needed or helpful in my C8.
BTW, with the $149 unit you mentioned, the 3X setting is for refractors only, so you would get 1.25, 2 and 3.5. Frankly, there aren't a lot of occassions when viewing at 3.5 power will be enjoyable - unless you live somewhere where the skies are really steady. But I would expect the 1.25x and 2x options to be quite useful.
Posted 26 January 2013 - 09:26 AM
Have fun with your new toy:)
Posted 27 January 2013 - 10:11 AM
Posted 27 January 2013 - 10:14 AM