|
Finder scope as guider...
Hey gang...I have seen a bunch of converted 8x50's and 9x50's finders but I am having a heck of a time trying to find the right distance to make my little 6x30 finder into a guider...I have a SPC900NC webcam that I would like to hook to it to try it out...its going on a 6" SCT so thats why I wanted to stay with the 6x30 as it already has the guide rings for adjustment...
I found that if I take the front lense out of the scope that it takes around 12" or so in front of my eye to get the lense to come to focus...this is way too long for what I am needing...my assumption is that the rear lense is acting like a barlow to reduce the length needed on the tubes overall length?
Buying a guide scope and the stuff to mount it are not an option as I'm a stay at home dad and the funds aren't flowing (hell there not even trickling)...so I have to use what I have...
can anyone help me...is there a formula as to how far the ccd needs to be away to get it to focus...thoughts on how to go about it?
|