Hey guys,
I have recently been thinking about getting a Barlow lens for my dob, and found out earlier this week that we were going to make a trip to Brisbane on Saturday. I have requested to stop at York Optical on the way down so I can pick one up. (
http://www.yorkoptical.com.au/ their site for all interested).
I have had a quick read of some of the other Barlow lens related posts, but they didn’t seem to help me too much.
Anyway, as there seem to be a wide range, I was hoping I would be able to get some help on the subject.
Question One:
As most of you probably know, I use my video camera held up to my 32mm eyepiece to take movies which I stack in Registax. Would it therefore be better for me to get a 2" Barlow, as it would also double the magnification of the camera? Or does camera zoom + telescope focus trick completly cover that anyway? I do eventually plan to buy a ToUcam (is that the right spelling?), so I’m not sure weather the extra cost of a 2” compared to a 1.25” would be justifiable.
Question Two:
As with most things, I am guessing that choosing a Barlow should be based on what I wish to do with it? Although I have been chasing after so Nebula and DSO's, viewing and imaging planets is definitely my main interest (along with Lunar viewing and imaging).
Anyway, I hope you guys can help me with my questions. I’m really looking forward to getting closer views of my favorite night objects.
BTW- My telescope stats are probably important, so here they are:
10 Inch Dob (GSO) F5 (1250mm)
My eyepieces are the standards with Bintel’s BT-252 ‘scope, 32mm, 15mm and 9mm.
I have a budget of about $100 to throw around, though I will go to $150 if I really have too.
Thanks heaps for any help!