Hi folks,
I can't believe how big the Carina Nebula is. Still a newbie I guess, but WOW. With my 12" Dob and the large collection of GSO EPs, I still can't get fit the whole thing in view. Acording to the fov overlay in my star atlas, it's like 3.5 degrees to just squeeze it in!
When I do the sums...I can't find any more EPs that Andrews Sell...as the largest 50 GSO - Sv (ap 68 degrees) =
12"Dob Fl- 1500/ep (50mm) MAG = 30X
APfov/mag = 2.26
2.26...still not enough. Other than turn to my ED80 to throw a shorter FL (560mm) into the equation to get a fov of a massive 6 degrees (is that right! OMG...awsome if that's true?)...what do you guys sugest.
I was looking at focal reducers for the 1st time. 0.5 both in the 1.25" & 2" version, however note that the only the 1.25" has an extension tube sold seperately? Do I need one for the 2" if I get that one as well.
How do the focal reduces work and what's the formula for working things out there? Do they effect quality for vissual?
Obtaining a 2"UHC filter for a budget price seems impossible. The cheap Bintel I use mainly on my 1.25" 25mm SV (ap68) works really well!!!
Seeing as I may need to aquire a larger 2" EP to obtain a larger FOV for my DOB...I've been strugling to find such a cheap 2" filter.
Perhaps as a newbie, my train of thought is all wrong...which is why I've tried to explain how I've been pondering on all this.
Other reasons, I'd like to get wider views in my EP, is for my new found passion of sketching.
Thanks for any help you can offer.
Cheers.
