Thread: Helix Nebula
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Old 25-10-2011, 12:07 AM
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alistairsam
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Quote:
Originally Posted by Suzy View Post
Hello ---- I don't know your first name?

My 2c worth...

Go the 20mm GSO- at that f/length, it will be used a lot. Your 30mm probably won't get a lot of use (I know mine doesn't), tho still a useful addition to the kit never-the-less. The 30mm is mainly good for w/field views for finding things. So if you are going to filter anything, I'd be throwing the filter on the 1 1/4 eyepieces. I find the 14mm range also a necessary focal length which I use mostly.
Hi Suzy,
Its Alistair.
thanks for the info, its pretty much what i concluded as well,
Alex, i'm guessing your 30mm gets the most cause you love widefields!
i'm getting a 2" 26mm Agena EP (70 deg FOV) from the classifieds here.

If I can get a 2" OIII filter I'll try it with the 26mm, else will get the 20mm 1.25" EP and a 1.25" OIII.

after all this talk I can't wait to catch some views as well. but if only we had clear skies, sigh.

I will do some reading, but what type of nebulae are good with OIII amongst the different types of nebulae, planetary, emission, reflection or the others?
same with Ha filters? what type of nebulae would they be used with?
once I understand that, I'd know what type of targets to look for and what filter to use.

thanks
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