N00b here looking for a bit of advise. I had been saving up for a 8' Dob for X'mas as my first telescope, but as luck would have it, a mate from work was giving away his Celestron Astromaster 70AZ for free so I jumped at the chance and have been enjoying the night skies with it !!
The telescope is pretty old (my friend also got it second hand) so it has a few issues.
a) The finder scope also seems a bit useless as the battery cover is not there. I am not sure if it the cover can be replaced? Should I get a new finder scope? It doesn't look like the current one can be removed from the scope though? As I cannot see the red dot I am currently just moving the telescope roughly into position and moving it around to find my target. It's been fun
b) I am not sure if the eye pieces I have are the best. I believe they are the ones that came with the scope. A 10mm and a 20mm. But they've served me well so far with good views of the Moon, Jupiter, Saturn, Mars etc.
I am looking at making a few purchases to enhance my views and am looking for some advice on what those items might be (budget friendly too hopefully !)
Seems like the best options are
1) A barlow lens. Not too sure what the best Barlow would be for me. The website says the highest useful magnification is 165x for this scope. But reading through the posts here it seems to be more like 50x-60x per inch of aperture so that puts it between 138-165.
2) New eye pieces (am I better off just getting higher powered eye pieces over a barlow)?
Both 1, 2 appear to be future proof purchases as I could use them with the Dob too eventually ?..
3) Moon and Solar filters
4) Maybe the diagonal as it's a plastic one and reading through the forums, suggests a better one will improve things (then again am I better off saving that money for the Dob?)
5) New finder scope?
Details and photos of the telescope below.
Celestron Astromaster 70AZ
Aperture 70mm (2.76")
Focal Length 900mm (35")
Focal Ratio f/13
Focal Length of Eyepiece 1 20mm (.8")
Focal Length of Eyepiece 2 10mm (.4")