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Home > Forums > ASTRONOMY > Beginning Astronomy? > Message #836489

Re: barlow basics

Posted by Ed Blankenship on 11/5/2017 3:58 PM in response to Re: barlow basics   (42 hits)
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Chris Kelly said:

Its a 6" Newtonian : 100 cm from primary to secondary and 152 cm from secondary to eyepiece... I have a good 25 mm eyepiece and an OK 23 mm that I use primarily. I also have a 4 mm & 10 mm that aren't very functional in my area ( 1 hour west of Philly).
I foresee a trip into lesser radiant areas for better viewing. .............. Thanks for the input. I think it is f5.


Another eyepiece to consider would be a 32mm eyepiece, so you would have a lower power than your 25mm and with a 2x Barlow, you would get a 16mm equivalent as well.

Cheers,

Ed

Thread:

Subject Posted By Date/Time Hits 
barlow basics Chris Kelly 10/28/2017 5:52 AM 91
Re: barlow basics Ed Blankenship 11/1/2017 9:04 PM 69
Re: barlow basics Ed Blankenship 11/1/2017 9:31 PM 53
Re: barlow basics Chris Kelly 11/2/2017 9:57 AM 67
Re: barlow basics Ed Blankenship 11/5/2017 3:51 PM 45
Re: barlow basics Ed Blankenship 11/5/2017 3:58 PM 42
Re: barlow basics Ed Blankenship 11/5/2017 4:31 PM 49
Re: barlow basics Chris Kelly 11/11/2017 8:19 AM 44
Re: barlow basics Thomas Dey 11/11/2017 4:45 PM 50
Re: barlow basics Chris Kelly 11/13/2017 6:44 AM 38

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