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Barlow or new eyepiece ?

Started by joburg-astro, 01/17/2005 02:15AM
Posted 01/17/2005 02:15AM Opening Post
Hi all

I have an f/5 newtonian. I have a 20mm plossl that came with the scope and a 17mm Sirius plossl.

Should I buy a 2x barlow now or should I rather buy a 12mm plossl and get the barlow later.

Thanks in advance

Douw Gerber
Johannesburg South Africa
Posted 01/17/2005 08:43AM #1
A barlow's OK as a cost effective compromise, but it adds additional glass to absorb and reflect photons. Buy a 12mm now if you can afford it, and hold off on the barlow.
Posted 01/17/2005 05:09PM #2
If you have much focal length, I'd suggest you may actually be happier with a longer eyepiece, rather than a shorter.

And, by the way, I'd go for a Barlow..

Alex
Posted 01/18/2005 12:07AM #3
Thanks for the advice all - I will be purchasing a TAL Barlow then. I will get a 12.5mm eyepiece next after this.