Re: [ATM] Eyepiece Question

[Jarvis Krumbein <jkoptic@juno.com>]

For what you would spend on eyepieces, you might be better off building
an equatorial platform so the object stays in one place.  Mine (home
brewed) kept Mars in the field of view for over 15 minutes at a time when
using a 12mm Plossel with a 2X Barlow during the last close approach.  It
would have done even better with a careful alignment of the pole.  It's
also nice not to have to re-aim the scope when you have several viewers

Jarvis Krumbein
. 
On Sun, 15 Apr 2007 15:21:48 -0400 G Gagne <gagne41@clearwire.net>
writes:
> I'm in need of a short focus eypiece to replace a 7.5mm plossl for my 
> 
> 12" f/5.6 non-tracking dob. Whenever I used the 7.5mm eyepiece the 
> field 
> of view seemed quite small with not much eye relief and whatever 
> object 
> I was viewing quickly drifted out of the field of view. This made it 
> 
> quite difficult to observe planets for more than a few seconds. I 
> realize that higher powers result in smaller fields of view but do 
> the 
> more expensive eyepieces like Televue give you larger fields of view 
> and 
> greater eye relief? Enough to justify their expense? I would 
> appreciate 
> comments from more experienced observers.
> 
> Gilbert Gagne
> Port Orange, FL
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> 
> 
 
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