[ATM] Let's say you have on eye piece choice...

[Mel Bartels]

> Let's say you only want to buy one *expensive* eye piece for Sidewalk
> Astronomy - That is to say, if I want to spend $300 to $400 for an
> eye piece that will be used on a 12.5 f/5 truss dob set up for the
> crowds to look through which size / brand will give the crowds the


Hmm, let's say that one might want to purchase the most inexpensive eyepiece
for public viewing, since the glass will become quite dirty every evening
and scratched from time to time.  A super wide field of view is hard for the
public to get the correct spacing to enjoy the entire FOV, and exit pupil
needs to be kept reasonable along with long eye relief.  Focus is a huge
problem, so best to use a longer focal length instrument.

Here's an idea that the public loves: a video eyepiece with a little
display.  Then all the eyepiece problems mentioned above go away, as well as
lack of dark adaptation issues.

Mel Bartels