On Mon, 29 Sep 2003 15:07:32 -0400, guid0 wrote:


Actually, since maginfication is determined by the focal length of the
scope it does matter.

No, magnification is determined by the ratio of scope focal length to EP focal
length. Magnification matters, focal length doesn't. The magnification can be
adjusted by choice of EP more easily than by changing the telescope focal
length.

Certainly, as Jon pointed out, there may be practical reasons for matching
telescope focal length to your available EPs to give a good range of
magnifications and reasonable exit pupils. My point was that you can't say (as
did the original poster) that shorter focal lengths are better than longer ones
for DSOs.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com