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Sensible purchase?

Started by bobclift, 05/17/2005 12:05AM
Posted 05/17/2005 12:05AM Opening Post
Three pairs of parfocal Leica 30mm diameter microscope eyepieces (FLs 10mm, 16mm and 25mm) with focussing adjustment, for the price of a pair of the cheapest Naglers. Have I been silly and got things that aren't particularly well suited to the job? Despite an interest in astronomy since always and a degree in astrophysics this is my first telescope, and my line of reasoning behind choosing them over trad astronomy EPs didn't get much more sophisticated than 'An eyepiece is an eyepiece is an eyepiece, innit? Mmmmmmmmm, Leica. Mmmmmmmmm, cheap. Ish.'. That, and finding out that their current list price is nearly £2k.

Only used them up to now with my ickle 700mm f8 telephoto lens (pretty happy with the views of my lousy suburban south east UK skies so far, GRS and Cassini divn remain elusive however), the telescope fairy left an 8" Schmidt-Cass OTA outside my door this morning though grin This also explains why it's now cloudy and raining :C
Posted 05/17/2005 03:43AM #1
Bob,

I played with microscope eps in my younger years when ATMing was the way many of us put our gear together. In my experience, microscope eps had pretty narrow fields of view (e.g. AFOV 25°). I believe this was simply because a narrow AFOV matched to the much smaller objective of the microscope and gave optimal exit pupils at high power.

Anyway, the on axis views of planets was pretty good, but the narrow FOVs made my Erfles and 40°Kellners seem like comparing plossls with Naglers today.

Enjoy the experiment, however, perhaps microscopes and microscope oculars have evolved a lot since then (about 25 years ago).

Randy

Randy Roy