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Subject: [M]: Eyepiece selection for 10" f/6.3
From: Thomas Wideman
Reply To: mapug@shore.net
Date: Mon Jan 05 17:44:45 1998
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Hello All,
I am looking for tips on good eyepieces for my 10" f/6.3 LX200.
I currently have the following EPs (they came with the scope), for which I've done the math for mag and true field:
EP mm af mag tf
------------------- -- -- ---- ---
Meade SP 26 26 52 62x 51'
Meade SP 15 15 52 107x 29'
Meade UWA 14 14 84 114x 44'
Celestron SMA 25 25 54 64x 51'
Celestron Plossl 10 10 44 160x 17'
Currently, I use the UWA 14 almost exclusively. It provides a nice field and magnification for mid-range use. I also bought a TV 3x barlow, but have not used it much.
Here are the big questions:
1. First, I want a low power EP that will give the largest true field possible without a nice view of the central obstruction.
2. On the other end, I would like an EP that would provide the highest power usable on a regular basis; in other words, I don't want a 4mm if I can only use it 10% of the time due to seeing. (I'm in the Dallas, Texas area if that helps with atmospheric considerations.) How are the Meade UWAs and Naglers towards this end of the spectrum? I like the feeling of the wide true field (for instance, the SP26 and the UWA have almost the same field while the UWA is twice the mag) and wonder how it carries over to higher power.
3. For these, please consider I currently use a 1-1/4" diagonal as supplied with the scope. Would a 2" diagonal gain me anything? If so, what's out there and what's good? Do they come with 1-1/4" adapters? (I [obviously] know nothing about 2" diagonals.)
I've checked the archives, but have been more confused than anything, so that's why I'm (re)posing the question. Specific recommendations for high and low power EPs for the 10" f/6.3 would help the most. Thanks.
Tom Wideman
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Thomas A. Wideman http://home.earthlink.net/~twideman/
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