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Mobius1
professor emeritus
Reged: 08/28/05
Posts: 700
Loc: Madison, WI / Gurnee, IL
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Is anybody using one, or have any opinions about which model is best? I was particularly keen on the Baader, but it is no longer manufactured. There is one from Rainbow optics... but it doesn't look as if it will work well with a DSLR. There is also this:
http://www.shelyak.com/ (look up the "star analyser")
which I really like the look of, and it has a thread for 1.25" EP's... however, the grating is 100/mm. I would think something like 1200/mm would be more desirable, to give a greater spread of the spectrum. Looking through Edmund and other optics catalogs, I mostly came across reflection gratings, which would take far too much work to setup into an effective spectroscope. The only practical thing I came across there was holographic diffraction film, 1000/mm, for $9, so I picked up a sheet- but it will probably leave a good deal to be desired.
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Martin
William Optics 66SD
Orion 100ED
Orion 120-ST EQ
PST-Ha
Celestron CGE 1100
Canon Rebel XSI with Astronomik filters
DSI-IIC
Homemade spectroscope in progress...
Yerkes Observatory Volunteer
(24" Cass on weekends)
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walt r
Post Laureate
Reged: 02/13/07
Posts: 3459
Loc: Doylestown, PA
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Check this post for starters. Then click on the poster's name and look at all his posts or send him a PM.
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Walt
Obsession 18" f/4.45 #1370 AN/SC
MK67 Deluxe 6" f/12 Mak-Cass, Super Polaris GEM, JMI MicroMax DSC
DIY 60mm f/6 Achromat
Cookbook 245 CCD
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