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Old 09-11-2005, 12:07 AM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,927
Upgraded Littrow Spectrogragh

I've built a couple of spectroscopes using 1200 lpm gratings based on an old BAA design and now want to uprade to a Littrow design based around a 200mm photographic lens, similar to the WPO design of Maurice Gavin. This design really needs a 40 x 40mm reflecting 1200 lpm grating.

See http://www.astroman.fsnet.co.uk/newspec.htm
and http://users.erols.com/njastro/faas/
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