Thread: Spectroscopy
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Old 28-01-2009, 12:26 AM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,927
Looking good!!
I'd be interested in your set up.
Which telescope?
What distance between the SA and the CCD chip?
You seem to be able to get down below 400nm which is very good.
I'm just struggling a bit so far down in the UV. My "trials" with a 80mm cemented doublet definately showed you didn't need a UV-IR filter! The lens does it for you! I made the mistake of trying to use the Canon ( convenience!) and wondered what was going wrong.

The Canon is no good, drops to about 10%, the MX7c & DSI II are just below 40-50% efficient, the QHY5 drops to 30%, the webcam's are below 20% and the best so far are the Atik16ic at around 60% and the DMK21 at 50%
Keep it up; you're getting some good results!!!
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