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Not a good start
After all that I never achieved success. Set-up was the 10" LX200, Baader grating (207lpm) and Canon 300. For what it's worth:
- Don't think I achieved focus correctly, measuring the star image I found FWHM 18pixel, at 7.1 micron/pixel this is 127 micron. With a FL of 2500mm this gives 10.4 sec arc. Almost 3 times what I thought it would be!!
I'll use the Bat mask next time!
- The spectra of 2 mag stars were far over-exposed with a 20sec exposure.
The opposite spectra ( about 25% if the intensity of the primary) was close.. there's a couple which maybe useable..maybe.
- The specta are therefore washed out of detail and saturated!! On the gama Cass you can just make out the Ha emission
Oh well, back to the drawing board; I'll use the Littrow with the 20micron slit the next time.
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