Quote:
Originally Posted by Merlin66
Jeff,
What was the star being measured?
4.2A/pixel - That's interesting
I was getting 6.58A/pixel with the Baader 207lpm grating about 25mm infront of the T ring; about 60mm from the Canon 300 CDD.
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The star is etacar. The grating, 300l/mm, is possibly 50-60mm from the CCD.
I used both Ha and Hb for a calibration with 2 lines. The images included are full width frames from the ST7.
As these were taken through the 4" the star images were large at focus.
I could not move to capture more of the spectra as the star would move off the gtating.
I also imaged betcru and used similar lines from an alpori for line calibration and obtained similar figures (+/- 0.1l/p). I think the SA is a better system.
