Quote:
Originally Posted by Dennis
Hi Marc
Glad to hear of your success, my home made Bahtinov Mask has certainly delivered the goods so far.
I had a look at the sub frame of M17 and noticed that on the brightest star with the 4 diffraction spikes, the spikes seemed off-centre to the star disc? These spikes can’t be from the ED80 or C5?
Great image by the way!
Cheers
Dennis
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Correct. Forgot to mention it. This was taken at prime focus on a celestron 5" newtonian . QHY8 1min exposure. I did an 80mm mask for the ED80 and one 160mm for the celestron.