Quote:
Originally Posted by Peter Ward
Now that I've has some first hand experience in using a SHG, the
appreciation of just how much craftsmanship is required to produce
a SHG image like this is significant.
Wonderful stuff
My new QHY IMX678 based camera arrived today.....if it produces data that is
of similar calibre (i.e. awesome ) I'll be over the moon. 
Again, excellent stuff Maurice.  |
Thanks Peter..
I've just seen your most recent SHG effort & it looks great.
You have taken leaps forward in just a few days.. well done.
Quote:
Originally Posted by Saturnine
Excellent image Maurice, I really like the way that the spectoheliograph contrasts the filaments and active areas.
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Cheers Jeff.
The contrast is due to the extremely narrow wavelength range sampled by the SHG. With a 2400l/mm grating and say a 200mm fl collimating lens its about 0.05A/pixel. Far narrower than your average Etalon offers..