I have, for the most part, overcome the vignetting problem in my SHG.
THANK YOU SPECTRAL JOE for pointing out the importance of a field lens!!!
My system at the moment:
Astro-Rubinar 1000mmfl f10 catadioptric telescope.
Pentax Takumar 200mmfl f5.6 + Televue Powermate 2.5x collimator (~ 500mmfl) + 254mmfl EO achromat field lens.
Schneider Tele-Xenar 135mmfl + Komura 2x tele-extender camera lens.
25 um slit
2400 /mm holographic grating (25mm x 50mm)
A photo:
Here are images at H alpha and H beta (more wavelengths to follow).
H alpha:
H beta:
Cheers.
Peter.
03Jun2014 PZ's SHG Images: Ha Hb
- marktownley
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Re: 03Jun2014 PZ's SHG Images: Ha Hb
Oh yes!
Way cool Peter!
Way cool Peter!
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!
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Re: 03Jun2014 PZ's SHG Images: Ha Hb
Hi Peter
wow
wow
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
from 7 am - 7 pm http://www.nanosys.ch
from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa
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Re: 03Jun2014 PZ's SHG Images: Ha Hb
Thanks Peter that's a lot of connections in the set up and a great result
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Re: 03Jun2014 PZ's SHG Images: Ha Hb
Lovely images, Peter.
Looking forward to seeing other wavelengths too.
Stu
Looking forward to seeing other wavelengths too.
Stu
H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
Re: 03Jun2014 PZ's SHG Images: Ha Hb
H beta is so cool, I wish for some one to make a narrowband filter for this!
Chris
Chris
Chris Schur
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Birch Mesa Observatory, Payson Arizona
Clear Creek Canyon Observatory, Happy Jack, Arizona
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Birch Mesa Observatory, Payson Arizona
Clear Creek Canyon Observatory, Happy Jack, Arizona