Nature of Coronado external etalon tuning
-
trwinship
Nature of Coronado external etalon tuning
On Coronado Solarmax II scopes, why does the external etalon, used for double stacking, use both a tilt tuner and a compression (RichView) tuner? Thank you once again for your expert advice!
-
Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: Nature of Coronado external etalon tuning
That's a very good question!
The original SM60 external etalon only has the T-Max adjustments.
The marketing hype says the Richview tuning is more "refined"
(I use a double stack of two original SM60 external etalons on an ED80 - works great...)
The original SM60 external etalon only has the T-Max adjustments.
The marketing hype says the Richview tuning is more "refined"
(I use a double stack of two original SM60 external etalons on an ED80 - works great...)
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
-
swisswalter
- Way More Fun to Share It!!
- Posts: 17948
- Joined: Thu Feb 06, 2014 4:28 am
- Location: Switzerland
- Been thanked: 1 time
- Contact:
Re: Nature of Coronado external etalon tuning
Hi Tim
a good question indeed. I have a SM90 with T-max and rich view, the rich view is really fine tuning , the t-max is basically moving the ghost sun away.
a good question indeed. I have a SM90 with T-max and rich view, the rich view is really fine tuning , the t-max is basically moving the ghost sun away.
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
Re: Nature of Coronado external etalon tuning
An interesting subject. I have a redundant sm 11 double stacker with Rich View which I used on my PST. I have rigged it up in an experiment to my new LS60 but could not produce an image, I think that the Rich view adjustment makes it unsuitable for use. Any advice would be appreciated.
Lunt LS60THa / B1200 / LS60Fha / DMK51AOU2 / DMK21AOU2 / Revelation 6 & 8" RC / Opticon Minitower 11 & Startracker / Mad Red Setter and understanding Wife
Re: Nature of Coronado external etalon tuning
Yep; sell it to me cheap, it's no good to you now Robin...
How much?
How much?
Lunt LS60THa / B1200 / LS60Fha / DMK51AOU2 / DMK21AOU2 / Revelation 6 & 8" RC / Opticon Minitower 11 & Startracker / Mad Red Setter and understanding Wife
-
swisswalter
- Way More Fun to Share It!!
- Posts: 17948
- Joined: Thu Feb 06, 2014 4:28 am
- Location: Switzerland
- Been thanked: 1 time
- Contact:
Re: Nature of Coronado external etalon tuning
Hi Leif
I tilt with my SM90 all over the place
I tilt with my SM90 all over the place
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
-
Merlin66
- Librarian
- Posts: 3972
- Joined: Tue Dec 13, 2011 1:23 pm
- Location: Junortoun, Australia
- Has thanked: 174 times
- Been thanked: 619 times
- Contact:
Re: Nature of Coronado external etalon tuning
Lief,
The etalon only tilts one way from the "flat" and that is towards the blue.
Etalons (both Lunt and Coronado) are "factory set" just above the Ha (red wing) and then tilt into Ha and then on to the blue wing....
The etalon only tilts one way from the "flat" and that is towards the blue.
Etalons (both Lunt and Coronado) are "factory set" just above the Ha (red wing) and then tilt into Ha and then on to the blue wing....
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
-
brianb11213
Re: Nature of Coronado external etalon tuning
Speaking of this particular unit, can it be mounted in a refractor AFTER the objective, to get full aperture?
Yes ... if surrounded by telecentric lens packages ... you'd also need to figure out how to access the tuning mechanism if embedding the etalon into a tube.
Yes ... if surrounded by telecentric lens packages ... you'd also need to figure out how to access the tuning mechanism if embedding the etalon into a tube.