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Coronado SolarMax II 60 Double Stack

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#1 Newtonian6

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Posted 03 September 2019 - 04:54 PM

I have access to a Coronado SolarMax II 60 Double Stack. The manual is extremely vague on how to focus and tune it. Any advice/instructions? It seems like there is a not a lot of information about how to operate it online either. Thanks!



#2 BabyPepper

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Posted 03 September 2019 - 05:21 PM

put in the blocking filter,  point it at the sun, and play around until you like what you see smile.gif

 

There is no right and wrong, because its different for every scope etalon.   

 

but you should Basically keep the front etalon off,   and turn the rear of the scope first until you see at least prominences or a filament..    Then put on the front etalon, and adjust the dial on the front etalon until the image is still showing the prominences or the filaments become visible again,  then rotate the whole front etalon until any reflections go away from the solar disk.

 

After the front etalon is set in tune with the internal etalon,  you should not have to make adjustments to the front etalon anymore and the rear tuning controls should be the main priority.

 

 

unfortunatley you might have to adjust the tuning pin, based on your geographical location .  it must be tweaked the higher above sea level you go, but typically you should be okay.


Edited by BabyPepper, 03 September 2019 - 05:24 PM.


#3 MalVeauX

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Posted 04 September 2019 - 04:59 AM

I have access to a Coronado SolarMax II 60 Double Stack. The manual is extremely vague on how to focus and tune it. Any advice/instructions? It seems like there is a not a lot of information about how to operate it online either. Thanks!

Heya,

 

Take the double-stack module off (it threads on/off) first. Start with just the scope with its internal etalon, with the blocking filter in place and a wide eyepiece (20~25mm should be fine).

Point it at the sun using the sunfinder on its spine. Once you have the sun in the eyepiece, focus it until the edges of the disc are sharp.

Now gently adjust the tuning lever near the focuser of the primary etalon. Go through the whole range. If you see a filament/plage pop out, you're close to being on band.

Note that position. Once you find the highest contrast of features like the plage/filaments, you're in a good spot.

Now thread on the double stack module.

There's a rotating side-dial that adjusts tilt. When you initially look through it, you'll notice a very bright reflection. The tilt mechanism is to move that reflection just off the disc. Do this first.

Once the reflection is off the disc, you can tune the 2nd etalon. The tilting shifts the etalon towards the blue wing, so its tuning position will be different than the primary.

Adjust the tuning ring (it's the front dial of the opening into the etalon) until you see the highest contrast (really easy on features like a plage/filament).

Note the position.

Ready for your session.

 

You'll have to do that each time you take the front etalon off for any reason because it will be in a different position probably. Or you can leave it together and tuned at all times for your location.

 

Very best,


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