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  #1  
Old 28-01-2018, 10:51 AM
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Merlin66 (Ken)
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Mods to ED80 - PST double stack

As you may know I use an SM60 etalon on an ED80 for solar observing.

I also use a PST Mod on a 102/1100 Telescope Service (Kunming) refractor.

I have made adaptors to allow the SM60 to be mounted on the 102mm and it gives great double stacked performance, but with a limited FOV due to the long focal length.

Looking at the OTA of the ED80 I found by removing the focuser and replacing it with an adaptor plate (identical to the one on the rear of the 102) I could add the PST mod to the ED80 - this should, with the 600mm fl give double stack full disk observing.

The adaptor (thanks to Les!) is about to be fitted - probably early next week due the the long weekend and family commitments....
This will give the necessary f10 for the PST mod;with a SM60 front etalon on the ED80.

Keep you posted.
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  #2  
Old 03-02-2018, 08:10 AM
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Merlin66 (Ken)
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OK
First light this morning with the SM60+PST Mod double stack on the ED80.
Majic!
It seems to work well - small filaprom, active area and impressive Proms easily visible.
The surface detail is as expected with a DS.

So far I'm impressed - good full disks views with 15mm TV.
Just waiting on the return of my "hot" MSI computer - another SSD drive failure!!! -should be here Monday, then can try the ASI 174.
Stay tuned.
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  #3  
Old 03-02-2018, 09:44 AM
Saturnine (Jeff)
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Don't tempt me to go down the DS path, though an BF10 is not out of the equation. Looks a very nice set up Ken. May we see some pretty pictures sometime of the prom and chromosphere detail now visible with the scope.
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  #4  
Old 04-02-2018, 07:56 AM
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Merlin66 (Ken)
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Unfortunately for your wallet, DS is the way to go to maximise the detail visible in Ha. Certainly pulls out the surface detail with enhanced contrast.
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  #5  
Old 06-02-2018, 10:32 AM
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Merlin66 (Ken)
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OK, the "hot" MSI laptop finally arrived back.....
Now on my third SSD drive
I still need to re-install all the camera drivers and software.
Hopefully will be up and running very sooooon.
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  #6  
Old 14-02-2018, 10:41 AM
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Merlin66 (Ken)
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Through broken cloud, poor seeing
ASI 174MM + FC+AS3!+Registax5
Also with x2.5 PM

My solar observatory is now over ten years old; 80l grey tub, gaffa tape hinged lid, held open with fence wire finished with a dark sheet. Works very well for me.
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Old 14-02-2018, 12:00 PM
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h0ughy (David)
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Aaahh the shroud , nice bit if kit. Do you have a small fan in there as well. What are the peanut butter lids for?
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  #8  
Old 14-02-2018, 01:43 PM
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Merlin66 (Ken)
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The Vegemite lids allow me to adjust the tilt on the front etalon from the eyepiece position.
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  #9  
Old 14-02-2018, 03:46 PM
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traveller (Bo)
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Quote:
Originally Posted by Merlin66 View Post
The Vegemite lids allow me to adjust the tilt on the front etalon from the eyepiece position.
Now that's "remote" control to a new level!
Bo
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Old 14-02-2018, 03:55 PM
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Merlin66 (Ken)
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