PST Mod fergling

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AndiesHandyHandies
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PST Mod fergling

Post by AndiesHandyHandies »

Hi,

A sunny, scudding clouds and windy day. Blowing the Rumak180 about. Fortunately my 'meat machine' imaging processing algorithm was up to viewing.

Tried out my little bino-viewers first. Saw some RSPhoto quality surface details.

In the 5x could see the whole Sun and quite bright and contrasty.

Realised I am missing a pair of 8x out my set of eyepieces which might be a good magnification.

I just bodged the 1.5A Omega Bobs filter used as a blocker in a tilter at maximum angle to start with. Had a play with it from there to flat and back.

Moved over to the 25mm Clave'. Eventually came to the conclusion maximum tilt was OK.

I tried the CPL and crossed-polarisers. I have seperated the re-collimating lens from the etalon and I had the idea to slide the CPL adapted to a 48mm filter ring into the back PST adapter then held in by the 2" diagonal nose piece with the re-collimator in a plastic Celestron/SW moon filter adapted to it with a Blue Lighting 48mm to 28.5 mm adapter.
A big improvement and no major of axis disks. Still a small close by reflection, I assume off the etalon. And some diffuse circular features now.

Nice view of the one large prom which looked like a chromosome with a fuzzy bit next to it.

Interesting to compare the Rumak180 PST mod to the 90mm with Quark Prom next time the seeing is better.

Cheers. Andrew.


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Re: PST Mod fergling

Post by marktownley »

Sounds like you were having fun Andrew!


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Re: PST Mod fergling

Post by MAURITS »

Nice to read.


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AndiesHandyHandies
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Re: PST Mod fergling Log Stardate 2021/03/29

Post by AndiesHandyHandies »

Hi

Scudding clouds, sun and wind. Not for nothing is the nearby road junction is called 'Windy Gap'.

Having played with the blocking filter tilt I have a miasma.

Going to the full posiible tilt without the adjusters falling out washed out the details.
So somewhere there must be an optimum over-lap.
Need a good day to tilt and clock the blocker to get the best result.

I could see the large proms with nice brightness and contrast.

Cheers. Andrew.


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Re: PST Mod fergling

Post by Montana »

Glad you had a good view of the proms Andrew :hamster:

Alexandra


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Re: PST Mod fergling

Post by AndiesHandyHandies »

Hi

Had a play trying different tilts of the blocking filter.

And all combinations of polarisers.

Got rid of the miasma.

Just a little off axis faint reflection I assume off the etalon. And one faint one half way off, possibly off back of etalon and then blocker.

Nirvana I think now.

Cheers. Andrew.


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