PST modification - idiots guide

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
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Re: PST modification - idiots guide

Post by Montana »

Thanks guys for the OK, I will start ordering my list now. Hopefully pick everything up at the IAS show in November. Is anyone going?

Alexandra


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Re: PST modification - idiots guide

Post by Montana »

Hi guys, I have finally put everything together but not in the order I expected. Unfortunately the micro focuser I bought only has a screw in top so nothing fits in it apart from my 2" -1.25" adaptor. Are you allowed to put the blocking filter directly behind the etalon? I can obtain 20cm in length in this combination only.

ImagePST Mod by Alexandra Hart, on Flickr

Alexandra


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Re: PST modification - idiots guide

Post by bart1805 »

Yes Alexandra, that is no problem. A bit further back could be nice to see more of the sun (when the BF is small), but for HR imaging it is fine.


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Re: PST modification - idiots guide

Post by marktownley »

Looks good, it will work.


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Re: PST modification - idiots guide

Post by Carbon60 »

Looking good, Alexandra.

Stu.


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Re: PST modification - idiots guide

Post by AndiesHandyHandies »

Hi

It will vignette the image badly moving it right behind the etalon.

If you move it put it before the CCD.

I have done a full PST Mod and I am thinking of taking the blocker I do not use out of the abandoned PST and placing it in front of a small CCD camera for prominences set up.

Andrew


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Re: PST modification - idiots guide

Post by marktownley »

What's the clear aperture on the Solarscope blocker Alexandra?


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Re: PST modification - idiots guide

Post by Montana »

I don't know Mark, according to the chart ??? https://solarscope.co.uk/filter-systems/ :lol:

I'll have to measure at home tonight :)
Alexandra


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Re: PST modification - idiots guide

Post by Montana »

OK Mark, it is 35mm

Alexandra


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Re: PST modification - idiots guide

Post by marktownley »

AndiesHandyHandies wrote: Tue Jan 14, 2020 8:50 am It will vignette the image badly moving it right behind the etalon.
You wont have any vignetting issues with the solarscope blocker, it's bigger than the 20mm aperture of the etalon.


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Re: PST modification - idiots guide

Post by AndiesHandyHandies »

Ah. Thanks Mark.


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