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Transit of Mercury in the Spicule Layer. Phil took this great image with his Quantum 6 Scope, Solar Spectrum etalon and PGR Camera.

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Improvements to your PST!

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Merlin66
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Improvements to your PST!

Post by Merlin66 » Sun Sep 23, 2018 10:30 pm

Sylvain Weiller, well known for his excellent images with the PST, has fitted his PST with a x1.5 photographic converter, which he claims has increased the focal length from 400mm to 600mm and gives better definition and resolution.
Interesting!!!
http://sweiller.free.fr/PST/indexPST.html

Note: the front thread of the PST is a 52mm thread.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

solarchatted
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Re: Improvements to your PST!

Post by solarchatted » Sun May 26, 2019 9:12 am

I tried a 2x2 [used on a Canon camera] and I cannot focus. Tried everything within my knowledge to focus. I just cannot.

Last week I also managed to attach a SCT 10:1 focuser [viewtopic.php?t=26069#p235640] I rarely used, in place of the PST one and it is very good - view is a lot brighter thou ... maybe too much.
Once again after I managed to focus visually and with 178M, I attempted again to use the 2x2 - could not focus.

I know it is the 'poor man' choice, but I am poor enough to attempt that!
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Re: Improvements to your PST!

Post by solarchatted » Mon May 27, 2019 2:31 pm

... and the reason I had problems might be its focal length!
I ordered another one, let's see what happens ... if no results, it means I wasted a total of £. 50!
Pffff !
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Re: Improvements to your PST!

Post by solarchatted » Sun Jun 09, 2019 3:24 pm

Got other one but only managed to check it out quickly - did not have time + weather rubbish and this one 'seems' to work.
Next time I have steadier weather, I will test it properly. I am no expert of optics, but as I understand it is to do with 2x2 FL and this one seems to mach PST better.
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Re: Improvements to your PST!

Post by marktownley » Sun Jun 09, 2019 3:32 pm

Coming into this thread from a tangent here. When you're talking about 2x2 are you on about 2x2 binning?
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Re: Improvements to your PST!

Post by FRAZ » Sun Jun 09, 2019 8:00 pm

I think they are referring to extender lenses for cameras.

Like this bad example.
https://www.amazon.co.uk/TOP-MAX-2x2-0- ... B00LM5887O
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Re: Improvements to your PST!

Post by marktownley » Mon Jun 10, 2019 5:40 am

Ahhh, got it, thanks.
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