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My PST 90mm mod
Here are some pics showing my past & present PST 90mm mod.
I followed Ken's advice & started with 90mm Surplus Shed objective, some 100mm PVC pipe & an old focuser.
For ERF I used UV-IR (Rosco) filter with the Wratten#25 filter.
This worked very well, so I decided to do a "deluxe" version.
I obtained Skywatcher 90mm refractor , which was shortened by 90mm.
I also bought 90mm Baader D -ERF & GSO refractor focuser to suit.
Used Celestron C11 dovetail & some plumbing clamps to attache it to EQ6.
The whole set up works really well & is a HUGE improvement on my "sick" PST.
Many thanks to Ken for his excellent articles & advice - made this mod very easy to do.
Stage 2 mod will be happening soon, I hope...
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