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90mm 0.5A double stacked solar telescope
Having finished the El Cheapo PST conversion, I'm already looking at ways and means of making further improvements...
By using a couple of 50/50 beamsplitters I can return the optical axis of the 90mm objective back along the top of the tube, position a 2" barlow as a collimating lens and direct the beam into the double stacked SM40/ PST.
This should give a 90mm scope with a resolution of 0.5A, a neat piece of gear!!
By reducing the amount of heat and light getting though to 25%, it's the equivalent of a 40mm objective, and maybe the ERF is not required!!!
This would make it a very cheap but effective solution.
Photo's to follow.
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