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Coronado SolarMax II Telescope PST 40 Double Stacking Filter with TMax Tuner
Starts at $599.00
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(2 reviews)
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Better contrast but lower resolution

by Legacy Reviewer, Verified Owner Written on June 9, 2012
Contrast of features on the sun is much better when comparing with the standard PST. I can recognize much fainter dark filaments for sure. But as far as resolution of images through the double stack filter is concerned, smaller features on prominences are blurred. I usually use an eyepiece of 6mm focal length with the PST, but with the double stack filter set up on the PST, I have to use 10mm instead for comfortable view because of the lower resolution. ...
Would recommend: No
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SM60II DS Etalon

by Legacy Reviewer, Written on May 28, 2012
I purchased this as an addition to my SM60II, and not without some trepidation either due to the added cost.
My fears were however calmed by the views; it pretty much does everything it says on the tin in that there is "higher contrast and greater surface detail". Control is easy, essentially you just work forwards from the focuser with each control point until you get the views you want. I have yet to image with mine, visual only.
One comment in attachment, this is supposed to screw directly onto the SM60II; which it did do with a little persuasion and addition of some very light oil, however, don't let something like that spoil your enjoyment of a worthwhile enhancement on standard ...
Would recommend: Yes
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Comments on 2 User Reviews of Coronado SolarMax II Telescope PST 40 Double Stacking Filter with TMax Tuner