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Merlin66
21-09-2017, 07:27 AM
https://www.sciencedaily.com/releases/2017/09/170918222301.htm

Silvered mirrors plus overcoat....

Kunama
21-09-2017, 07:40 AM
They're just doing what Baader BBHS is but on a larger scale :P

lazjen
21-09-2017, 09:03 AM
It would be nice to know how much of a difference it would make, but it sounds good.

Wavytone
21-09-2017, 08:33 PM
Interesting. If you have a really good scope you plan to keep for many years, it would be worth having this done.

On a single mirror (newtonian primary) you could increase transmission 30% over an old aluminium coating. Older 2-mirror scopes - SCT's and Maks - where the coatings last quite well but nevertheless do slowly oxidise with age and after 10 years may may have transmission below 50% - this would restore them to better than new which would be a very noticeable improvement and presumably cheaper than a new OTA.

If it becomes reasonably available here I'd definitely have my Santel Mak done.

On a smallish mirror (star diagonals) with 99% dielectric coating forget it - there isn't any significant improvement to be had.

rustigsmed
21-09-2017, 08:42 PM
+1