Quote:
Originally Posted by gaseous
You can get adjustable polarizing filters on Ebay for very little money - great for adjusting the amount of brightness you want.
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When I was using the Celestron 90GT WiFi Cosmos refractor, I found Moon was too bright for my eyes (at whatever magnification). I acquired a pair of polarisers, and I discovered that I did not like the decrease in resolution which they introduced (the image became a bit fuzzy).
Then I bought the cheap neutral density filters, maybe even from Bintel, and the image quality was fine. I think I got the 50% and 13% transmission, thus I was able to set 6.5% transmission, too, by combining the filters.
I was glad that I did not get the so-called "Moon" filter, as it was nothing else as the green filter, and I hate the colour tinge to the Moon image. (One could see the dark-green colour on the product picture of the filter.)
As a matter of fact, the Celestron "Moon" filter claims its transmission to be 13".