Quote:
Originally Posted by strongmanmike
Not sure on the throughputs of the 3.5nm Baaders but I would assume they would be less again..?
Mike
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Being that they do not supply any information other than fwhm, I would assume so as well.
fwiw, There is also Omega optical who do a 0.7nm H-alpha in a 2" format. The transmission is around 80% and is realistically only useful in focal lengths above f/7
Here it is:
http://www.ebay.com.au/itm/Optical-F...item233584cb30