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Originally Posted by bonox
My point was that the types of filters the OP was asking about do work
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Yes they work very well, particularly when used in telescopes over 4" in aperture.
Quote:
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Originally Posted by bonox
sure you'll never get a replacement for a dark site, but not all of us have silver spoons up our ....
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True; and not all of us are so ill informed as to recommend a filter thats totally unsuitable for a 70mm telescope, which is what the OP owns
CS-John B