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H Alpha filters
I got a few 2" Baader filters and when I tried to use them in my
Lumicon Multiple Filter Selector found that every one of them
had "oversize" threads. The Astronomic filters fitted perfectly.
I ended up removing the glass filters from 4 Baader filters and
getting an a professional optician to grind them down to fit into
some cheap filters I got from Bintel. The Baader glasses were all
0.3mms oversize compared to the glasses that came out of the
Bintel filters. When I coimplained to the American supplier they
said that they had measured theri stock and I was wrong - well
I am never going to buy a Baader filter again for certain. It was
a costly mistake. Anyone who want to dispute this can have one
of the Baader filterholders (on loan) to try themselves. They did
fit into some 2" things, but the critical thing they did not.
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