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The reason for my confusion is that the manual says that the filter wheel takes 48mm filters(mounted),
the filters on the above link are listed as 2" filters
48mm is equivalent to 1.9 inches.
The 2" BVR and UBVRI filter sets on SBIGs website is listed as having a "48mm threaded cell" so I think I'm looking at the right ones, but I just want to be certain as Teleskop-Express make no reference to 48mm cells.
On a side note, why do SBIG use mm and imperial screw heads?
Thanks again
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