Modern cameras are usually characterised by extremely short optical heights, in order to be able to be mounted on various telescope constructions. The old T-2 standard with 5mm thread depth is a hindrance to this. To take care of this new development, all new Baader T-2, M48 and M48 parts are delivered with the new 3 mm standard.
M48 Extension Tubes (5 / 7.5 / 10 / 15 / 30 / 40 mm)
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GERALD PARHAM / February 8, 20241 Answer
Robert Warner / July 25, 20231 Answer