"Joda" wrote in sci.astro.amateur:

Anyone been contrast-enhancing their SCT by adding velvet or velour on
the inside (naturally)
of their SCT tube ?
Experiencing any problems ?
How about disassembling the SCT, f.i .the correctorplate ?



I think (the) non-reflecting black paint inside is better than velvet or
velour, which will keep reflecting light.

Take care that you re-assemble the corrector plate in exactly the same
position as when it was assembled before. Most of the time there will be
small cork supports installed in the factory between teh plate and the
ring support in the tube.
These cork supports must be placed back in the same way. If so, mark both
the position of the cork supports as the position of the corrector plate.

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