Astrodon 3nm Tru Balance narrowband filters
I have an Astrodon 3nm Tru-Balance narrowband set which is too narrow for my setup.
These are not the latest version and not pristine but there are no scratches I can see and the front surface looks as good as my newer Baader set.
These sell for US $1000 on Astromart second hand.
Make me an offer over $1000 or swap for an ASI 1600 MM cool.
Last edited by Sunfish; 11-04-2020 at 11:33 PM.
Reason: Sold
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