Hello, if this is covered elsewhere I cannot for the life of me find it, so here goes.
I'm trying to use the really old Polaris 8x50 Polaris right-angle finderscope that came with the Compustar 8 I bought way back before Halley’s Comet. It requires a battery for the illuminated crosshairs. I can’t determine what battery(s) it takes. Obviously small round and cylindrical…. the battery compartment is in the shiny cylindrical bit.
The online Compustar manual I found doesn’t mention the battery type.
Photo of the finder attached. Anyone know?
Thanks!