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This End Cap has 2.0"" compression ring opening and a M47X.75 male thread for the Pentax SMC XW-40 Eyepiece

It is machined of the highest quality aluminum, and finished in our shop, keeping the same beautiful look and high precision quality that Starlight Instruments is known for.

Specifications

Use with FTF2500 series focusers
Known To Fit Pentax XMC XW-40 eyepiece