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Mystery ring
I recently bought a secondhand Meade LX90 8" SCT.
As part of the package, I received 8 Super Plossl eyepieces, a 2x Barlow, CLS filter, 5 coloured filters & a moon filter.
In the case is a black ring, fitted with a knurled knob that screws through the ring, similar to an eyepiece holder. The ring is 1.25" internal diameter & about 5mm thickness, metal construct.
I have no idea what this is for, can anyone shed light on it's purpose please.
Thankyou
Carlton
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