Orion field flattener question
All,
I have been given an Orion field flattener to try on my ED80.
However there seems to be a missing part, the M48 adapter.
My new camera came with a M54 threaded spacer but this doesn't fit the Orion.
Does anyone has the field flattener and can tell me what the thread is?
I have attached a picture showing the adapter.
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