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Hotech field Flattener question
Calling anyone with a Hotech field flattener
I have a Skywatcher 80ed and just bought a Hotech Field Flattener, unfortunately no instructions.
I presume i just insert it into the optical tube and tighten the rings? (not scope screws).
I'm shooting with a canon 500d would i need any other extension tubes to eliminate coma or should the flattener be enough?
Cheers Carl
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