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My 16" dob beats every refractor I own hands down. But that's going a bit off topic.
Getting back to field curvature, my views through my SW120 F5 were somewhat ruined by this. For photography use I use an Orion field flattener for it which works well. My question is do they make field flatteners for visual use with fast refractors? The Orion flattener has a screw thread where a T-ring screws on, does anyone make adapters to fit an eyepiece to this?
I might MacGyver something up later to see if I can do this, though it will be straight through not with a diagonal.
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