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Old 16-06-2016, 11:49 AM
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codemonkey (Lee)
Lee "Wormsy" Borsboom

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Join Date: Jul 2013
Location: Kilcoy, QLD
Posts: 2,058
Measuring field flatness without stars

I imagine there's a near infinite number of ways to do this, some better than others, some requiring specialist equipment, some not.

We've had lots of cloud cover here lately which means no chance to get out under the stars. I'm wanting to confirm spacing for my flattener so that I can order some custom adapters, which can take a few weeks to get made, plus shipping time.

Is there an especially good, yet simple way to test for this indoors? I'm thinking about just printing off a sheet of paper with a bunch of lines that are close together, take some subs, then checking for any apparent distortion.
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