Quote:
Originally Posted by JA
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Thanks JA,
They used a camera with 10 micron pixels and the two star images were about 120 pixels apart.
If using a planetary camera with pixels around 3 microns, a 1 arc minut wedge would produce more than enough separation.
When I first measured my finished blanc, I found a wedge "error" of about 50 microns, corresponding to an angle of 206".
During fine grinding, I reduced the wedge measurement to about 11 microns, corresponding to an angle of 45". That should produce a deviation of about 69", or 1.15'.