Hi,
Just out of curiosity, if a scope is tested intferometrically for a PTV result, wouldn't dust on the lens have an impact? Since the deviations are so small anyway would'nt dust throw off the PTV?
Probably a stupid question but curious anyway.
Just out of curiosity, if a scope is tested intferometrically for a PTV result, wouldn't dust on the lens have an impact? Since the deviations are so small anyway would'nt dust throw off the PTV?
Probably a stupid question but curious anyway.
