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Forums > Back > next PZ lens test report: Sigma AF 150mm f/2.8 EX HSM DG APO macro OS (EOS)
Klaus
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#56
08-10-2011, 07:16 AM
[quote name='TheChris' timestamp='1312957220' post='10564']

Hmmm.. I haven't done the math, but during my study at polytechnical colleague we had a shop that could print us layer masks for an 35µm SU-8 process. The colleague did me a favor 4 years ago by ordering 180lpi custom encoder masks for me at that shop which I needed for certain optical position sensors.



What would be the resolution you need, either given in lines perinch oder millimeter line distance?



Christian

[/quote]





I would need to calculate this in detail but I reckon we would be talking about 20.000 lines per inch or so. White-Black coloring.



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next PZ lens test report: Sigma AF 150mm f/2.8 EX HSM DG APO macro OS (EOS) - by Klaus - 08-10-2011, 07:16 AM

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