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next PZ lens test report: Sigma AF 150mm f/2.8 EX HSM DG APO macro OS (EOS)
#55
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
  


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next PZ lens test report: Sigma AF 150mm f/2.8 EX HSM DG APO macro OS (EOS) - by Guest - 08-10-2011, 06:20 AM

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