dan Posted April 11, 2008 Report Share Posted April 11, 2008 Hi: I have a used system 89 i was getting dark spots on my prints i called the technician he performed a prnu said everything was ok and now i have more spots than ever! Can anybody tell me which is the proper way to do a prnu?Thanks. Quote Link to comment Share on other sites More sharing options...
davidlam Posted April 12, 2008 Report Share Posted April 12, 2008 will you post a photo with spots so we can see what you're talking about Quote Link to comment Share on other sites More sharing options...
helper Posted April 12, 2008 Report Share Posted April 12, 2008 Before performing a PRNU the whole optical system( lamphouse , filters ,lcd surface and lenses) need to be perfectly clean. If not then, the prnu calculation will take into account imperfections(dust etc) that may fall off/move later. Giving spots that are no longer there! Sounds exactly what you have. Quote Link to comment Share on other sites More sharing options...
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