On Wed, Jul 20, 2016, at 00:44, Torsten Bronger wrote:
> I haven't had an OLED screen in my hand so far but evenness is only > one thing. The other thing is independence of direction. If you > tilt the screen, it must have the same brightness, with a tolerance > smaller than what could be evaluated with the naked eye. > > Therefore FWIW, I would not accept images taken with an OLED screen. > If you put a sheet of paper inbeween, it might be okay, though. Yes, a sheet of paper or other diffuser should still be used (I was using a piece of Roscolux diffuser gel), even if only because of the clear glass in front of the actual light source, which could otherwise let ambient light in around the edges... sorry, I didn't mean to imply otherwise. Maybe the next time I'm profiling a lens for vignetting I'll try various experimental methods along with the less convenient known-good ones so the results can be compared, since this is something that people (including me) have questions about. > So I should send you access credentials? Sure... I would feel more confident if there could also be some kind of peer-review among the people involved, even if only informally. I'll be busy for possibly the next week, and need to rebuild the deps for the script on a shiny new Slackware system, but should be able to contribute after that. As a side note, while you're updating the profiling instructions, it might be worth expanding a little on the importance of profiling vignetting at different focus distances depending on lens type. I found, for instance, that applying the correction for infinity produced really bad overcorrection at close focus distances on the Olympus M.25mm F1.8, but I'm not sure how generally this is true of similar internally-focusing lenses... and I'm guessing that for external-focus types probably it's a non-issue, as implied in the current tutorial... -- jys ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Lensfun-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/lensfun-users
