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Author Topic: Light Meter Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 05-05-2015 03:22 PM                     There are quite a few apps for ambient light measurement. The harkness needs to measure luminance. It may work because unlike other smartphones, the iOS devices only use a very limited range of different camera modules, so they may be spec'd tighter and thus be more accurate. Whatever 'accurate' means in this case. - Carsten  |  IP: Logged Gary Lightfoot Film Handler Posts: 20 From: Caterham, Surrey, UK Registered: Apr 2015 posted 05-05-2015 03:33 PM                     Yeah - that makes sense. We've probably no idea if any of the free apps have been checked against a calibrated meter to ensure accuracy to an acceptable level.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-05-2015 04:33 PM                     The claim is that the app is accurate to within +/- 1fL  |  IP: Logged Armand Diaz Film Handler Posts: 1 From: Madrid, Madrid, Spain Registered: May 2015 posted 06-16-2015 07:21 AM                     quote: Jay Glaus I was looking for something to measure screen brightness for D cinema. At the drive in I have a pretty long throw to the screen, I was looking for one of the guns you can look through and see the Ft/L on any given spot of the screen You may try this free Android app: LxMeter It can take luminance measurements on very narrow areas and includes other helpful features as calculating the CCT  |  IP: Logged Muhamad Taufiq Film Handler Posts: 23 From: Bandung, Indonesia Registered: May 2015 posted 06-17-2015 04:45 PM                    From my experience with free smartphone light meter, is that you really cannot trust the CCT reading. I don't know about accuracy of the meter itself, since I don't have an actual meter to compare against.  |  IP: Logged

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