Pleasantly surprised I just installed and tested this. I set the fstop and iso to something that I would use inside my home. The shutter speed was too fast so I knew that the calibration had to be off for my Galaxy S3. I grabbed my Sekonic, and figured out how to get ev out of it and convert it to lux to set the correction in my phone. After that it is a little off from my sekonic under random light sitations in the house, but it is close enough that the exposure would be usable. I calibrated at 3.5ev. Initally when testing with my 1000 lumen led flashlight I was getting about .5ev difference between the two, but then I found setting the phone sensor so it was the same height as my approximately one inch thick meter corrected that also. My phone maxes out at 15ev with my flashlight resting on it. The sekonic read 18.6ev under the same condition, so I gueess that value is the max for my phone.
Brilliant! Have not used an incident meter for years. This works, and can be so much more useful than the camera's reflective meter. Thanks! If you're not getting an accurate reading, make sure device is pointed right way. Meter on screen side of my phone.
Not so thrilled I wanted to measure studio light... It doesn't include a flash mode, please upgrade where you can Start measuring, hit the flash and stop automatically at the highest LUX point to get the appropriate F measures and speed ones... Otherwise very accurate!
Accurate Incident Light meter! Thank you FM-Bee for this reliable-accurate incident light meter app! I downloaded this FM-Bee free version on my Samsung S5. I took the light reading at the same spot, same angle (laying flat on the table) and from a same constant light source output of a 24w-cf with FM-Bee on Samsung S5, Sekonic -L398 (analog) and Sekonic L-308S (digital) The reading between the app on Samsung S5 and Sekonic L-398 were the same, and with the L-308S was 1/3 -1/2 less light. The reason was FM-Bee on Samsung S5 round up and the Sekonic L-308S show the reading in the 1/3 increment. For the Sekonic L-398 I paid around $125 (26 years ago), and L308S for $260 (11 years ago). I wrote those prices for some of you to appreciate this free app which is very useful and accurate.. Please when you use this FM-Bee app, remember this: This app is designed to take the reading as the INCIDENT LIGHT METER which light falls (comes) on the "object", not reflecting from the object. Thanks again FM-Bee Corp. for this free incident Light meter app. HoaiViet
Useful starting point Ok, so the app may not be as accurate as a purpose built dedicated light meter, but I find it's accurate enough to provide a solid starting point with only minor tinkering needed if any in continuous lighting conditions. No strobe function? To those who are complaining about a lack of basic f stops... (f1.8 for example!) change the apps settings to 1/3 incrimants Brilliant for the price (free!)
Looks like this app uses the front light detector which is used to adjust the screen brightness, not the camera. Other than wishing this feature to be documented more clearly, grart app. May be not extremely precise, but it always depends on metering mode.
1.App can be moved to sd card.
2.Fix bug on parameter drawing.
3.Update AdMob SDK
4.Add permission(ACCESS_NETWORK_STATE) for new AdMob SDK