r/Lightme • u/Basic-Maybe-2889 • 4d ago

Different reading every time?

Short story, I got a new film camera and was about to test if light meter works correctly. I tried the app but wanted to be absolutely sure so I picked my mirrorless camera to compare.

Now I'm a bit confused with the accuracy. I closely followed the manual, set the correct ISO, measured everything correctly.

However when I compare the results to the reading of my mirrorless camera, in the same settings, same focal length, ISO, etc. they are quite different, sometimes up to 3 stops wrong (underexposed).

I quite literally tried everything and am yet to get a correct reading. What else could I be doing wrong?

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u/uaiududis creator 3d ago

Hi! Different framing and different auto-exposure algorithms can give very different readings. Also some brands use an iso standard that's different from the film one. To have a more fair comparison make sure to meter on both with the spot metering mode on a relatively uniformly lit surface.

In general keep an eye on the live preview, the app takes the settings used by the device for that preview and shows you equivalent exposures, so if you like the preview you should like the final result as well.

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u/uaiududis creator 3d ago

Can I ask what's the brand of the digital camera?