Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio results

Contrast ratio 15:1
Monitor model
Submitted 15 Apr 2021 20:24 CEST, by 5.95.*.*
Camera model Panasonic DMC-FZ20
Processing remarks

Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.6 s (Set EV to +9.2)
Warning: image file 2: camera was zoomed in too much.
Warning: image file 3: camera was zoomed in too much.
image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: Image focal lengths/zoom levels are not the same.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 2.56 cd/m2
Luminance spread 1.5 cd/m2 (2 standard deviations)
Exposure value –11.68 stops   (aim for –2 to –3)
Exposure spread 0.87 stops
Area used for calculation 0.823 x 0.823
Camera settings Exposure time: 1/1000   ISO: 80   F-number: 2.8
Focal length: 57 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 38 cd/m2
Luminance spread 16 cd/m2 (2 standard deviations)
Exposure value –2.13 stops   (aim for –2 to –3)
Exposure spread 0.63 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/20   ISO: 80   F-number: 2.8
Focal length: 96 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 18 cd/m2
Luminance spread 36 cd/m2 (2 standard deviations)
Exposure value –1.92 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/8   ISO: 80   F-number: 2.8
Focal length: 96 mm   (35 mm equivalent)
Exposure compensation: 0
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The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.