I was reading that Sony A7RIII has 15ev of dynamic range. So I measured the dynamic range of my K1 and found out my K1 has 16ev of dynamic range. Amazing (maybe I'm luck owner of this K1 copy).
How to measure it?
1) used a ND32 filter to accommodate the full range lens+camera settings.
2) ISO100, shutter speed 2 sec. f19, exposed for the highlights with spot metering and set the exposure compensation to have high lights at the limit if being blown out, that's the high lights reference point.
3) Set ISO to the max 204000 (that's +11 stops from ISO100)
4) Increase shutter speed from 2sec to 1/8000 sec. that's -14 stops in order to compensation for ISO increase
5) Stop down the lens from f19 to f38, that's -2 stops less light.
That equivalent to:
- worsen the exposure amount on sensor by 11 stop (increase for ISO from 100 to 204000)
- worsen the exposure amount on sensor by 3 stop with increased shutter speed by 3 stops more than 11 ev (14 stops between 2sec and 1/8000)
- worsen the exposure amount on sensor by 2 stops with the lens aperture
Result:
At ISO 204000 I can distinguish between black and something that's was the highlight level there is something there.
Total drop of exposure from the max level = 16ev, can still see the difference between black and not black. K1 beat them all with 16ev. Wow. Try it you will see.
Last edited by biz-engineer; 11-01-2017 at 02:22 AM.