Så många människor med så mycket kunskap, borde väl kunna detta:
Dynamic Range?
Ok håll i er nu,
Källa:
www.cambridgeincolour.com
THE HUMAN EYE:
The human eye can actually perceive a greater dynamic range than is ordinarily possible with a camera. If we were to consider situations where our pupil opens and closes for varying light, our eyes can see over a range of nearly 24 f-stops.
Alltså: 24 f-steg OK!
But/Men:
On the other hand, for accurate comparisons with a single photo (at constant aperture, shutter and ISO), we can only consider the instantaneous dynamic range (where our pupil opening is unchanged). This would be similar to looking at one region within a scene, letting our eyes adjust, and not looking anywhere else. For this scenario there is much disagreement, because our eye's sensitivity and dynamic range actually change depending on brightness and contrast. Most estimate anywhere from 10-14 f-stops.
The problem with these numbers is that our eyes are extremely adaptable. For situations of extreme low-light star viewing (where our eyes have adjusted to use rod cells for night vision), our eyes approach even higher instantaneous dynamic ranges
Och till sist:
Most digital cameras use a 10 to 14-bit A/D converter, and so their theoretical maximum dynamic range is 10-14 stops. However, this high bit depth only helps minimize image posterization since total dynamic range is usually limited by noise levels. Similar to how a high bit depth image does not necessarily mean that image contains more colors, if a digital camera has a high precision A/D converter it does not necessarily mean it can record a greater dynamic range. In practice, the dynamic range of a digital camera does not even approach the A/D converter's theoretical maximum; 5-9 stops is generally all one can expect from the camera.
Alltså 5-9steg att jobba med? det är 7 till 3steg mer än vad kameran klarar själv, och 19 till 15 steg färre än vad vi ser.
jag litar mer på dessa & min första fotografchef/Mentor(som tyvärr är död) än den kunskap som verkar finnas här.(förlåt)
Tillägg:
Note the huge discrepancy between reproducible dynamic range in prints, and that measurable by scanners and digital cameras. For a comparison with real-world dynamic range in a scene, these vary from approximately 3 f-stops for a cloudy day with nearly even reflectivity, to 12+ f-stops for a sunny day with highly uneven reflectivity.
Alltså: 12 f-steg! skillnad i direkt solsken,
Någon som vill ifrågasätta detta ring Cambridge
Ha de gött
Kram
M
P.S. Det här visste jag redan "INNAN" jag läste det på denna sidan, men jag hade inga exakta siffror eller tal att jobba med bara att det var en del steg att jobba ifatt, bara det att ögat ligger litet före kamerans sätt att se & försöka fånga våran underbara värld då var årtalet 1980 typ och med "MIN" första kamera KODAK DISC 6000(det ni) i handen?. D.S.
