I am a bit confused about something that probably has a simple answer. I am confused about rating cameras with the 18% grey card test. RED, the Alexa and many other digital cinema cameras have a range of IE settings but I keep reading about DPs "rating a camera" at a particular EI (RED 320, Alexa 800, and so forth) is this simply the EI that is the optimal EI setting for that particular camera or am I missing something else here? This has been bugging me for a while as I learn more and more.
Love to hear the answer and thank you for sharing your knowledge with a guy just getting started.
Jayson L. Wilkins
EI RATING for digital cameras
2 replies to this topic
Posted 15 May 2012 - 06:04 PM
You've got it right. It's the EI which renders either or both the most dynamic range or the least amount of noise. The sensors in a camera, like a film stock, have a certain response to light quanity when it hits the system; so they work that out to an "optimal" ISO/EI/ASA pick the acronym you'd like (though not DIN, because of the war). And when you change it in camera or in post, you are either adding or removing gain.
Posted 15 May 2012 - 07:05 PM
Thank you for the response. I am very pleased. That question has been gnawing at my brain for a while.