Could you please Explain your Dual ISO and Cine Ei? From the picture below I see 5 Cine EI settings. Do these include both Dual ISO 400 and 1600 and everything between? Or is this a true exposure index and you set your Base ISO seperatly like on FX3/FX6 and then judge/rate your image with Cine EI (how many stops below or above middle gray)?
On the FX3/F6: When your set EI higher, your image in the monitor gets brighter and then you close aperture to compensate for normal exposure: under the hood the Base ISO stays the same, but by closing your aperture you protect your highlights with the risk of getting noisy shadows. Every sensor will have its limits and sweetspot.
Or is it analog/digital gain staging with a fixed DR? Or does the sensor have an ADC with two different analogue gains/circuits like the FX3/FX6?
This is not the final UI interface—just a simplified parameter menu for early users to use conveniently.
Spark will feature two native ISOs: 400 and 1600. Both native ISOs share the same dynamic range. In the final UI, the usage logic will be consistent with cameras like the FX3/FX6. You’ll be able to set different ISOs and then adjust EI to assist in evaluating and judging the image.
The EI gain factor will not be applied to the raw data; it’s merely a monitoring tool to help you assess exposure.
