Gary
All-Pro
- Location
- Southern California
- Name
- Gary Ayala
Here is my take ... I think there is enough differences between cameras/sensors and metering to merit the fluctuations in exposure values. (Granted a full stop is a rather large and significant fluctuation.)
I just saw an exposure/metering test for the XP1, using multi, spot and average metering shooting at a uniformly color, evenly lighted piece of white paper and all three images came out differently, the multi came out lighter, the average darker and the spot was slightly lighter than the average.
Everybody's multi/matrix/evaluative/et al metering will be different or potentially be different because that is where all the secret sauce is added. So you have to compare apples to apples here and not venture out of aver or spot metering. Even then, the Fuji will always be an avocado because of the huge difference in sensors design. Fuji's XTrans sensor has significantly more green pixels than blue or red while a Bayer sensor has an equal number of green, blue and red. Maybe Fuji is making adjustments for all this in when calculating ISO. I don't know. I don't know if an XTrans sensitivity to light is different than a Bayer ... and I don't know if a bias to green should even have a play in determining ISO. ISO could just be ISO regardless of type of sensor. (Does one calculate Sensor to ISO or ISO to Sensor ....?)
I must be older than I think, because ... while I find this interesting, (similar to knowing the capitol of Chad or reading a news story on North Korea), but I sorta don't care as long as my camera (regardless of manufacturer) can deliver a stunning image at ISO 1600 or 3200 ... I'm as happy as a clam in wet sand.
Gary
I just saw an exposure/metering test for the XP1, using multi, spot and average metering shooting at a uniformly color, evenly lighted piece of white paper and all three images came out differently, the multi came out lighter, the average darker and the spot was slightly lighter than the average.
Everybody's multi/matrix/evaluative/et al metering will be different or potentially be different because that is where all the secret sauce is added. So you have to compare apples to apples here and not venture out of aver or spot metering. Even then, the Fuji will always be an avocado because of the huge difference in sensors design. Fuji's XTrans sensor has significantly more green pixels than blue or red while a Bayer sensor has an equal number of green, blue and red. Maybe Fuji is making adjustments for all this in when calculating ISO. I don't know. I don't know if an XTrans sensitivity to light is different than a Bayer ... and I don't know if a bias to green should even have a play in determining ISO. ISO could just be ISO regardless of type of sensor. (Does one calculate Sensor to ISO or ISO to Sensor ....?)
I must be older than I think, because ... while I find this interesting, (similar to knowing the capitol of Chad or reading a news story on North Korea), but I sorta don't care as long as my camera (regardless of manufacturer) can deliver a stunning image at ISO 1600 or 3200 ... I'm as happy as a clam in wet sand.
Gary