Fuji is recommending cropping as a method to ameliorate the limitations of a fixed lens in the GFX 100RF. That will affect dynamic range. Using some assumptions and approximations, I’ve calculated that, using Bill Claff’s Photographic Dynamic Range measurements from the GFX 100S.
Here it is:
The vertical axis is PDR in stops. The horizontal axis is ISO setting. The equivalent focal length for a 33x44mm sensor is shown for each line.
Easy to understand graphics. Showing what we knew/expected . Nice to have it documented. Thank you.
Thanks! This exercise was useful to me, making me think more explicitly about the relationship between effective dynamic range and how much of the sensor is in use.
But I’m finding this chart a little bit confusing because I’m having trouble tying it back to what I assumed is the source chart – is it this the one?
https://www.photonstophotos.net/Charts/PDR.htm
For one thing, I’m having trouble finding the GFX100S II in the list of available cameras in that chart (at least in the data as of “2025-04-09 15:00 GMT-5”). I feel like I’m going blind.
I do see data available for the GFX 100S and the GFX 100 II, but not yet for the 100S II!
And also, I was surprised by the ISOs in your chart for that dual-ISO DR local minimum and rise again… I could swear that at least with the other GFX 100 sensors, the dip is at 400(ish), rising again at 500(ish); in your chart, the local minimum appears to be at ~500, rising again at ~640. I can’t know for sure, not having found GFX 100S II data to look at, but it seems unlikely to me that would have changed.
So… color me confused.
Both errors have been corrected in the post. Thanks for the corrections.
Oh, great! I didn’t know if I was just missing something.