Bill Claff’s PDR ratings for the X2D and GFX 100S

This is the 24th in a series of posts on the Hasselblad X2D 100C camera and the XCD lenses. You will be able to find all the posts in this series by looking at the righthand column on this page and finding the Category “X2D”.

In this post, Fuji Rumors looks at Bill Claff’s Photographic Dynamic Range curved for the X2D and the GFX 100S and claims:

…you can see, the Fujifilm GFX100S matches the Hasselblad dynamic range at base ISO, but starting from ISO 400 and beyond there is not competition and the GFX100S beats the X2D in terms of dynamic range.

Bill’s PDR tests don’t take sensitivity into account. My tests show that, at base ISO (64 for X2D, 100 for GFX 100S), the two cameras are within 0.2 stops of having the same sensitivity. Once you correct for that, Bill’s curves for the two cameras are nearly on top of each other.

So the Fuji Rumors claim is at best misleading, and at worst just plain wrong. C’mon folks, these cameras have the same sensors, albeit operated slightly differently. How far apart can the DR be?