I’m planning to do a number of comparison tests between the JPEGs from the Fujifilm GFX100S II and my X-series models, like the Fujifilm X-T5. What’s different? What’s the same? I haven’t come to very many conclusions yet. There’s clearly a difference, but it seems so subtle it is tough to put a finger on what exactly is divergent.

For this article, I’m comparing the faux Grain between the GFX100S II and the X-T5. This isn’t a carefully controlled scientific test. When my wife (on the X-T5) and I (on the GFX100S II) captured these images, we did not intend for them to be used in any sort of comparison test. I chose these because they were made in the same location (White Sands National Park in New Mexico). They were captured with the new Kodak Gold Max 400 Expired Recipe, and reprocessed in-camera with the Astia Summer Recipe. I chose those two Recipes because of their Grain: Weak/Small and Strong/Large.

You cannot tell much at all from the above photos. From examining the pictures more closely, I can state that the size of the faux grain is a little larger in the X-T5 JPEGs than the GFX100S II, but you can’t really tell without cropping in. So let’s crop in!

In the first set (identified simply by “Crop”), I’ve made the pictures roughly the same size. If you look carefully, the Weak/Small Grain is slightly more visible in the X-T5 pictures, but it’s not overtly obvious. In the second set (identified by “Bigger Crop”), I’ve tried to match the Grain, and I had to crop much more deeply on the GFX100S II pictures to do so. These are significant crops, and you’d have to print large to view them this big. I think if a Grain size Medium existed on GFX, that would more closely match Grain size Small on the X-series.

Below is a repeat, except for with Strong/Large Grain. I think if a Grain size Medium existed on the X-T5, it would more closely match Grain size Large on the GFX100S II.

I don’t know that it makes any practical real-world difference, but the size of the Grain—whether Small or Large—is not identical on GFX as it is on X-series cameras. It’s not scaled the same. It’s smaller on GFX and larger on X-series, specifically when comparing the 100mp images from the GFX100S II to the 40mp images from the X-T5. There are also likely variances between the 26mp APS-C sensor and the 50mp GFX sensor.

The way to look at this, I suppose, is that film grain appears more fine on medium-format film than 35mm. The difference in silver grain between—say—120 film and Advanced Photo System Type-C film is much, much more significant than the difference in Grain between GFX and X. I think you’d expect the Grain to be more “fine” on GFX—and that’s what you find—but it isn’t nearly as much of a difference as with actual film.

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Fujifilm X-T5 in black:
Amazon, B&H, Moment, Wex, Nuzira
Fujifilm X-T5 in silver:
Amazon, B&H, Moment, Wex, Nuzira
Fujifilm GFX100S II:
Amazon, B&H, Wex