Sadly, after the photowalk, the Fujifilm people said that would like to have their camera and lens back. That left me with the gear I had brought for the day, a X-H1 and 100-400 lens. The X-H1 was a marketing oddity. Fujifilm introduced it as a flagship model with improved build quality and it was the first in the range to have IBIS (in body image stabilisation). The price at launch reflected its premium status. Yet within six months, Fujifilm brought out X-T3 which featured better autofocus but omitted IBIS. As many of the lenses had optical image stabilisation, lack of IBIS was not a concern for many. In the same year of its introduction, Fujifilm was heavily discounting the X-H1. It was a bargain and that is not just my opinion. Many others bought it for the same reasons as I did.
I have written here previously that I opted for the X-H1 over the X-T3 as I preferred the form factor and felt that the older AF performed well enough for my purposes. If I were to do a lot of action photography, I might have decided differently. It did mean, though, that I have never properly tested the X-H1’s capabilities in that regard and this was an opportunity to try it out. This time, after lunch I went onto the roof terrace with Frank and we both shot from there. Compared to the X-H2S, it took slightly longer to pick up the subject but then stayed locked on.
In most of my shots, I picked up individual cars as they drove along the back straight and took a shot as they went around the bend. Many of the shots were sharp, such as the example below. The success rate was on a par with the X-H2S although as the shooting conditions were different, I would hesitate to make a direct comparison.

- Silverlake 466 at Brands Hatch
- Silverlake.jpg (143.58 KiB) Viewed 189309 times
After I posted the earlier shot taken with the X-H2S, I recalled a tip I had been given some time ago that showing the cars at an angle. This is the shot as taken. I think that it does make a difference. Having the diagonal introduces some dynamic tension which makes for a more dramatic result.

- Silverlake 466 as taken
- Silverlake level.jpg (135.62 KiB) Viewed 189309 times
Bottom line. The X-H1 performed better at tracking subjects than I had expected. Despite the technology in the X-H2S being two generations on, for my purposes I would gain little from an upgrade. The X-H1 has always been a good camera and the availability a newer model does not change that. Fujifilm has said that later this year there will be a X-H2 with a 40 MP sensor but, for me, having more megapixels is unlikely to make much of a difference. 24 MP is just fine for most purposes.