Fujifilm's Dynamic Range vs Dynamic Range Priority

[@simon359]

Excellent video, but does this affect the raw image at all?

[@PeltierPhoto]

I didn't want to get into that can of worms here because it is a rather large and technical topic, but the short answer is that yes it does. Because the initial capture is underexposed when using DR or DRP (by forcing a faster shutter speed or smaller aperture with the required increase in ISO), highlight areas in the initial capture won't be as bright, meaning they might be preserved. Whether or not that's reflected in your RAW converter is a different matter. I can only speak to Capture One since that's all I've tested this with. Creating two photos of the same scene, one with DR100 at ISO125, and the next with DR400 and an ISO of 500 (and a shutter speed two stops faster), the RAW file created at ISO500 showed more highlight detail when using a linear response curve. The shadows showed more noise because of the curve required to pull those back up, but that's the tradeoff.

[@simon359]

@@PeltierPhoto Yes, definitely a lot to take in, but I’m more interested in saving the highlights for sure!🖖

[@dlc1119]

Good to know. I will play with the weak priority setting next time out.

[@novaro0296]

Glad a fresh video is out on this! Fuji is so confusing sometimes

[@wilfs1196]

Excellent explanation for a topic that is probably misunderstood by non pros

[@PeltierPhoto]

Thanks...that's who I'm here for :)

[@Frank-yb9hf]

thank you for this great explanation! 🙏🏼

[@PeltierPhoto]

Glad it was helpful!

[@ramonarias1234]

I had heard that DRP used the base iso for the highlights and the high iso for the shadows, but what you say is completely different. Right now I'm baffled, I'll look for the information because I didn't make it up, I read it somewhere... lol.. In fact, on my xs20 I always use the iso at 320 and DR200 and DRP auto precisely to take advantage of this.

[@PeltierPhoto]

Right, but in order to use the high ISO for the shadows, your camera needs to be set for that higher ISO so that you can adjust your aperture/shutter speed accordingly.

[@markcasebeer8273]

Nice video. I do have a question. How does using auto ISO affect the camera's DR? In the past, when I shot all SOC jpg, and I used DR 400 the camera would use an ISO value a lot higher than needed. In a photo like your example, it would give me nice sky detail and contrast in the trees but the ISO level was extreme for shooting in bright daylight. Why did the camera pick such a high ISO?

[@PeltierPhoto]

Auto ISO will always bump it up to the minimum required for DR400, but may go higher depending on your aperture and shutter speed (or minimum shutter speed programmed in Auto ISO). Beyond those two variables, I can't think of why it would bump it up to something excessively high. It only needs two stops higher than base to do what it needs to do for DR400. What kind of ISOs were you seeing?

[@markcasebeer8273]

@@PeltierPhoto This was a while back when I was using the X-T3. I was in the Smoky Mountains shooting some vistas. I used DR 400 with the 50-140 at 5.6. The camera chose between 2000 & 5000 ISO using an extremely high shutter speed. They looked great, except for the noise. Why did the camera choose these high ISO ranges? After that, I've always set the DR range to 100. I now shoot mostly Raw. This has always puzzled me.

[@PeltierPhoto]

Ah ok. I've never seen that kind of behavior. I'd recommend giving it another try and seeing if it behaves as it should.

[@Termidryna]

Thanks.

[@PeltierPhoto]

You're welcome