5 ms·
One more feature I would like to see, I've never heard of a camera supporting it but there has been aftermarket support on some Canons: Automatic shooting of H
by LorenPechtel 5y ago
One more feature I would like to see, I've never heard of a camera supporting it but there has been aftermarket support on some Canons:
Automatic shooting of HDR exposures. Stacking them requires some human intervention and shouldn't be done on the camera, I'm simply thinking of the shooting. You put your camera on a tripod, select HDR and push the button. It shoots a frame and checks the histogram--are pixels falling off either end? If so, adjust only the shutter speed and shoot again. Keep doing so until the slowest shot has nothing falling off the dark end and the fastest shot has nothing falling off the bright end.
- namibj 5y agoMy Canon IXUS 100 IS did that with CHDK firmware loaded on. I guess that may be the aftermarket support you're referring to?
- rodgerd 5y agoThis is built-in to Olympus cameras and has been for years.
- mgdlbp 5y agoI've seen several Fujifilm bridge cameras with in-camera stacking; not sure about the rest of their line.
- sainotbot 5y agoPretty sure you can choose DR100, DR200 or DR400 since the X-T1. My X-T4 definitely has it.
- spaetzleesser 5y agoThat’s not really HDR though.
- IshKebab 5y agoWhy does stacking them require human intervention? For a completely static scene I would have thought the algorithm is fairly simple and unambiguous.
- LorenPechtel 5y agoThe initial stack doesn't require a human. Compressing the dynamic range to produce a useful output is still a task that AFIAK is best performed by a human.
- notJim 5y agoI'm not sure if this is what your parent meant, but I think it can require more or fewer frames, with more or less spacing depending on the camera, and on the dynamic range of the scene. Currently (at least with Fujifilm) you have to manually program all this in.
- LorenPechtel 5y agoExactly--all it requires is a quick inspection of the histogram to tell if you need another shot, but that's problematic for a human unless you can do it all remotely as you don't want to touch the camera if possible. It would be a trivial task for the camera itself.
- nitrogen 5y agoTone mapping is very much a subjective process. There's no one "HDR" algorithm. At best the camera could convert everything to linear or logarithmic light and save in OpenEXR or something like that.
- IshKebab 5y agoTone mapping isn't HDR though. It's mapping HDR to standard dynamic range. > At best the camera could convert everything to linear or logarithmic light and save in OpenEXR or something like that. Yes exactly. That's what HDR is.
- sudosysgen 5y agoWhat you want is bracketing. Most cameras do it, my A7ii does for example. Cameras have enough dynamic range nowadays that you'll get close enough. Alternatively Sony has "DRO Bracketing" which basically does what you mean with the histogram, but a bit better.
- LorenPechtel 5y agoA lot of cameras have bracketing--even the bridge camera I carry while hiking has it. I'm talking about HDR-aware bracketing that decides how many shots to shoot rather than simply shooting a fixed range. Imagine a shot in a building looking out the window with sky visible. You could have a range of 10 stops or more.
- sudosysgen 5y agoA modern full-frame camera will have 14 stops of dynamic range. Five shots 3 EVs apart is enough, you'll get a total of 29EVs of dynamic range. Well beyond your ability to actually tonemap properly. That's equivalent of, practically speaking, going from a shutter speed of 10 seconds to 1/3200ths of a second, and still having fourteen stops of headroom left (7 at both ends). FWIW I can take pictures in a room with a window looking at the sky and change the exposure to clearly see both the sky and the room without even bracketing on a full frame camera.
- LorenPechtel 5y agoYeah, if you have a camera that pricey you could do it that way. Note, though, that you don't want to use all your dynamic range as the quality drops off.