Bracketing vs RAW (saving 3-5 exposures -2 to +2 for blending purposes
Dec 4, 2016 16:27:56 #
Has anyone tried saving different exposures from RAW shots for the purpose of blending or HDR? I ask this because using bracketed exposures for blending on a windy day or with moving subjects ain't gonna work. What are the pros and cons of using RAW shots for this purpose?
Thanks
Thanks
Dec 4, 2016 16:41:42 #
Sounds like you area talking about this: https://www.youtube.com/watch?v=bm-gJbn5aEw&t=38s
Most HDR programs have the ability to eliminate some movement in HRD groups (usually called ghosting) but it can be a problem if there is a lot of it.
Most HDR programs have the ability to eliminate some movement in HRD groups (usually called ghosting) but it can be a problem if there is a lot of it.
Dec 4, 2016 16:43:23 #
I do this and find it very useful. That said, when possible, I would always bracket.
Dec 4, 2016 17:00:36 #
Ratta wrote:
Has anyone tried saving different exposures from RAW shots for the purpose of blending or HDR? I ask this because using bracketed exposures for blending on a windy day or with moving subjects ain't gonna work. What are the pros and cons of using RAW shots for this purpose?
Thanks
Thanks
With the newest wide dynamic range cameras, especially those with ISO invariance, the benefit of exposing a single image, bracketing and processing it as HDR are not that clear. I've barely done any HDR since I purchased my D800s, and the newer cameras have as much as a stop more exposure range and less noise. All I do is set my exposure to avoid blowing out important highlights, and deal with the noise in the shadows with local, more aggressive contrast and noise removal.
Dec 4, 2016 17:20:07 #
If you use techniques like ETTR and EBTR, you'll find you'll capture the range necessary without having to use multiple exposures, or HDR.
--Bob
--Bob
Ratta wrote:
Has anyone tried saving different exposures from RAW shots for the purpose of blending or HDR? I ask this because using bracketed exposures for blending on a windy day or with moving subjects ain't gonna work. What are the pros and cons of using RAW shots for this purpose?
Thanks
Thanks
Dec 4, 2016 17:30:14 #
Ratta wrote:
Has anyone tried saving different exposures from RAW shots for the purpose of blending or HDR? I ask this because using bracketed exposures for blending on a windy day or with moving subjects ain't gonna work. What are the pros and cons of using RAW shots for this purpose?
Thanks
Thanks
It's pseudo HDR, and you will save yourself a lot of trouble just doing one frame HDR from the raw. Making multiple frames offers no advantage whatsoever. Blown highlights will remain blown in either case, and shadows will be noisy compared to bracketed HDR.
Photomatix offers manual selective deghosting that can usually solve most ghosting problems with some work--at least far better than any other deghosting in any other HDR program.
Dec 4, 2016 17:35:47 #
rmalarz wrote:
If you use techniques like ETTR and EBTR, you'll find you'll capture the range necessary without having to use multiple exposures, or HDR.
--Bob
--Bob
Not necessarily.
There are subjects occasionally that are extremely contrasty, e.g. bright sunlight on much of the scene with something important in a deep shadow. Even if it is possible to match the dynamic range of the subject to the scene, it requires really careful setup of the exposure. For something like that a bracketing approach is generally useful. You can select the shot that is most nearly the ideal exposure and you can do it with a single press of the shutter on many cameras. My Nikons can run at the maximum frame rate when set to bracket a shot, and when the bracket is done the camera stops taking pictures. With a frame rate of 5-10 frames per second the whole bracket is done in a fraction of a second.
Dec 4, 2016 17:38:12 #
kymarto wrote:
It's pseudo HDR, and you will save yourself a lot of trouble just doing one frame HDR from the raw. Making multiple frames offers no advantage whatsoever. Blown highlights will remain blown in either case, and shadows will be noisy compared to bracketed HDR...
If you do a real bracket, you are changing the exposure for different shots and you can avoid blown highlights in some of the shots.
Dec 5, 2016 00:16:39 #
DirtFarmer wrote:
If you do a real bracket, you are changing the exposure for different shots and you can avoid blown highlights in some of the shots.
And noise in lifted shadows and increased tonal gradation in the extremes. That's the point of bracketing, indeed.
I have a Nikon D800e, and with that I've found that many of my shots that previously would have needed HDR bracketing can be done with decent exposure and post processing, which is a blessing. But there are still plenty of images that need exposure bracketing--sometimes in extreme conditions up to +-6 EV. As soon as the dynamic range of the scene exceeds that of the camera, bracketing and tonemapping is the only way to get a good result.
Dec 5, 2016 02:47:30 #
Ratta wrote:
It does work, it just takes more time post processing!Has anyone tried saving different exposures from RAW shots for the purpose of blending or HDR? I ask this because using bracketed exposures for blending on a windy day or with moving subjects ain't gonna work. What are the pros and cons of using RAW shots for this purpose?
Thanks
Thanks
Dec 5, 2016 02:51:03 #
TheDman
Loc: USA
Ratta wrote:
I ask this because using bracketed exposures for blending on a windy day or with moving subjects ain't gonna work.
Sure it will, use whatever shutter speed you want on the moving stuff, then use a different shot for the rest.
Dec 5, 2016 04:00:30 #
TheDman wrote:
Sure it will, use whatever shutter speed you want on the moving stuff, then use a different shot for the rest.
Not so easy. Blending the areas of the different frames is very difficult to do seamlessly, both for position and tonal qualities. Photomatix selective deghosting makes this much easier, although there can still be problems with position at the borders of the selection(s),
Dec 5, 2016 06:54:15 #
As you stated, "...it requires really careful setup...". That's correct. It requires careful metering of the scene. With that done, one carefully done exposure is all that is necessary.
--Bob
--Bob
DirtFarmer wrote:
Not necessarily. br br There are subjects occasio... (show quote)
Dec 5, 2016 07:18:47 #
TheDman
Loc: USA
kymarto wrote:
Not so easy. Blending the areas of the different frames is very difficult to do seamlessly, both for position and tonal qualities. Photomatix selective deghosting makes this much easier, although there can still be problems with position at the borders of the selection(s),
If Photomatix can do it, then I certainly can in Photoshop.
Dec 5, 2016 07:40:54 #
rmalarz wrote:
As you stated, "...it requires really careful setup...". That's correct. It requires careful metering of the scene. With that done, one carefully done exposure is all that is necessary.
--Bob
--Bob
If you bracket anyway wouldn't one of the shots be pretty close to what you would choose for ETTR?
That would give you the choice between combining the bracketed shots or using the best exposure and just using one.
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