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Can White Balancing be turned OFF with the a900/a8

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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Topic: Can White Balancing be turned OFF with the a900/a8
    Posted: 21 December 2021 at 21:42
Originally posted by addy landzaat addy landzaat wrote:

Originally posted by Jonas A-R Jonas A-R wrote:

You’re welcome. I think you would have gotten the answer quicker if you had explained why you wanted to turn off wb.
Yep and we did ask.


Several times .
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 21 December 2021 at 21:22
Originally posted by Jonas A-R Jonas A-R wrote:

You’re welcome. I think you would have gotten the answer quicker if you had explained why you wanted to turn off wb.
Yep and we did ask.
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Post Options Post Options   Quote Jonas A-R Quote  Post ReplyReply Direct Link To This Post Posted: 21 December 2021 at 20:54
You’re welcome. I think you would have gotten the answer quicker if you had explained why you wanted to turn off wb.
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Post Options Post Options   Quote XKAES Quote  Post ReplyReply Direct Link To This Post Posted: 21 December 2021 at 19:52
UniWB answers my question. Thanks for mentioning it.
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Post Options Post Options   Quote Jonas A-R Quote  Post ReplyReply Direct Link To This Post Posted: 21 December 2021 at 19:18
Originally posted by alpha_in_exile alpha_in_exile wrote:

It could be that the OP had no reason other than curiosity for asking. It seems an odd question from a vacuum, but maybe more reasonable coming from a film photographer, where the white balance is fixed by the medium itself and not a point of discussion until printing... (or, rarely, developing, if you're using alternative film developing methods).

However, at the risk of helping other people who might have a similar question and either don't know why they're asking it or can't put their reason into words, here is one reason one might want to turn off WB altogether, or develop a workaround for WB issues: the JPEG previews are unsatisfying, because they do not well represent whatever's captured in the RAW file. I'm assuming here that the questioner is shooting RAW, because, well, RAW is 100% the first way to deal with WB issues.

Can the WB be turned off? No. But.

One option would be to (try to) ignore the JPEG preview or turn off the display and just pray things come out ok -- i.e. operate it like a film camera. Voila. Problem solved, unless you don't trust the camera or the settings you chose and therefore want to see a visual representation of the exposure captured (wherefore digital photography). When you're shooting the stars at a dark sky site, you want to do this - you don't want your display lighting up after every interval shot, annoying your neighbors and ruining your night vision while you gaze at the stars. Seriously.

Another option is to (try to) ignore the JPEG preview and only look at the histogram (assuming you've gotten used to histogram data and the peculiarities/behavior of the body you are working with, and can visualize how you might adjust the final image in postprocessing - kind of a leap, no?).

Another option is to use the Intelligent Preview function (since we're talking about A900/A850 here), to preview the results of different WB settings.

Another option is to set a custom WB or a preset WB -- e.g. neutral/daylight/5000k -- OR just set the camera to B&W (as has been suggested) -- and again ignore the JPEG output and focus mainly on light/shadow exposure.

Another option is to carry a neutral grey card or a color calibration card, and use that tool to set a custom WB when in challenging lighting.


All good points. Or one could use uniwb
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Post Options Post Options   Quote alpha_in_exile Quote  Post ReplyReply Direct Link To This Post Posted: 21 December 2021 at 19:02
It could be that the OP had no reason other than curiosity for asking. It seems an odd question from a vacuum, but maybe more reasonable coming from a film photographer, where the white balance is fixed by the medium itself and not a point of discussion until printing... (or, rarely, developing, if you're using alternative film developing methods).

However, at the risk of helping other people who might have a similar question and either don't know why they're asking it or can't put their reason into words, here is one reason one might want to turn off WB altogether, or develop a workaround for WB issues: the JPEG previews are unsatisfying, because they do not well represent whatever's captured in the RAW file. I'm assuming here that the questioner is shooting RAW, because, well, RAW is 100% the first way to deal with WB issues.

Can the WB be turned off? No. But.

One option would be to (try to) ignore the JPEG preview or turn off the display and just pray things come out ok -- i.e. operate it like a film camera. Voila. Problem solved, unless you don't trust the camera or the settings you chose and therefore want to see a visual representation of the exposure captured (wherefore digital photography). When you're shooting the stars at a dark sky site, you want to do this - you don't want your display lighting up after every interval shot, annoying your neighbors and ruining your night vision while you gaze at the stars. Seriously.

Another option is to (try to) ignore the JPEG preview and only look at the histogram (assuming you've gotten used to histogram data and the peculiarities/behavior of the body you are working with, and can visualize how you might adjust the final image in postprocessing - kind of a leap, no?).

Another option is to use the Intelligent Preview function (since we're talking about A900/A850 here), to preview the results of different WB settings.

Another option is to set a custom WB or a preset WB -- e.g. neutral/daylight/5000k -- OR just set the camera to B&W (as has been suggested) -- and again ignore the JPEG output and focus mainly on light/shadow exposure.

Another option is to carry a neutral grey card or a color calibration card, and use that tool to set a custom WB when in challenging lighting.
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 20 December 2021 at 08:09
Originally posted by XKAES XKAES wrote:

And my question about WB has nothing to do with this.
And why did you ask about WB? Maybe we can help you.
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Post Options Post Options   Quote Jonas A-R Quote  Post ReplyReply Direct Link To This Post Posted: 20 December 2021 at 05:54
You can export the raw planes as TIFF from rawdigger.
This is a composit RGB autoscaled to 16bit with a 2.2 gamma curve applied:


Why would you like to have wb off?


Edited by Jonas A-R - 20 December 2021 at 06:50
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Post Options Post Options   Quote XKAES Quote  Post ReplyReply Direct Link To This Post Posted: 19 December 2021 at 23:21
The picture I showed above is with an unmodified a850 with a 720 IR on a 35mm lens. It's a relatively long exposure -- not to me -- but it looks like some IR light was recorded.

This was just a first test. I think a slightly shorter exposure and more contrast will create a more IR-like shot.

It was shot at ISO 100 with noise reduction ON -- so I can easily get shorter exposures if I want.

I have to assume that the a900 & a850 have the same IR sensitivity.

And my question about WB has nothing to do with this.
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 19 December 2021 at 20:59
Originally posted by XKAES XKAES wrote:

So the answer appears to be "No". That's what I thought. I just wanted some confirmation.



Presumably this question is being asked on the back of this thread , using an a850 for infrared ?

If it's so you can review the images on the LCD and can't tell what's going on with a red image , the answers easy .

1 ; set the camera to shoot B&W JPEG's .
2 ; Now set to record images in RAW .

the preview images will be in black and white so you can gauge the images , but the RAW file will keep all the information to process the final image .

White Balance is irrelevant as your shooting RAW .

I'd be interested to know if the a850 can capture IR , as the a900 doesn't .
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 19 December 2021 at 20:21
Leica has true Monochrom cameras - maybe Joe wants one of those
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 19 December 2021 at 20:08
Originally posted by LAbernethy LAbernethy wrote:

as a contrarian I will say "yes". Menu/camera pictogram, column 1 option 6 creative style: option 6 B/W enter


To some extent this is true as the output is a monochrome jpg, but not entirely, the white balance setting (or AWB) will still determine how light/dark blues and yellows show in the final B&W image.
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Post Options Post Options   Quote LAbernethy Quote  Post ReplyReply Direct Link To This Post Posted: 19 December 2021 at 19:53
as a contrarian I will say "yes". Menu/camera pictogram, column 1 option 6 creative style: option 6 B/W enter
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 19 December 2021 at 19:40
Originally posted by XKAES XKAES wrote:


Seems like a simple Yes or No question to me.

Can White Balancing be turned OFF with the a900/a850?


Do you mean ; Can AUTO White Balancing be turned OFF with the a900/a850?

If so , then yes . You can turn off Auto WB and either go to pre-sets or set a manual figure .

As far as I know there is no camera that can have any form of WB control switched off .
Shooting in RAW it's effectively off , to view the image you still have to select a WB , either you decide or you leave it to automatic .
But everything has to have a light colour , otherwise you haven't got an image to see .

It seems we are not quite understanding your question ?

What would be your desired goal of switching all WB control off ?

Edited by neilt3 - 19 December 2021 at 19:46
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