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Forum: Photographic Technique 04-03-2019, 01:20 PM  
AWB, how and when the camera decides?
Posted By CarlJF
Replies: 21
Views: 1,178
I understand the idea of a one button press, but it can't be done because WB isn't a on/off thing. You still have to tell the camera what WB you want to use if AWB isn't wanted. And this why it works like it is right now, pressing the WB button and then select the desired WB. It's similar to setting the ISO: you have to select the value (or auto) after pressing the button. The camera can't guess exactly what value you want to use nor can it guess that you want to shoot a butterfly and then a panorama for the next 20 shots and then back... Either it's set in auto mode (camera guessing) or in manual mode (what you want exactly), but it can't be both at the same time (hoping the camera will guess exactly what you want in and between shots).


Outside of this, the nearest thing to a one button would be to register User modes for panorama and butterflies. Then, you only have to turn the dial one notch between U1 and U2 to switch between the two sets of settings. Which is as fast if not faster than a button. For example, you can register AF.C, AWB, autoexposure and bright on U1 for butterflies and MF, manual exposure , daylight WB and landscape profile on U2 for panorama. Sure, some work has to be done beforehand to register the two modes but when it's done it allows to quickly switch between the two types of shooting.
Forum: Photographic Technique 04-03-2019, 11:06 AM  
AWB, how and when the camera decides?
Posted By CarlJF
Replies: 21
Views: 1,178
But you were talking about getting constant WB for shooting a panorama... For a butterfly, just keep the WB to whatever it is, take the shot and balance the colors in processing if needed. For this kind of situation, WB should be the least of your concerns. Again, WB isn't something needing to be perfectly nailed on when taking the shot. Because it can be changed to whatever result is wanted in processing, in or out of camera, without affecting IQ. It's different than focus that absolutely has be right at the time of shooting, or exposure that only can be corrected up to a point while potentially having a negative effect on IQ. As long as the DNG file is available, it's impossible to screw up a shot because the wrong WB setting was used at the time of shooting. At worst, it only means that it will take some time, probably less than a minute, to adjust to WB in reprocessing a new jpg. Which is hardly an issue if the picture is a keeper.
Forum: Photographic Technique 04-03-2019, 09:38 AM  
AWB, how and when the camera decides?
Posted By CarlJF
Replies: 21
Views: 1,178
If you only need constant WB, the easiest is to use one of the presets. For landscape panomarama, the daylight setting should do just fine most of the time. Yes, you have to go through the menu but it's only a matter of seconds... Most camera bodies even have a WB button which makes this operation a quick and easy operation. The WB button is no more difficult to press than the green button... Just press the WB button, select the daylight preset, press OK. It's not like it's a complex or time consuming operation.

It's even possible to make it quicker by recording all the settings in one of the user mode on the dial. Just turn the dial to the user mode when making panorama and turn it back to whatever it was before when finished... Could not be much simpler or faster than that.

As for forgetting to going back to AWB, it's not different than any other settings. Do you forget to turn back on AF ? Or forget to get out of M mode ? In fact, it's even more minor than mos other settings since it can be corrected afterward with any adverse effect on the picture.

---------- Post added 04-03-19 at 12:51 PM ----------



In fact, for this reason, many people even prefer to stick to "Daylight" WB instead of AWB for anything but artificial lighting. Some photography teachers even recommend this to their students.
Forum: Photographic Technique 04-03-2019, 08:44 AM  
AWB, how and when the camera decides?
Posted By CarlJF
Replies: 21
Views: 1,178
Well, by definition the WB can't be "locked" and auto at the same time, like any other settings. The easisest way to lock the WB is to switch the one of the preset. The daylight preset will work fine most of the time and will give you the exact same WB on all shots.

If you want to use a white card, choose custom WB on the camera and select the white card as the target to use for WB and use this for the following shots. It's really not difficult to do... I've done it many times in unusual lighting situation. This also can be done after the shooting either by software (any decent one will allow to do this) or using in camera processing. This last option will take only a few seconds to generate jpgs SOOC balanced with the custom WB from the selected target...
Forum: Photographic Technique 04-03-2019, 06:59 AM  
AWB, how and when the camera decides?
Posted By CarlJF
Replies: 21
Views: 1,178
It's applied during processing. This is why white balance can easily be corrected from the raw file after the shot. The raw file will be the same no matter which WB setting was used while shooting (outside of the metadata describing which WB was selected to be applied during processing).
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