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Forum: Photographic Technique 04-03-2019, 02:41 PM  
AWB, how and when the camera decides?
Posted By photoptimist
Replies: 21
Views: 1,178
A couple of solutions:

1. Editing the "Memory" settings can prevent some of the lost shots. Setting the camera to forget WB mode when you turn the camera off defaults to AWB. Setting the camera to forget Drive mode when you turn the camera off defaults to single shot. Obviously that has some downside if you like setting the camera to some obscure setting for a prolonged period of time.

2. Creating a User mode setting for panoramas, another for butterflies, and etc. is also another way to quickly reconfigure a bunch of settings without menu diving.
Forum: Photographic Technique 04-03-2019, 09:28 AM  
AWB, how and when the camera decides?
Posted By photoptimist
Replies: 21
Views: 1,178
If you shoot RAW or RAW+, you don't need worry about WB at all. It's only if you want decent SOOC JPGs that WB is an issue.

The key challenge with WB is that it is NOT about the colors in the scene, it's about the color of the light illuminating the scene. That's why AWB is more complicated than AF and the camera has to carefully analyze the actual sensor data and guesstimate the color of the light source based on the non-whiteness of the whitest objects in the scene. But if you know the light source for a panorama -- e.g., sunlight -- then pick "Daylight WB" as shoot away. Note that even for sunrise and sunset panoramas, Daylight WB does a nice job because retains the warmth of the light rather than make the scene look like it was shot midday.
Forum: Photographic Technique 04-03-2019, 08:38 AM  
AWB, how and when the camera decides?
Posted By photoptimist
Replies: 21
Views: 1,178
If you shoot RAW, you don't have to worry about these WB settings at all. The WB setting would only affect the thumbnail and may affect the default display of the RAW file in you software but it does nothing to the RAW data itself.

And you can "focus on some white thing out of frame to read off of and keep that locked." That's the "manual WB" setting.

P.S. I seriously doubt AWB delays anything. The processor has to analyze the image anyway before it can make the JPG (or the thumbnail). That analysis is almost certainly computed as the data arrives from the sensor so that it is completed merely an instant after the processor gets the last pixel from the sensor.
Forum: Photographic Technique 04-03-2019, 07:45 AM  
AWB, how and when the camera decides?
Posted By photoptimist
Replies: 21
Views: 1,178
I'm pretty sure AWB uses the data from the shot and that it is built into the Milbeaut processor. The processor also has to analyze the sensor data to create the review image on the back panel display and create the JPG version of the image.

It should be pretty easy to test if AWB creates a delay. Just start with a freshly formatted SD card, set the white balance to "daylight", and shoot a continuous-hi series of a stop watch. Download the data, reformat the card and repeat the shot with white balance set to AWB. You might also try the experiment using the multi-AWB setting which does an even more complex analysis of the scene.
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