The blue histogram is a useful feedback tool for controlling your background exposure and its blue ocean-filtered sunlight. You can use information in the blue channel to give you a guide for how to adjust your shutter speed.
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- [Instructor] In part three of the elements…of wide angle exposure, we're going to be taking a look…at the relationship between the shutter speed,…the background and the blue histogram.…So, in other words, Hergen's going to be showing you how to use…the blue histogram in order to gauge how well…your shutter speed setting is accommodating the exposure…of the background.…- [Hergen] So as Deke mentioned, we're going to look at shutter…speed and it's relationship to the Blue Channel,…and how it relates to the background subject exposure.…So, underwater, ambient sunlight is really our only source…of blue light, therefore the blue channels is pretty…much going to show us the exposure of the background.…
So, let's take a look at this relationship…through some images.…So in this series of images,…the apertures remaining constant, as is the strobe exposure…of the foreground subject.…The only thing we're going to be changing is our shutter speed.…- [Deke] And so as we discussed in the fundamentals course,…shutter speed is what's responsible for the exposure…
- Wide-angle optics
- Blending and contrasting exposure
- Controlling exposure with aperture
- Lighting underwater
- Shooting on walls and slopes
- Composing underwater shots
- Capturing rays of sunlight
- Going in for close focus
- Post-processing in Lightroom
Skill Level Intermediate
1. What Is Wide Angle?
5. Special Techniques
6. Post Processing
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