Equivalent Exposure But Different Images

Photography - 101 Understanding Exposure
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Transcript

So I want to guide you all through a quick video regarding exposure and composition. exposure is a key component of the composition. But even while holding an exact exposure, you can actually arrive at a completely different composition by varying shutter speeds and or aperture. Now in this video, I want to specifically illustrate this via the aperture. Now, unfortunately, at this point, true story during the shoot, I completely lost his voice. So I'm going to walk you through what actually happened in the scene.

So for this scene, pious shooting Whitney in a seated position and pi placed Whitney in an area of really strong highlight under a tree, just so she could have some nice rim light on her hair. Now in addition, the tree branches in the background became a perfect element to demonstrate depth of field. Now also because her face was deep in the shadows, pies, having the lighting assistant, hold us Silver reflector close to Whitney, which is bouncing really powerful direct sunlight back into Whitney's face, and that's acting as the main light. Now from this point pi gets an exposure reading on his camera by metering from the model skin tone with the reflector light added and he's coming up with a reading of 116 hundredths of a second at f two, and it's an ISO 104 a proper exposure for skin. So at that point, we have our first shot here and here's the final shot straight out of camera.

And here it is the same image once it has been brought processed inside of Lightroom. Now again, if you all want to learn how to post process your raw images, be sure to check out the SLR launch Lightroom workshop collection after you complete this workshop series. Okay, so at f2 we have a really beautiful image where Whitney really pops off the background because the background just smashes into a wonderfully delicious bokeh. Now watch from here, pi adjusts up one full stop to ask 2.84 is aperture. And then he'll slow down the shutter by full stop to 100th of a second, which is actually exactly the same exposure as before. But now we see the depth of field shift a little to be a bit more deep.

Now the next equivalent exposure is at f4 in a shutter speed of one 400th of a second, again, identical exposure, but the image looks a bit different with more depth of field. Now let's go to five six and one 200th of a second. Now how about f eight and one 100th of a second. And then now at F 11. We don't want to slow the shutter down anymore at this point because it may prevent us from getting a sharp image. So rather than dropping the shutter to one 50th of a second pi keeps the shutter at one 100th of a second and then he adjust the ISO to 200 and then at F 16 pi keeps the shutter at one 100th of a second again But brings the ISO to 400.

And then finally, at F 22 pious the shutter still at one 100th of a second, and then the ISO is at 800. Now through every one of these shots, the exposures identical, but as we flip through them and compare them, look at how dramatically the composition changes from image to image as the aperture changes. So just remember, even though you have an identical exposure, your shutter speed and your aperture are going to greatly vary the compositional value of the image.

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