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Travis Wilson

Your career on your terms.

6

2

Shutter/Aperture Assignment

Given that it is 10 degrees outside with a windchill of -7 (gotta love Minnesota!) I decided to complete my assignments indoors. In my office there is a ceiling fan. I turned on the light to the ceiling fan even though there's a big window in the office to let a lot of light in. I did this to see how my photos would look given the contrasting light conditions.

I have links to all of my photo as they were too big to upload. I shot them using my Canon Rebel T3i using a 18-55mm lens.

Shutter speed - Blurry

First photo: https://docs.google.com/file/d/0B_G51UiJ2nwnVktsTlViUUFiSE0/edit

This first photo has an ISO of 6400, 0 EV, aperture of f/10, and shutter speed of 1/60. The white balance was set for "incandescent (3200K)," which accounts for cooler tones. You can see the light coming in on the right. I'm a bit put off by how "noisy" the photos is, but from what I understand that's because of the high ISO. 

Second photo: https://docs.google.com/file/d/0B_G51UiJ2nwnX0dOTFdFQzRTbWM/edit

In this second photo, I changed the ISO to 200, 0 EV, aperture of f/4.5, and the shutter speed was 1/20. I think that the picture is darker because the ISO is set so low. The slower shutter speed, from what i understand, should have let more light in since it was slower than the previous one. . I also had the white balance set for "daylight (5200K);" I think this accounts for the photo being more "orange." I photo is a bit "noisy," which I don't really understand why since the ISO was only 200.

Shutter speed - Stopped

First photo: https://docs.google.com/file/d/0B_G51UiJ2nwnTWktdlNueXJhOGs/edit

In this first photo, the ISO is 3200, 0 EV, aperture of f/3.5 and the shutter speed is 1/500. White blance was set to incandescent (3200K). It's a bit dark, but stops motion pretty well. I noticed, too that the photo is a bit blurry. It looked focusd through the camera; did I do something wrong?

Second photo: https://docs.google.com/file/d/0B_G51UiJ2nwnU2ItMVJtZDNrOXM/edit

In this second photo, I left the ISO the same as the photo before (3200) but changed the aperture to f/6.3 and the shutter speed to 1/320. White balance is still incandescent (3200K). I kinda like the darkness around the edges, but it's still a bit noisy, in my opinion. EV was 0. With a shorter shutter speed, i would have expected that this photo would be brighter since more light was being let in (I could be wrong, though). I also think that (and I could be wrong here, too) that the aperture value also dictates, to an extent, how much light comes in but I'm not sure why. I have two photos here and here. Everything is the same on them (ISO 6400, 0 EV, shutter speed 1/200) but in the first photo the aperture is f/20 and in the second photo the aperture is f/14. The second photo seems lighter to me. Can you delve into why this is, Ashley?

Aperture

I think one of the most confusing things about aperture is that a "wide open" one is a small number, and a "small" aperture is a large number! For these photos, I kept the ISO the same at 3200 and the white balance is on incandescent (3200K). I set out six books about five inches apart. The camera lens was about 20 inches away from the first book, and I set my focus on the first book.

Wide open aperture: https://docs.google.com/file/d/0B_G51UiJ2nwnXy1GWmpQMy1sdzQ/edit 

Small aperture: https://docs.google.com/file/d/0B_G51UiJ2nwndlZicGllZUpVeHM/edit

I noticed that as the aperture became smaller, in order to properly expose the camera I had to make the shutter speed shorter and shorter: in the wide open aperture photo (f/3.5) the shutter speed was 1/100, and in the small aperture photo (f/18) the shutter speed was 1/4. I wonder what would have happened if I maniuplated the ISO; I may try that off-line. 

Thanks, Ashley! Would love to hear your thoughts.

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