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072/366: What ISO Means to Me [Uncertain Principles]
It’s a grey, dismal, rainy day here at Chateau Steelypips, and I’m a little groggy from cold medication. Which means it’s not a great writing day, but it is a good day to stay inside and do a little SCIENCE! for the photo of the day. thus, this:
Some toys and the cable box in our basement, shot at every ISO setting my camera offers.
This is a small assortment of toys set on the table in our basement next to the cable box, and photographed at every one of the eight ISO settings my camera offers. Everything else is the same in these shots– I put it on manual focus, the maximum aperture (f/1.8) and a fixed exposure time (1/10th of a second). I had a small flashlight shining on the (white) wall off to the left out of the frame, and no other lights.
These span a pretty impressive range, from “I think there might be some vague shapes off to the right of the clock” up to “Dude, that’s overexposed, back it off a little.” You can see some noise creeping into the ISO 12800 shot, but given that it’s made a dim basement look like bright daylight, that’s pretty impressive image quality. The ISO 800 image in the composite is probably the closest to what it “looked like” in the basement as I was taking these, with the obvious caveat that human eyes do not respond to light in the same way as a digital camera sensor.
So, there you go. My DSLR camera is pretty cool. Not sure I have a deeper point than that, here, but I’ve been curious about this for a while, and it’s fun to look at all those images together.
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Speaking of doing things for SCIENCE!, please consider filling out Paige Jarreau’s science blog reader survey, to help her postdoctoral research in communications.
Source: http://scienceblogs.com/principles/2015/11/11/072366-what-iso-means-to-me/
