Comments on: How to make emergency glasses http://nateaune.com/2007/12/29/how-to-make-emergency-glasses/ Music, technology, travel and musings... Tue, 06 Jan 2009 08:33:26 +0000 http://wordpress.org/?v=2.7 hourly 1 By: David Fisher http://nateaune.com/2007/12/29/how-to-make-emergency-glasses/comment-page-1/#comment-27025 David Fisher Thu, 07 Feb 2008 09:15:53 +0000 http://nateaune.com/2007/12/29/how-to-make-emergency-glasses/#comment-27025 Squinting can work as well. You're simply going for a tighter aperture for hopes that there will be an increased depth of field in which all objects will be equally in focus. On a camera, this is normally close to f/11 or f/16 depending on the focal length. The downside being at this aperture that there's very little light coming in. More "open" apertures like f/1.0 will only have a tiny tiny distance range that is in focus, but it lets a ton of light in. Basically, this doesn't work well in the dark, but works great to read a streetsign on a sunny day. Fun stuff. I wonder what would happen if you got pulled over driving with two leaves taped to your eyes and told the officer that you lost your glasses. Squinting can work as well. You’re simply going for a tighter aperture for hopes that there will be an increased depth of field in which all objects will be equally in focus. On a camera, this is normally close to f/11 or f/16 depending on the focal length. The downside being at this aperture that there’s very little light coming in. More “open” apertures like f/1.0 will only have a tiny tiny distance range that is in focus, but it lets a ton of light in.

Basically, this doesn’t work well in the dark, but works great to read a streetsign on a sunny day.

Fun stuff. I wonder what would happen if you got pulled over driving with two leaves taped to your eyes and told the officer that you lost your glasses.

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