Join 3,572 readers in helping fund MetaFilter (Hide)

12 posts tagged with lens and optics. (View popular tags)
Displaying 1 through 12 of 12. Subscribe:

Sharp eyes, sharp eye exam?

Eyes 20/10 with correction, where to get the sharpest prescription in the US? [more inside]
posted by zippy on Sep 17, 2012 - 12 answers

Hardware mod to fix Automatic Brightness on Android smartphone?

I've got an idea to fix the crappy automatic brightness sensor on my Android phone. Will it work / screw anything up? [more inside]
posted by anthill on Nov 2, 2011 - 8 answers

Why are microscope lenses so small?

Why are microscope lenses small and camera lenses large? Surely having large lenses on microscopes would let you gather more light from the thing you're trying to examine and give you a clearer picture.
posted by Joe in Australia on Sep 3, 2011 - 9 answers

How to find focal length from image magnification % ?

Math/Optics: How can I derive the focal length of a lens from the magnification percentage of an image? [more inside]
posted by ScarletPumpernickel on Mar 13, 2011 - 10 answers

Find it: Website with a unique explanation of lens focal lengths.

Find-that-website filter: Website with a unique explanation of lens focal length with respect to photography and zoom lenses. [more inside]
posted by odinsdream on Dec 24, 2008 - 7 answers

Bokeh galore

What are some of your favourite bokeh lenses and settings for head-and-shoulder portraiture?
posted by johannahdeschanel on Sep 12, 2008 - 19 answers

What to do with a ruined zoom lens?

What can I do with a "ruined" autofocus SLR zoom lens? Anything cool/neat I can turn it into? Any fun optics demonstrations I can do with the lenses inside? [more inside]
posted by kcds on Nov 20, 2007 - 5 answers

tap that glass

I'm interested in fitting odd lenses -- and making custom lenses -- to/for digital cameras and digital video cameras. I'm not terribly concerned with the electronic side of things, so you shouldn't be either. What I'm looking for is a crass/crash course in optics -- something (a book, a video, a class, a kit) that will teach me the basics of optics and allow me to force photocopier lenses, telescopes, and microscopes onto unsuspecting recording devices.
posted by fake on Dec 28, 2006 - 12 answers

Weird optics

Let's say I find a shiny spherical object and under point lighting, I move it very close to my eye. I then focus on the bright spot, but focus at a distance of 1-2 feet until the patterns are in focus. At this point, it looks like a bad microscope. Am I looking at part of my own eye? Is this a documented phenomenon I could read about?
posted by aye on Oct 21, 2006 - 19 answers

Peering into the depths of AskMe

Attention optics geeks: Will a flat water/air port affect a lens' minimum focus distance? [more inside]
posted by Popular Ethics on Apr 20, 2006 - 6 answers

Depth of Field and Focus. How do they work?

Selective Depth-of-Field in Six Feet Under, and a question about lens flares. [more inside]
posted by odinsdream on Oct 4, 2005 - 12 answers

What should I look for when purchasing a camera lense?

Canon 350D Digital Rebel XT: Should I get it with the kit lense or without? If without, what lense would you recommend? [more inside]
posted by odinsdream on Jul 7, 2005 - 10 answers

Page: 1