Eyes 20/10 with correction, where to get the sharpest prescription in the US? [more inside]
I've got an idea to fix the crappy automatic brightness sensor on my Android phone. Will it work / screw anything up? [more inside]
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.
Math/Optics: How can I derive the focal length of a lens from the magnification percentage of an image? [more inside]
Find-that-website filter: Website with a unique explanation of lens focal length with respect to photography and zoom lenses. [more inside]
What are some of your favourite bokeh lenses and settings for head-and-shoulder portraiture?
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]
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.
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?
Attention optics geeks: Will a flat water/air port affect a lens' minimum focus distance? [more inside]
Selective Depth-of-Field in Six Feet Under, and a question about lens flares. [more inside]
Canon 350D Digital Rebel XT
: Should I get it with the kit lense or without? If without, what lense would you recommend? [more inside]