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Photography

Digital photo lenses that distort

I like fine camera lenses, but the best quality are very expensive. There are many things that are hard to do in a good lens -- you want a sharp image, of course, over the full flat plane. Over the whole image plane you want low flare, high contrast and low chromatic abberation (ie. red and blue focus in the same spot.) And you want low distortions.

Most camera lenses try to be "rectilinear." That means they try to make a straight line straight in the image. This isn't actually natural, due to perspective straight lines are not straight.

So I wonder if we might soon see a new lens where no effort is made to fix distortions or make the image rectilinear, and all effort goes into the other factors. You are thus expected, with every image, to do digital post-processing to get a non-distorted rectilinear image. That will mean some small loss of image quality at the edges of the image, but probably a less distorted image than ordinary lens physics can deliver -- and a lot less cost -- in exchange.

Of course, this would primarily be for digital cameras, but a film user could also use the lens if they planned to scan their film for digital processing, as most do these days.

Down the road, each lens might contain within it the specifics of its own particular distortions, and the camera might be able to fetch this and either process directly or store it with the image for post-processing. Indeed, the lens might be a cheaply made lens with distortions due to the poor quality elements, or it might be a fine lens with deliberate distortions. (I have wondered if some P&S digicams might be doing this already.)

Universal underwater photography case

Generally, getting a case to use a camera underwater is expensive. The case has to be custom made for the particular camera, and it has to be full of waterproof push-through button-pushers for all the major controls. Digital cameras have helped a lot, since they can shoot far longer on a "roll" and things like zoom are electronic. They also sell in enough volume that some cases have gotten down to reasonable prices.

Transit of Venus 2004

I took a trip to Toronto in part to see the very rare transit of Venus over the face of the Sun. I was lucky enough to get some great photos.

See my gallery of Venus Transit 2004 photos with notes.

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Digital Photo Organizing in the future

We're not there yet, but let me write my notes about what future digital cameras might do to help us organize our huge collections of photos:

  • GPS and compass in the camera knows where it is, and where it was pointing. Thus, if standing on the south rim of Grand Canyon and pointing north, probably a picture of the Grand Canyon. Organize your photos on a map.
  • Record audio said while taking photo if special button pressed. Later, upload audio to PC where it's able to do speaker-dependent speech to text at its leisure to caption the photos.
  • Face recognition. No, I'm not kidding. While this is Big Brother technology, and not very useful in airports, one thing it can do is try to find similar faces. So once you tag your mother, it will be able to search your photo collection for other shots with your mother. This is much easier than trying to take a random person and see if they are on the FBI wanted list.

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