So, I've had this pair of 3D glasses sitting around the house, you know, the classic movie theater style, one eye red, the other blue / cyan. And I've always wanted to make stereoscopic pictures to take advantage of the whole 3D picture thing. So I finally did.
Patenteux.com was quite useful with some helpful instructions and their kindly provided Photoshop PSD template. Another useful resource to be noted is the University of North Carolina at Chapel Hill, which has a Computer Science department that kindly hosts a very, very extensive manual on the math and everything else that goes into making anaglyphs here (PDF format).
The long and short of it is that for human beings, one eye is separated by 6cm or so from the other. So you might think, 'ah, just move the camera 6cm or so from one shot to the next and that's it!'. Not quite. For the best 3D effect, the ideal distance from one shot to the next is 1/30th the distance from your subject.
Say you have a rubber ducky 30cm away from the camera. Well, you'd move the camera 1cm to the right for the second shot, rather than 6cm, which is way, way too much for an object so close. And if you're outdoors, and your subject is 30 meters away (I'm using the metric system because imperial / english units suck for math purposes), the ideal distance would be 1m from shot to shot, rather than 6cm.
Now you too can make your own anaglyphs!
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