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Step 8Get Color Filters
There are many places you can get color filters to use for making anaglyphs.
If you want to experiment, the Roscolux Gel Sample Swatchbook contains many calibrated theatrical lighting 1.75x2.75" gels and sells for about $2. However, we really want the viewing and capture filters to match, so cutting-up an extra pair of cardboard viewing glasses to get the filters works nicely.
Anaglyph viewing glasses come in many color combinations, but all color combinations are not equally effective for anaglyph capture. The primary reason is that most digital camera sensors distinguish colors using a Bayer filter with a repeating pattern containing two greens, one red, and one blue. Thus, in order to minimize ghosting and balance capture resolution between the left and right views, we are forced to code one side as green and the other as magenta (red plus blue). It doesn't matter much which side is which, but green-left glasses are most common.
Red/cyan glasses would be the obvious second choice among the commonly-available viewing colors. Of course, you have to use the same color combination for both capture and viewing (unless you do some fairly scary post-processing).
These are all gel filters that scratch easily, so avoid handling them.
If you want to experiment, the Roscolux Gel Sample Swatchbook contains many calibrated theatrical lighting 1.75x2.75" gels and sells for about $2. However, we really want the viewing and capture filters to match, so cutting-up an extra pair of cardboard viewing glasses to get the filters works nicely.
Anaglyph viewing glasses come in many color combinations, but all color combinations are not equally effective for anaglyph capture. The primary reason is that most digital camera sensors distinguish colors using a Bayer filter with a repeating pattern containing two greens, one red, and one blue. Thus, in order to minimize ghosting and balance capture resolution between the left and right views, we are forced to code one side as green and the other as magenta (red plus blue). It doesn't matter much which side is which, but green-left glasses are most common.
Red/cyan glasses would be the obvious second choice among the commonly-available viewing colors. Of course, you have to use the same color combination for both capture and viewing (unless you do some fairly scary post-processing).
These are all gel filters that scratch easily, so avoid handling them.
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Most of my glasses are of red/blue variety, they are good for most of the anaglyphs pictures and movies on the web. Would a red/blue combination work? Or it is worth it to stick to your suggested green/magenta combination?
To answer your other question, I used a Sony A350 DSLR to capture the anaglyphs in steps 12 and 15. In general, DSLRs -- and film SLRs -- with appropriate lenses produce high-quality anaglyphs with greater depth than most smaller format cameras. However, optical viewfinders can be too dark for good composition, so a live view that "gains up" nicely can be very useful.