| actinic light I'll throw in this bit -- see my older posts on ACTINIC light for more. Here's the basics:
Photographic emulsions, whether on film or glass or metal, are normally NOT sensitive to the entire visible spectrum. They are sensitive to UV, violet, and some blue light, which together are called ACTINIC. Emulsions only gain sensitivity to the green, yellow, red and IR bands by adding various dye and filter chemicals. Such additives were created from about 1885 onward -- any photography before then depended only on ACTINIC light.
The differences can be startling. ACTINIC sensitivity turns greens, yellows, reds, into black. You can see that in older Xerography with yellow highlighters obscuring text. Vegetation, skin tones, bright colors, all render in weird ways to modern eyes. Tintypes and other metallotypes using old emulsions produce images with such renderings.
We can grab the ACTINIC spectra by using old emulsions, or certain copy films, or by adding blue-violet filters to panchromatic-sensitive films and cameras. You don't get an authentic old-timey look by just using a sepia filter. On a digital or film cam, put a blue or blue-violet filter in front of the lens, and shoot monochrome. You'll see differences in tonality and depth of field, and you'll have difficulty focusing.
If you like the look, then try wet-plating, if you have patience. If you're patient enough to walk a cat on a leash, and crazy enough to snort glue, then wet-plate photography might be for you. |