jvarsoke said:
The specs from my friend aren't that specific. She was given a painting (oil) from another friend. The artist would like to have a photo of it for her portfolio or something. I'm assuming slide film here. But this is just a guess.
I don't have much in the way of equipment, and I don't do this normally. I'm not even sure what kind of quality is expected. But I'd like to do this on the cheap. But don't know if it's possible to stand a few 80watt bulbs up to make the exposure from a 35mm or not.
This is not a paid gig, I'd just like to make something reasonable.
-j
I do this frequently for artists and magazine covers. The ideal way to shoot art is to light it with two matched strobes at 45 degrees from the camera lens axis. This angle may need to be adjusted slightly to cancel out reflections from the art if is is shiny, like acrylics or oils, especially if they have been varnished. If the reflections persist, then use polarizing screens over the lights and a polarizing filter over the lens.
All the above is for general information; if you don't have the equipment to do it that way, then find a shady area, preferably outdoors, where the painting will be illuminated evenly by north light. Meter with an incident meter; check the reading at center of the painting and all 4 corners to insure that the light is even. Devise a way to hang the painting vertically, and use a level to insure that it is exactly vertical. Mount the camera on a tripod and level the camera. Do not tilt the camera to get the painting in the viewfinder; raise and lower it with the tripod post or legs, but keep it perfectly level. Center the lens axis on the center of the painting. This is to avoid keystoning. The film plane and the painting should be parallel. Fixed focal length lenses are better, to avoid any barrel or pincushion distortion. It is tedious work.
Naturally, the larger format the camera, the better. I use 4x5 for transparencies for reproduction. If she wants slides, then obviously shoot 35mm. If she wants prints for a portfolio, then 35mm or medium format should be fine; but larger is always better.
If the final product will be a print, then a negative film without enhanced saturation or contrast would be best. I like Portra NC. If she wants slides, then again, you want to avoid high saturation/contrast films. The best I have found is Kodak EPN; it is designed specifically for applications that require accurate color balance, such as for art works.
Ideally, you should check your lighting with a color meter and filter to match the film color balance. In practice, my studio flashes usually give me accurate color. With available light, watch out for colored reflective areas that might tint the light on the painting. I bracket transparency film one stop either way, in half stop increments, making five exposures.
Hope this helps,
--Eddy