Q -- Can one use a camera with a built-in light meter from the model's position aimed back toward the camera viewpoint and receive incident light readings ?
A -- No. That just won't work because your camera meter is set only for reflect light reading (the amount of light reflected off the surface), not the incident light (the intensity of the light that falls on the surface of the scene).
You can prove this to yourself vary easily by taking the meter readings from the two positions.
A light meter that has a "baffle" or cover over the photo cell can take both a from-camera-position and from-model-position light reading. The incident (model position) meter reading, favored in filming, is a more accurate way to measure the amount of light falling on flesh tones, enabling the editors to match skin tones through different scenes.
Incident light readings are not the best for still photography, however. Different colored and textured surfaces kick back the light in various amounts so the exposure varies from scene to scene.
Q -- I have heard about processing Ektachrome transparencies to a color negative instead of a reversal. I would like to try this. How is it done?
A -- You can develop Ektachrome and other transparency film to negatives by using the Kodak C-type chemical development kits. These can be bought in pint and gallon sizes at your photo store.
Use the new C-41 chemicals for E-6 process Ektachrome and others like Fujichrome that require E-6 processing. For E-4 types buy the C-22 kits.
Some films cannot be negative developed: These are Kodachrome 25 and 64 and Anscochrome and Agfachrome.