That's the basic idea. Important elements can get lost when the necessary simplification occurs when creating a methodology and accompanying step-by-step approach. Ever notice how no method concerns itself with hold time? Now, I'm not just talking about how Simmons' shooting a wall example has no mention of the color temperature of the light, or color of the wall, or the choice of the material of the wall and how they reflect various wavelengths like infrared. Not only can this have differing effects on the film, but can influence the exposure meter which is the principle instrument toward measuring the testing conditions. The vague instruction of "take a meter ready of the wall" doesn't address whether the wall should be in specular or diffuse light, or the angle of the meter in relation to the camera potentially causing results very different from what is intended.
Originally Posted by Michael R 1974
While scrutinizing each element of testing is an important part of any evaluation of a methodology, let's not overlook the more fundamental question of theory, and how the methodology addresses it. Like what is the difference between the metered exposure and the speed point, or what is the metered exposure, or even what is film speed?
Simmons' use of the just black printing method is a good example the need to question the theory behind the approach. What are the assumptions about proper exposure and film speed that the use of this method suggest and are those assumptions correct?
Another example which is a personal favorite of mine is about metering the object and stop down four stops. Ever wonder where's the theory to support this assumption? What if this assumption is wrong, how will using this approach influence the results?
Personally, I find it kind of peculiar that people are determined to put all that effort to come up with their own testing method when one already exists that has been standardized. All the fiddling around introduces too many potential errors, but as they will persist in doing so, we need to approach each methodology with the proper level of skepticism.
Last edited by Stephen Benskin; 01-14-2013 at 09:46 PM. Click to view previous post history.