Archived posting to the Leica Users Group, 2000/09/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Like the example about the shiny car the same colour as the velvet, and therefore understand the need to change the exposure to get the same colour rendition on film. Thanks. Simon Brougham wrote: > > Maybe I can add a few helpful observations to what Mark already wrote. > > The film doesn't *care* about the light falling on the subject. The > film only cares about the light reflected off the subject, through the > lens, and falling onto the film itself. In most cases, an incident > meter will be plenty. > > Consider some extreme examples... > > A light bulb that is turned on in an otherwise-dark room (but not a > darkroom.) If you meter the light falling *on* the bulb, you're going > to overexpose. > > A blackhole that sucks all available light into it located in your > backyard, on a nice sunny day (so you can use the sunny 16 rule.) > Meter the light falling *on* the blackhole, assume that's the same as > that reflected back, and you're going to seriously underexpose said > blackhole. > > Back to a more realistic example... For the same light falling on a > subject, dull red velvet will reflect far less light back into the > lens than a shiny car painted the same hue of red. If you want to > render both reds to be the same, they will need different exposures > even if the ambient light is the same. > > > > __________________________________________________ > Do You Yahoo!? > Send instant messages & get email alerts with Yahoo! Messenger. > http://im.yahoo.com/ >