Specific differences between neg and tranny apart, the fundamental {silver
halide) difference between high and low dynamic sensitivity is the extent to
which the emulsion is homogeneous or not.An amalgam of very different sized halide crystals will result in a film emulsion that is able to respond to a large range of exposures. It stands to reason that such an emulsion will exhibit graininess even where an exposure sufficient to form an image in the finer (less sensitive) crystals is given. This is because of the presence of the very large (in this case redundant) crystals. Hence, grain is the price one pays for dynamic range as well as overall sensitivity. Neg is freqyently horrible w/r to apparent saturation partly because the film grain appears as white spaces between color particles, rather than black. It is also noticeably poorer when shooting many studio style product images (in conditions where one could have lit the scene within a range suitable for transparency), but is great in many outdoor scenes. I am scanning a range of natural light night images of dune aficionados camping and driving around in the Algodones and it is amazing what can be seen in the shadows. philip =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
