Godfrey wrote: Designers of imaging sensors typically try to maximize sensitivity while minimizing noise, and there are many physical constants here that limit deviation from a norm to within a very small range of values. From most of my friends at Agilent, what the whole thing boils down to in general is how large the photosite is and how efficient the microlens is at delivering light energy to the photosite well
----- Curious that the base ISO is usually a round number that photographers are comfortable with--50, 100, 160, 200. No sensors at, for example, ISO 76 or 137. This makes me suspect that a specific base ISO can be designed for. Joe -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net