Not at all. In fact I don't know the working of an a/d converter beyond that they take a stream of voltage readouts from the sensor and perform some voodoo ceremony upon it, whereupon the voltage levels at each photosite are assigned brightness levels of 0 - 255 for 8 bit files, or 0 - 4095 for 12 bit files. That's the sum of my understanding of the subject.
If someone who seems to be an expert makes an assertion without an explanation I can: (a) totally and naively trust their opinion; or (b) ask for some explanation. Option (a) has let me down in the past, so I choose (b). So my question is; when the a/d converter assigns arbitrary brightness levels to voltage levels, why can't they be assigned on a logarithmic scale rather than a linear scale? Can't it have a lookup table to adapt the numbers, or even just recalculate them on-the-fly? Hint - the correct answer is not "because it's not done that way" or "because it won't work". Regards, Anthony Farr > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ryan > Brooks > Sent: Saturday, 19 August 2006 12:32 AM > To: Pentax-Discuss Mail List > Subject: Re: Tonal gradation in shadows - The $67 Question? > > Anthony Farr wrote: > > Oh. I see. Why? > > > Because, you've obviously figure out something that electrical engineers > and physicists have missed for 20 years. Congrats! > > -Ryan > > -- -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
