Originally posted by roscot You know, I started to write a sarcastic flip reply to you Rice, but decided it is just not worth the effort to argue with you. you never listen to anyone with a different opinion than your own.
I give up. You are right, you are always right. In fact you are a legend......... in your own mind
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Don't bother to reply, as I won't respond back.
Alan, I don't know why you should overreact, which is indeed not needed.
I did listen and read what you said but just that I disagreed with your suggestion. And, my point made is simple, that is, the Auto ISO is a PURE *Software* thing. My last statement re-quoted:-
"I can't think out a reason why the firmware cannot rectify the problem as the Auto ISO is just a *software* algorithm!"
To elaborate, the hardware, that is the light meter gives only the EV (Exposure Value) as its output. With the EV value, the camera could know about the environment/subject light level for a given ISO number. As for the Auto ISO, it is just an *algorithm* to raise the ISO number when the *detected* light level (by the light meter, i.e., hardware) is low.
As for the EV compensation, it has NOTHING to do with the hardware, nor, when the software algorithm to decide what ISO should be set, these two independent parameters should have any relationship. Note that the EV compensation is just a simple mathematical addition or subtraction function.
All in all, the Auto ISO is actually a very straight forward thing. I did write those firmware and software program decades ago (well, the died AIWA HiFi equipment, e.g., that why it died ;-)) and if I am asked to write such an Auto ISO algorithm or subroutine with a given EV value as the input, I would say it is just a simple and easy task for me and I have the full confidence to complete the software algorithm just within minutes.
So, afterall, I think your argument of "if Pentax could do it or they were able to do it, they should have done it already" is not substantiated. For example, Pentax could surely write a new firmware subroutine to release the focus adjustment feature like that available in the K20D but they just have not and won't do it forever.
In the end, they are just a company, who runs commercially, and thus needed to keep some features available at higher/newer models and locked those for lower models or older models, so as to differentiate different models and to reserve "motivations" for existing users to upgrade, i.e., to buy new stuff!