YOU read this once : I was talking about AVOIDING
the need for exposure compensation so
you wouldnt need to do that , i.e. the meters/exposures
would match exactly without any exposure
compensation on one or the other, just a one
time tweek in a customs setting or menu or
something similar to allow adjustment of the metering
sensitivity.

Regarding self-containment. Film cameras
are self contained too, they dont need
a specific film to get the correct exposure,
they have ISO standards for exposure and you
CAN adjust the meter sensitivity on a lot
of SLRS so they meet an exposure standard
that has nothing to do with the film, only
the film speed is needed. And you can match
them WITHOUT any exposure compensation needed
on one or the other.


jco



-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
William Robb
Sent: Friday, December 15, 2006 3:16 PM
To: Pentax-Discuss Mail List
Subject: Re: Need Advice: value of an *istD outfit



----- Original Message ----- 
From: "J. C. O'Connell"
Subject: RE: Need Advice: value of an *istD outfit


> huh? the original poster already stated
> that his two pentax DSLRs  were not
> matched with respect to meter sensistivity.
> What does "self containment" ( whatever
> you mean that to be ) have to do with
> metering sensitivity? Or are you trying
> to say that are all perfectly matched
> to each other intially and forever?
> What if you dont Like or want the
> metering sensitivity the camera gives
> you ?( like the other poster didn't, he
> had to use exp. compensation to get what
> he wanted)

I'll explain this once, and hope you can get your head around it. Self
contained means that they aren't dependant on an outside source to 
do what they are supposed to do..
As an example, a film camera requires film to do it's job, therefor it 
is not self contained.

To match two DSLR cameras, you need to get the outputs (histograms) to 
match. This is easily done with exposure compensation.

William Robb

>
> This sort of user calibration would seem to be pretty unnecessary too,

> since DSLR cameras are self contained. Calibrating one to the other 
> would merely involve getting the histograms consistent.
>




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