[Leica] R9 users, is there no exposure lock when using matrix metering, only on spot and average?

[photo.forrest at earthlink.net (Philip Forrest)]

I think that exposure lock switches matrix to center-weighted at the
time of making the calculation. That is, if the camera allows the two
to be set at the same time the program would have to shift out of
matrix or else there would be too many images that would be just
unusable due to things like bright/dark areas that the matrix too
account for but then were not in the final exposure. My F4 did this, if
I recall correctly.

Phil Forrest



On Sat, 12 Mar 2011 19:33:09 -0600 (CST)
grduprey at mchsi.com wrote:

> Marty,
> 
> Are you sure it works? Matrix metering by definition is a program
> that takes all of the light values seen in several regions of the
> frame and runs them through a complex program to come up with a
> exposure value for proper exposure.  Exposure lock would be useless
> in this mode.  My wife's D200 has matrix and exposure lock does not
> work in this mode. Same with my R8.
> 
> Cheers,
> Gene
> 
> ----- Original Message -----
> From: "Marty Deveney" <benedenia at gmail.com>
> To: "Leica Users Group" <lug at leica-users.org>
> Sent: Saturday, March 12, 2011 6:09:25 PM GMT -06:00 US/Canada Central
> Subject: Re: [Leica] R9 users, is there no exposure lock when using
> matrix metering, only on spot and average?
> 
> Exposure lock works in matrix mode on my Nikon F90x, F100, F4 and F5
> cameras.  I just tried it.
> 
> Leica must think that this is the way you _should_ use matrix
> metering.
> 
> Marty
> 
> On Sun, Mar 13, 2011 at 7:23 AM,  <grduprey at mchsi.com> wrote:
> > Vick,
> >
> > Matrix metering is a computer averaging program using a whole slew
> > of factors. ?Because of this there is no exposure lock, as you do
> > not have a single point to lock onto. ?By definition the computer
> > program makes the exposure from an average of all levels in the 5
> > zones used by the camera. ?You can lock on to a single value only
> > in spot mode. ?This is the same even if you use a Nikon, Canon,
> > Sony etc. ?The R9 manual explains this quite clearly.
> >
> > Cheers,
> > Gene
> >
> > ----- Original Message -----
> > From: "Vick Ko" <vick.ko at sympatico.ca>
> > To: "Leica Users Group" <lug at leica-users.org>
> > Sent: Saturday, March 12, 2011 2:27:45 PM GMT -06:00 US/Canada
> > Central Subject: [Leica] R9 users, is there no exposure lock when
> > using matrix metering, only on spot and average?
> >
> > Hey, R9 users, is there no exposure lock when using matrix metering,
> > only on spot and average?
> >
> > Mind checking on your camera for me?
> >
> > On mine, only the spot and average metering work with the exposure
> > lock, i.e. locks the exposure when I push to the 2nd pressure point.
> >
> >
> > Vick
> >
> > _______________________________________________
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> >
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> >
> 
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