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20D Spot Metering

 
 
Charles Dickens
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      11-12-2004, 05:34 PM
As the 20D does not have spot metering, does it work to zoom in, take the
meter, then zoom out and take the pic?


 
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Mike
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      11-12-2004, 05:50 PM

You're freakin' kidding me??
If true, an attempt to leave a last gasp of air in the more expensive
models.

"Charles Dickens" <(E-Mail Removed)> wrote in message
news:cn2rvj$7fu$(E-Mail Removed)...
> As the 20D does not have spot metering, does it work to zoom in, take the
> meter, then zoom out and take the pic?
>
>



 
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Charles Dickens
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      11-12-2004, 05:59 PM
Hello Mike.

Well, I thought this would be the case, and so I didn't mention the
following fact, so it didn't bias the reply:

"Many modern zoom lenses (including some of Canon's) are variable aperture
zooms, and this method won't work with such lenses as you have metered at a
different aperture to the one you'll be taking the photo at. The technique
will only work if you use a constant-aperture zoom (such as Canon's L
series)."


"Mike" <(E-Mail Removed)> wrote in message
news:zJ6ld.24592$V41.10880@attbi_s52...
>
> You're freakin' kidding me??
> If true, an attempt to leave a last gasp of air in the more expensive
> models.
>



 
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Mike
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      11-12-2004, 06:01 PM

I don't see why the firmware can't compensate depending on what lens it
sees, especally if it's a kit lens or another lens designed in tandem with
the camera. I guess zoom/exposure-hold/unzoom (suitable only for the most
dextrous walkers+gum-chewers) or a best-guess exposure compensation is the
way to go then...
But I agree, why let a few good facts get in the way of a rant that's
probably true anyway

"Charles Dickens" <(E-Mail Removed)> wrote in message
news:cn2tfj$nb5$(E-Mail Removed)...
> Hello Mike.
>
> Well, I thought this would be the case, and so I didn't mention the
> following fact, so it didn't bias the reply:
>
> "Many modern zoom lenses (including some of Canon's) are variable aperture
> zooms, and this method won't work with such lenses as you have metered at
> a
> different aperture to the one you'll be taking the photo at. The technique
> will only work if you use a constant-aperture zoom (such as Canon's L
> series)."
>
>
> "Mike" <(E-Mail Removed)> wrote in message
> news:zJ6ld.24592$V41.10880@attbi_s52...
>>
>> You're freakin' kidding me??
>> If true, an attempt to leave a last gasp of air in the more expensive
>> models.
>>

>
>



 
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Dave Herzstein
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      11-12-2004, 07:26 PM
Charles Dickens wrote:
> "Many modern zoom lenses (including some of Canon's) are variable aperture
> zooms, and this method won't work with such lenses as you have metered at a
> different aperture to the one you'll be taking the photo at. The technique
> will only work if you use a constant-aperture zoom (such as Canon's L
> series)."


Since the 20D "knows" the lens's maximum aperture at any focal length,
it *can* reliably meter a scene with a variable aperture zoom.

-Dave
 
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John Doe
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      11-12-2004, 11:06 PM
It does have spot metering it just isn't as small a spot as what people are
used to. It is 9% instead of 2 or 3%.

John


"Charles Dickens" <(E-Mail Removed)> wrote in message
news:cn2rvj$7fu$(E-Mail Removed)...
> As the 20D does not have spot metering, does it work to zoom in, take the
> meter, then zoom out and take the pic?
>
>



 
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Ryadia
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      11-13-2004, 03:46 AM

"Randall Ainsworth" <(E-Mail Removed)> wrote in message
news:121120041924255093%(E-Mail Removed)...
> In article <cn2rvj$7fu$(E-Mail Removed)>, Charles Dickens
> <(E-Mail Removed)> wrote:
>
> > As the 20D does not have spot metering, does it work to zoom in, take

the
> > meter, then zoom out and take the pic?

>
> Why do you people think you need a spot meter for doing color
> photography?


Why Randall...
It should be obvious even to you that metering the point you wish to capture
when using a camera with limited contrast range is a most essencial process
to obtain a correct exposure of at least that part of the scene you consider
important. Of course B&W shooters don't need such precise control over their
shots... They just leave 'em in the dektol longer!

Douglas


 
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Skip M
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      11-13-2004, 04:29 AM
"Ryadia" <no.nospam@thisboy> wrote in message
news:Tsfld.34314$(E-Mail Removed)...
>
> "Randall Ainsworth" <(E-Mail Removed)> wrote in message
> news:121120041924255093%(E-Mail Removed)...
>> In article <cn2rvj$7fu$(E-Mail Removed)>, Charles Dickens
>> <(E-Mail Removed)> wrote:
>>
>> > As the 20D does not have spot metering, does it work to zoom in, take

> the
>> > meter, then zoom out and take the pic?

>>
>> Why do you people think you need a spot meter for doing color
>> photography?

>
> Why Randall...
> It should be obvious even to you that metering the point you wish to
> capture
> when using a camera with limited contrast range is a most essencial
> process
> to obtain a correct exposure of at least that part of the scene you
> consider
> important. Of course B&W shooters don't need such precise control over
> their
> shots... They just leave 'em in the dektol longer!
>
> Douglas
>
>

Unless you're shooting black and white digital. Then it would be nice if
the 20D had a proper spot meter...

--
Skip Middleton
http://www.shadowcatcherimagery.com


 
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John Doe
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      11-13-2004, 06:20 AM
Probably because on a number of occasions it has proven to the best way to
get the shot I wanted. Especially in back lit situations and the like. Just
because you don't use it doesn't others don't or don't want the feature. The
world doesn't revolve around one or two people that feel they are THAT
special.

John


"Randall Ainsworth" <(E-Mail Removed)> wrote in message
news:121120041924255093%(E-Mail Removed)...
> In article <cn2rvj$7fu$(E-Mail Removed)>, Charles Dickens
> <(E-Mail Removed)> wrote:
>
>> As the 20D does not have spot metering, does it work to zoom in, take the
>> meter, then zoom out and take the pic?

>
> Why do you people think you need a spot meter for doing color
> photography?



 
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John Doe
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      11-13-2004, 06:21 AM
Well, ain't that special!

John


"Randall Ainsworth" <(E-Mail Removed)> wrote in message
news:121120042151567469%(E-Mail Removed)...
> In article <Tsfld.34314$(E-Mail Removed)>, Ryadia
> <no.nospam@thisboy> wrote:
>
>> Why Randall...
>> It should be obvious even to you that metering the point you wish to
>> capture
>> when using a camera with limited contrast range is a most essencial
>> process
>> to obtain a correct exposure of at least that part of the scene you
>> consider
>> important. Of course B&W shooters don't need such precise control over
>> their
>> shots... They just leave 'em in the dektol longer!

>
> I believe in spot meters for doing B&W as per the Zone System, but for
> color work regardless of the media I've always preferred a simple
> reflected or incident meter (depending on conditions).



 
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