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Re: [OM] Incident Light metering

Subject: Re: [OM] Incident Light metering
From: "C.H.Ling" <ch_photo@xxxxxxxxxxxxx>
Date: Thu, 13 May 2010 20:51:34 +0800
Dawid, I also have some reserve for "An incident light meter simply cannot 
be equalled by any other in-camera reflected-light".

No matter incident light meter or in-camera meter, you need the knowledge to 
use it properly, both can be accurate or fail. Take an example for incident 
light meter:

Mid-day sun, top illumination, if you use lumisphere, the face exposure 
could be wrong. A lumidisc could be a better choice with proper angle facing 
the light.

For in-camera metering, there is a common way to simulate an incident 
meter - to meter an object with known reflective index. A simple object is 
your own hand (with +/- compensation) and a more precise one is grey card. 
You can set the grey card at a proper angle to simulate the object 
illumination.

I have been shooting slides with my OM-4/4Ti for some years without using my 
Sekonic 328F (which dedicated for flash and my Bronica SQ-A), I wouldn't say 
there is no error but for any complex situation I just spot on an object 
that I believe the reflection is near mid-tone, it "always" work.

IMO multi-segment-matrix is the most non-guarantee but simple and fast 
metering, it shouldn't be used as a benchmark for "accurate way of 
metering".


C.H.Ling


----- Original Message ----- 
From: "Dawid Loubser" <dawidl@xxxxxxxxxxx>


> John, care to elaborate? I stated in my first post, that
> when it comes to optimising exposure to capture the most dynamic
> range, multi-segment matrix meters and fully-electronic cameras
> may even have the edge.
>
> But when it comes to accuracy, a reflected-light meter is denied
> the simple fact of "how much light is there, actually?". I maintain
> that an incident light meter will always be more accurate to capture
> the chosen subject correctly (of course, provided you can actually meter
> the light, i.e. that it's not distant).
>
> I am open to discussion though :-) But you'll have to make a very strong
> argument, as the past couple of years of experience have taught me this.
> With any reflected-light meter, you have to become good at guessing
> exposure
> compensation, or taking multiple shots.
>
> With any of my mechanical cameras + incident meter, I am making much
> more accurate
> exposures than what my Canon 1-series SLR with multi-segment-matrix-
> metering
> ever did. Of course, it's a slower process.
>
> Dawid
>
>
> On 13 May 2010, at 2:48 AM, John Hudson wrote:
>
>>
>> ----- Original Message -----
>> From: "Dawid Loubser" <dawidl@xxxxxxxxxxx>
>>> An incident light meter simply cannot be equalled by any other in-
>>> camera reflected-light
>>
>> ****SHIT !!!
>>
>>
>> jh

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