Re: PHOTO-3D digest 1483

[P3D Eric Goldstein <egoldste@xxxxxx>]

P3D Bob Howard wrote:

> NO spot meter gives a correct reading unless pointed at an 18% grey
> target or equivalent reflection. (e.g. in one reading).

Just a point of clarification... no spot meter gives a correct _average_
reading unless it is reading an 18% grey or equivalent.

A spot meter will read any reflectance accurately, but it will read it
as if it were 18% grey. It is then up to the shooter to place the value
where he or she wants it within the contrast range of the film. (ie "I
want this flesh tone one stop above 18% grey,", or "I want this shadow
three stops down from 18% grey," etc.)


> They are
> designed to read several parts of the scene and you calculate an average
> of the differt exposures noted. (On read a shadow and give two stops
> more exposure etc.)

Sure, it's another way to calculate exposure... 


Eric


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