Archived posting to the Leica Users Group, 1999/12/23

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]
Subject: Re: LUG[Leica] Incident light measurement
From: "Jonathan Borden" <jborden@mediaone.net>
Date: Thu, 23 Dec 1999 16:24:42 -0500
 
Eric,

>Incident meter means
> the light falls on the sensor directly from the light source. That IS THE
> DEFINITION of incident meter. Reflective meter measures the light
reflecting
> off the subject, not just 18% grey subjects, as you inaccurately describe.
>
A quibble. The light does not fall directly on the sensor of common incident
meters. The light falls on a white dome which diffuses and transmits a
portion of the light to fall on the sensor. But whether this light is
transmitted or reflected the sensor doesn't know or care.

Jonathan Borden