[pure-silver] Re: Basic question on light
- From: Jim Brick <jim@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Wed, 30 Mar 2005 07:05:21 -0800
At 04:27 AM 3/30/2005, Sauerwald Mark wrote:
>I have a basic question which I am having a hard time
>finding an anwer to, and I am certain that the
>luminaries on this list will be able to help me out.
>
>If I use my spot meter, and it tells me - for example
>to expose for 1/60 at f16 for 100ASA - what is the
>intensity of the light at that point in lumens?
A spot meter reads the reflected light. And that depends upon the color and
texture of the surface you are reading. I do not believe there is an easy
correlation between a reflected reading of an unknown surface and lumens. I
believe you have to directly read the light output itself in order to get
lumens.
IMHO,
Jim
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts:
