[argyllcms] Re: Feature request (and an implied question)
- From: Ben Goren <ben@xxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 26 Jul 2010 14:41:13 -0700
> One issue to consider is that readings from different light meters are only
> comparable if they have the same directional characteristics. I think the i1
> has a light measurement head with a cosine response, while many light meters
> intended for photographic purpuses have different directional characteristics
> (e.g. hemispherical), see also http://en.wikipedia.org/wiki/Light_meter
Thanks for the caution. This particular meter has a retractible dome; in the
retracted position, it’s supposed to be a ``flat field'' response that,
by eyeballing it, would be the same basic geometry as the i1 (though the
aperture sizes differ, of course).
b&
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