Archived posting to the Leica Users Group, 2001/09/26

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: RE: [Leica] What is the Sunny 16 rules reapplied to ambient light conditions indoors???
From: Hans-Peter.Lammerich@t-online.de
Date: Wed, 26 Sep 2001 20:47:52 +0200
References: <200109260701.AAA19319@mejac.palo-alto.ca.us>

In addition to the conventional, most film boxes contain some hints on
exposure setting indoors or at night. 
I have seen old calculator disks (from Agfa) with several, concentric
disks and segments which take into account a fistful of parameters (time
of day, clouds, winter/summer, latitude etc.).

Generally speaking, lighting conditions indoors are more complex. We
have direct and indirect sunlight through windows of various sizes. So
for objects close to large windows I apply the usual "outdoor" rules.
For objects behind smaller windows and/or farther inside, I make
deductions which however are difficult to generalise..

Artificial light is easier. Since lighting conditions in known places
hardly change, it makes sense to bring a meter once and then memorise
the readings. In an underground station and with 400 ASA I set 1/50s and
f1:2. One stop more for a department store, two or three stops more for
a modern, well lit office (1/125, f1:4). For these types of building
there should be design standards. My favourite pub starts at 1/30s and
f1:2 during the early evening. Later in the evening they dim light and I
go as low as 1/8s and f1:1.4. Living rooms in private homes are more
difficult, since many people prefer spotlights, reading lamps etc. over
a uniformly bright light from the ceiling. Within the beam of a reading
lamp, the above "office" rule applies. Outside, the "pub" rule is valid. 

Yes, automated cameras and even handheld meters are more convenient and
safer, but I sometimes like it the old fashioned. 

Hans-Peter
- --
To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html