NetNews Usenet Archive 1992 #27/NN_1992_27.iso/spool/rec/photo/20187

Text File | 1992-11-19 | 1.7 KB | 33 lines

Newsgroups: rec.photo
Path: sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!ncr-sd!SanDiego.NCR.COM!tara.SanDiego.NCR.COM!ralandc
From: [e-mail] (Raland Camara)
Subject: mixed light, film, and filters
Message-ID: <[e-mail]>
Sender: [e-mail] (News Owner)
Reply-To: [e-mail] (Raland Camara)
Organization: NCR Corporation, Rancho Bernardo
Date: Fri, 20 Nov 1992 00:54:03 GMT
Lines: 21

     I have some questions concerning the use of filters and film types
in mixed light photography.  There often occassions when it is possible
to have light from many different sources in a single setting.  For
example, it is quite reasonable to have daylight coming in from a window,
both tungsten and flouresent bulbs overhead, and flash being used as a fill.
All of these light sources are of different temperatures. Also, there
are films which are balanced for a particular type of light (temperature).
For example, there are both daylight film and tungsten film.  Lastly, I am
familiar with filters which can be used to provide correction when using
a particular film with a light source of a different temperature.  An example
might be a setting which is illuminated with tungsten lights and using
daylight film and a filter for correction.  My question is:

  What do you do when you may have multiple temperature light sources
  as described above?  Is there an easy way to caluculate what the best
  film type might be? and the correct compensation filters if any?


========================================================================
|) /||  /||\||\  /~ /| /|/| /||) /|   |    Raland Camara
|\/ ||_/ || ||/  \_/ |/ | |/ ||\/ |   |    [e-mail]