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- Newsgroups: rec.photo
- Path: sparky!uunet!caen!sdd.hp.com!hp-col!sparks
- From: sparks@col.hp.com (John Sparks)
- Subject: Re: mixed light, film, and filters
- Sender: news@col.hp.com (Usenet News)
- Message-ID: <1992Nov20.165431.16994@col.hp.com>
- Date: Fri, 20 Nov 1992 16:54:31 GMT
- References: <1992Nov20.005403.16161@donner.SanDiego.NCR.COM>
- Organization: HP Colorado Springs Division
- Lines: 27
-
- In article <1992Nov20.005403.16161@donner.SanDiego.NCR.COM> ralandc@tara.SanDiego.NCR.COM (Raland Camara) writes:
- > 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?
-
- The best things to do is either make multiple exposures, each with only
- one type of light each exposure filtered for the light in use, or filter
- each light source to match. I used to work for an architectual photographer
- and we always did one or the other. We carried daylight and incandescent
- balanced fluorescent tubes that we would replace the existing tubes with.
- We carried big sheets of daylight-to-tungsten to cover the outsides of
- windows (though we usually worked at night to avoid this source, since
- it made multiple exposures impossible). We only used flash for fill if
- the illmuination was daylight or daylight balanced fluorescent tubes
- (these were Deluxe Cool White bulbs that cost about $20 each for 4 foot
- tubes), otherwise we used incandescents for fill. If the only sources
- are flash and fluorescents, you can filter the camera lens for the
- fluorescents (some magenta filter) and the flash with the opposite filter
- (green) to match the light to the flurorescents. I have read that
- Fuji Reala balances daylight, flash and Fluorescents well, but even it
- won't handle incandescents too. I have never used Reala for this purpose.
-
- If you cannot go to these extremes, your best bet is to filter for the
- predominant light source and hope the others will not interfere too much
- (or just use black and white film).
-
- John Sparks
-