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- Path: sparky!uunet!usc!cs.utexas.edu!torn!utcsri!csri.toronto.edu!acs
- Newsgroups: rec.photo
- From: acs@csri.toronto.edu (Alvin Chia-Hua Shih)
- Subject: Re: 80A 80B 80C Which filter?
- Message-ID: <1992Dec31.034124.23587@jarvis.csri.toronto.edu>
- References: <1hsst0INN3gt@gvgspd.gvg.tek.com> <344@metran.UUCP>
- Date: 31 Dec 92 08:41:24 GMT
- Lines: 57
-
- In <344@metran.UUCP> jay@metran.UUCP (Jay Ts) writes:
-
- >pjs@gvgdsd.GVG.TEK.COM (Peter J. Stonard) writes:
- >: I have a couple of questions about colour balance.
- >:
- [ Tale of mixed lighting woes snipped... ]
-
- >: What if I want to combine a long exposure with artifical light,
- >: using the blue filter, and add a flash for freezing motion or
- >: lighting the subject? Is there a yellow gel that compliments the
- >: blue filter, that can be placed over the flash?
-
- There are filters that allow the use of tungsten balanced film in
- daylight (85B). You could try to get one to cover your flash head.
- Problem is that most flash heads aren't designed to take filters, so
- you have play arount with tape, velcro, or whatever.
-
- Cokin make an 85A filter. Since it's square, it should be more
- adaptable to your flash head. However, some feel the Cokins aren't
- totally accurate. Might be neat to see of you can modify a Cokin
- filter holder to go over your flash head without darkening the edges.
- Opens up some weird and wonderful possibilities.
-
- Similarly, there are filters to make your flash act like a fluorescent
- light source. I believe Calumet is a mail-order source for these.
- However, I think the filters come in large sheets (for covering
- windows) and may be more than you need. (They can be cut down to size
- though.)
-
- If there isn't much ambient light falling on your subject from
- artificial light sources, then hitting 'em with your flash on daylight
- film may help shift the balance favourably. Your artifical light
- sources may look a little funny (greenish, under some kinds of street
- lights), but your main subject won't be so badly off. However, it
- is still preferable to not mix one's light sources.
-
- If you're in a small room, try shooting at your fastest X-sync speed to
- reduce the amount of ambient light, and try to overpower the existing
- lighting with the flash.
-
- Fuji Reala is supposed to have a blue-green sensitive layer to handle
- off-lighting conditions like fluorescent. That is definitely worth a
- try if Reala is fast enough for you (ISO 100). There have also been
- reports that Fuji HG 400 Professional (NHG) is pretty reasonable under
- flourescent lighting (my experience agrees with this--friend's wedding
- pictures in the computer lab).
-
- Hope that helps.
-
- ACS
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