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Re: [OM] Orange/Yellow filters

Subject: Re: [OM] Orange/Yellow filters
From: Jim Brokaw <jbrokaw@xxxxxxxxxxx>
Date: Mon, 27 May 2002 00:40:39 -0700
on 5/26/02 9:32 PM, Andrea at pdxgirl@xxxxxxxxxxxxx wrote:

> 
> 
> Hi fellow Zuiks -
> I hope this isn't too annoying.  I picked up some filters, essentially for
> "free" at the local Goodwill.  I know what to do with the 1A, UV and CP ones,
> but what do I do with the orange and yellows?  Could folks give me some ideas
> of fun stuff to try with these, or what they are generally used for?  (I'm
> hoping to go out and play with my new 300/4.5 in a couple of weeks when I can
> walk again - fingers crossed).
> - Andrea

Orange and yellow filters are for use with black and white film... mostly.
The principle with filters (for B & W) is that the filter lightens its own
color and darkens its complementary color. So the yellow filter will make
anything yellow in the pictures appear a lighter tone (more white
relatively) and anything blue (yellow's complementary color) will become a
darker tone. It will have some slight effect on other colored objects with
colors compounded using blue and yellow, for instance green leaves. The most
common use for yellow and orange filters with B & W film is darkening the
blue in the sky to make clouds stand out more. This effect can be
particularly dramatic with orange and even stronger with a red filter.

For color film, the yellow and orange will produce strange 'artsy' effects,
by creating an overall color cast to the pictures. An automated lab will
probably try to print the colors 'right' and you will freak out the
machine... Dark red filters are used with color infared film to create wierd
'false color' images, this can be pretty cool. Other colors will produce
neat effects with the color infared film, not 'scientifically correct' but
maybe interesting anyway.

Colored filters with very pale colors such as 85A, 85B, 81A, 81B etc. are
used to 'adjust' the light to match the sensitivity of the film in cases
where you are using tungsten film in daylight or vice-versa. These 'warming'
and 'cooling' filters can also be applied to images for correction i.e. you
might use a slight warming filter (85A) in open shade to counteract the
tendency of the light to be bluer than direct sunlight. With color film I
find the polarizer to be the most useful, it has the effect of darkening the
blue in the sky.

If you bought filters big enough (72mm) to use on a 300/4.5 for nearly
"free" you did pretty well, filters can be expensive in the larger sizes.
-- 

Jim Brokaw
OM-1's, -2's, -4's, (no -3's yet) and no OM-oney... 


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