Re: PHOTO-3D digest 1130

[bobh@xxxxxxxxxxxxx (Bob Howard)]

RE: Rick Nothern Telecom: Type A Filters for Kodachrome!
 
Rick you have confused the Type A FILM with the filter!! The
Kodachrome A was used (without filter) with photofloods 3400 deg
Kelvin lamps. NOW the filter called type A was put on the camera (a
pair on the Realist) to use this film in DAYLIGHT. The filters were
removed for indoors with tungsten or photoflood. THIS was very handy
as the film without filter was about 25ASA and will the filters was
ASA10, the same as daylight film, so exposures were as you were used
to, but with this one film in camera you could shoot both.
(Converting Daylight film to flood was never good as the heavy blue
filters cut the ASA10 by two stops.) Another advantage of using type A
film was that the orange type A filter was a superior haze and uv
filter which was even better than a "skylight" at getting the purple
out of Kodachrome on pavement etc. (UV effect). If built in electronic
flash (requiring daylight film) hadn't killed off Type A we could
still do this...but no one wants to fool with flood lights anymore.
BobH


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