I sometimes draw blanks on names so I have forgotten the name
of the color film available in the early 1930s. Not sure if Dufay
Color was available that early but certainly predated Agfa Color
or Kodachrome. Kodak also made a couple of early color films with
the names Kodacolor and Kodachrome but using different processes
than the later, more famous, films of those names. I am trying to
get stuff out of my memory I have not thought of for too long so
I am missing the cues I need. One early system used dyed starch
particles in the emulsion and another used stripes of ink on the
emulsion. Kodak also tried a lenticular color film using
cylindrical lenses impressed on the film support and a striped
color filter in front of the lens. Kodak's system was intended
for home movies. Lenticular film was never very successful. It
had many shortcomings plus was extremely difficult to duplicate.
Paramount Pictures tried it for theatrical movies with poor
success. Dufaycolor and the other process who's name I can't
think of, were quite successful for slides but also were
impossible to duplicate.
I think all of these processes were discussed in E.J.Wall's
book on color photography. Probably more detail is available now
on the web, I have not done a search. Some of these processes
needed to be on glass plates which is no doubt why Rollei
introduced glass plate adaptors. I should probably look all this
stuff up before posting but, as the math books say, its left as
an exercise for the student.
On 10/17/2020 12:45 PM, CarlosMFreaza wrote:
Hello Richard:
I agree with you 35mm color film gave a significative impulse for the Rolleikin improvement and production, however the first Rolleikin prototype was introduced in 1932 and the first Rolleikin version for the Rolleiflex camera was produced from 1933 up to 1934, before Kodak and Agfa introduced the firsts color films with significant commercial success in 1935/36. "The company stressed the following sales points (talking about the Rolleikin):Film can be cut after any frame and the rest still be used. Use of all packing types such as daylight-loading cartridges, daylight-loading refills and bulk film. In 1939, one more point was added: The Rolleikin is a valuable accessory for color photography because the new color films - Agfacolor - New and Kodachrome- are presently available only as 35mm film" (Rollei Report I, Claus Prochnow, page 12-263, quoting F&H advertisements at the time). The initial main reason to build the Rolleikin was the Leica and Contax cameras success and F&H wanted to offer an option to use 35 mm film for their Rolleiflex customers. It was six years after the first Rolleikin introduction that F&H stressed the color film use as a selling point for it; "The Rolleikin became one of the most important accessories".
Carlos
El sáb., 17 oct. 2020 a las 15:06, `Richard Knoppow (<dickburk@xxxxxxxxxxxxx <mailto:dickburk@xxxxxxxxxxxxx>>) escribió:
Don't forget that one reason for the 35mm adaptors was to
make color film available. 35mm color film became available in
the 1930s while roll format color was not available until
after
1945.
On 10/16/2020 2:24 AM, CarlosMFreaza wrote:
> Rollei TLR cameras have fixed focal length lenses except for
> some hundreds of Mutars, Rolleinars and some dedicated
Tele and
> Wide cameras; the regular camera is used with the fixed
focal
> length lens most of the times, however the Rollei TLR 6x6
> negative size and lens quality help a lot if a different and
> longer focal length is required for the scene, the camera
> manufacturers knew it and offered means to reduce the format
> and the lens angle of view causing a short tele effec
like the
> masks for the T and Rolleicord and the Rolleikin with the
> additional mechanism for 35mm; these features increase the
> Rollei TLR system flexibility.
>
> I like the square format and I try to compose for the square
> format all the time using the Rollei TLR and SL66 cameras,
> however there are situations where it's impossible to do
it. I
> had this situation last week-end photographing with the 3,5F
> Planar and Ilford Delta 100, I needed a short tele and I
used
> the Rolleikin effect (I uploaded an image bigger than the
usual
> size for my web images):
> https://flic.kr/p/2jVmP7H ;<https://flic.kr/p/2jVmP7H>
<https://flic.kr/p/2jVmP7H ;<https://flic.kr/p/2jVmP7H>>
>
> and this is a "regular" sht with the same camera and same
film:
> https://flic.kr/p/2jT7K9x ;<https://flic.kr/p/2jT7K9x>
<https://flic.kr/p/2jT7K9x ;<https://flic.kr/p/2jT7K9x>>
>
> Carlos
-- Richard Knoppow
dickburk@xxxxxxxxxxxxx <mailto:dickburk@xxxxxxxxxxxxx>
WB6KBL
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