[rollei_list] Re: ...Rolleikin
- From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sat, 17 Apr 2010 11:41:40 -0300
BTW Richard, your detailed explanation about the Rolleikin working is
very interesting, I always thought and think it's a very ingenious
accesory. I only use it with the 2.8C because I have the "Rolleikin C"
set dedicated to cameras with 35mm film counter from factory like the
2.8 C,D,E and firsts Tele-Rolleiflexes and then it does not include
the film counter knob. I'm thinking about to buy a set with this
counter to use with the 3.5F and 'cord IV.
According "The Practical Accesories" booklet, Rolleiflex above sn
1100000 and Rolleicord above sn 1137000 can use the Rolleikin 2
versions that include the double picture size back. Firsts cameras
above the mentioned numbers were still provided with the one size
picture back, but they can receive the double size back to work with
the Rolleikin 2. Earlier cameras can use the Rolleikin 1 with the
special back.
Carlos
2010/4/17 CarlosMFreaza <cmfreaza@xxxxxxxxx>:
> Richard:
> You are right about the wedge, the 35mm film passes
> through the rollers, I wrote from memory because my three TLR are
> loaded with film and thinking the 35mm film avoided the rollers (I use
> the Rolleikin once per year), the wedge works like film start; anyway
> it does not change the situation about the 220 film use since similar
> solutions regarding the wedge were considered here or in the other
> forum where this topic was discussed.
>
> The decision about to manufacture the first Rolleikin was taken in
> 1932 according an F&H document on December 6,1932 it's a minute after
> a meeting:"An accesory was presented that is designed for the use of
> 35mm film. The design was approved..."
> The main reason to manufacture the Rolleikin in 1932 was that B&W 35mm
> flm was improving and 35mm bulk film was cheaper than roll film
> allowing to Leica a significant market success. F&H Rolleikin
> propaganda stressed the advantages to use it in the Rolleiflex like to
> cut film after any frame and use of all paching types. It was only in
> 1939 that color films were added in the sales point:"The Rolleikin is
> a valuable accesory for color photography because the new color films
> -Agfacolor- New and Kodachrome...", it happened 6 years after the
> Rolleikin was introduced in the market in 1933 (Report 1, page 263).
>
> Carlos
>
>
> <dickburk@xxxxxxxxxxxxx>:
>>
>> ----- Original Message ----- From: "CarlosMFreaza" <cmfreaza@xxxxxxxxx>
>> To: <rollei_list@xxxxxxxxxxxxx>
>> Sent: Friday, April 16, 2010 12:42 PM
>> Subject: [rollei_list] Re: 220, it worked!
>>
>>
>> Hi John:
>> If I avoid the film feeler rollers putting the film on
>> the lower main roller directly or if I "stop" them from the beginning,
>> the frames counter never will be engaged, the film advances free up to
>> its end. The wedge in the Rolleikin inner spool knob has no effect in
>> the film transport mechanism, its purpose is to maintain fixed the
>> inner knob. The film transport mechanism working is modified for the
>> Rolleikin via the conjunction 35mm Counter knob/35mm film Guide
>> Frame/35mm film take-up Spool.
>>
>> I made any kind of experiments to work with 220 film without the
>> adaptation and it would be bored to comment about them, my conclusions
>> are that there are only two main ways for the automat Rolleiflexes,
>> one of them is using the additional tape at the right moment according
>> I commented previously and the other is -looking it the best way- that
>> one suggested by Dennis and explained below previously, it has the
>> advantages you needn't a tape and you needn't a dark bag or darkness
>> conditions, assuring the complete 24 exposures, anyway I did not try
>> this way yet, I'll try it for the next 220 film.
>> After to use the three rolls I still have in the freezer, I don't
>> think to use 220 film often, perhaps the next time the format is no
>> longer available, I hope it does not happen of course.
>>
>> Carlos
>>
>> When the Rolleikin is installed the internal film metering and counting
>> mechanism is not used. The camera remains in the constant wind condition it
>> is when first loaded.
>> When the back is opened to load the camera with 120 film the feeler
>> roller raises away from the guiding roller. Then, when the film is loaded
>> and the back shut the roller is pressed against the paper leader. When the
>> film and tape comes along it raises the feeler roller a little overcoming a
>> sort of latch, the feeler roller than opens up again and does not contact
>> the film until the back is opened and closed again.
>> When the Rolleikin is installed a small wedge on an arm attached to the
>> supply side adaptor adaptor is placed in between the two rollers. That keeps
>> the feeler roller raised when the back is closed. The crank turns and will
>> cock the shutter but it will just keep turning as it does when loading film
>> before the feeler incounters the increased thickness of the film and
>> securing tape. The Rolleikin has two parts to its metering. The main one is
>> inside the part that is inserted into the film gate. This has a sprocket for
>> counting the number of perforations that go by. It also has a latch that is
>> brought into contact with a ratchet on the take-up adaptor. this ratchet
>> controls the rotation of the take up spool. It is released by pushing in the
>> button on the counter knob that replaces the regular take up knob (but is
>> standard on some models). When pushed it pushes in a cam which re-sets the
>> latch on the metering part of the adaptor in the film gate. That allows
>> exactly eight perforations to go by before dropping the catch on the ratchet
>> and stopping the film. The amount of movement of the regular winding crank
>> to move this much film is enough to cock the shutter. The double exposure
>> mechanism does not work because the camera is always in the "loading"
>> condition.
>> On the Rolleicord IV the double-exposure prevention lever is moved to off
>> to allow the Rolleikin to work. This is also about the same as having the
>> camera in loading condition before it winds on the starting length of film.
>> I've fogotten how it works on earlier Rolleicords although I used a friend's
>> Rolleicord III years ago with a Rolleikin in it. The same Rolleikin fitted
>> my Cord IV.
>> The adjustable film plate (its not a pressure plate) is to change the
>> thickness of the film channel to account for the thinner 35 mm film. It also
>> moves enough to prevent interfering with the latching lever on the insert.
>> It is the position of this plate, not the guide rails, which control the
>> position of the film in the focal plane. By moving it slightly closer to the
>> lens the difference in distance of the film emulsion from the plate is
>> accounted for.
>> While the Rolleikin may be seen as a kluge it is a particularly elegant
>> one. It works extrememely well.
>> Presumably the original Rolleikin, the one with a replacement back, was
>> designed to make color film economical for use in Rolleiflex's and I rather
>> suspect the plate back was made for a similar purpose since some of the
>> first color films were coated on glass plates.
>>
>> --
>> Richard Knoppow
>> Los Angeles, CA, USA
>> dickburk@xxxxxxxxxxxxx
>> ---
>> Rollei List
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>
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