[rollei_list] Re: Question regarding 10 Blade Aperture for Rolleiflex TLR

  • From: CarlosMFreaza <cmfreaza@xxxxxxxxx>
  • To: "rollei_list@xxxxxxxxxxxxx" <rollei_list@xxxxxxxxxxxxx>
  • Date: Sun, 18 May 2014 22:30:26 -0300

Evan:
           Attached files  to the group are not allowed according the
rules, however you could send them to my email address.

Carlos

2014-05-18 22:06 GMT-03:00 Evan Dong <dmarc-noreply@xxxxxxxxxxxxx>:
> Carlos,
>
> I will review the camera carefully and send the information here.
> I try to post a pdf with images.Am I allow to do so?
>
> On Sunday, May 18, 2014 8:31 PM, CarlosMFreaza <cmfreaza@xxxxxxxxx> wrote:
>
>
> Evan:
>         I'm not 100% sure your camera has a "transition" Compur
> shutter, I guessed that it was very possible, but I'm not sure. Could
> you describe the shutter speeds sequence for your camera? Could you
> describe the way you  lock and unlock the EVS?. I ask it to be sure if
> your model is according the original specs. I have no doubt your
> camera is a transition model regarding the means to lock and to unlock
> the EVS according its serial number, but I'm not sure about the
> shutter yet.
> It's difficult to find info about the aperture shape, because opinion
> at the time was that the shape of the aperture was of little
> importance. I obtained info on the matter through direct observation.
>
> Carlos
>
>
> 2014-05-18 19:31 GMT-03:00 Evan Dong <dmarc-noreply@xxxxxxxxxxxxx>:
>> Carlos,
>>
>> Thank You for your detailed information. I search through my set of
>> Rolleiflex books and also the Internet. I was not able to find this type
>> of
>> information. Basing on what you wrote, was the 10 blade aperture use to
>> deplete their stock before moving onto the newer 5 blade aperture? That
>> would make sense not to waste.
>>
>> Good to know that its a transition camera in the making. I will shoot a
>> roll
>> through before sending it off for a cla.
>>
>> Thank You for identifying what I have.
>>
>> Evan
>>
>>
>> On Sunday, May 18, 2014 10:40 AM, CarlosMFreaza <cmfreaza@xxxxxxxxx>
>> wrote:
>>
>>
>> Hello Evan:
>>                According my knowledge, all Compur shutters used for
>> the Automat series from 1937 up to about 1953/54 - Compur Rapid CR00,
>> CR00 X, Synchro Compur Rapid CR 00 MX, Compur Rapid CR 0 X 1/400s,
>> Compur Rapid CR 0 MX 1/500s, Synchro Compur (Rapid) CR 0 MXV-  have
>> the 10 blades diaphragm. Your camera is within the first serial block
>> for the MX-EVS, it already has the Compur shutter with linear shutter
>> speeds, but it's very possible with the 10 blades diaphragm yet, a
>> transition model. My Rolleicord IV manufactured up to September 1954
>> has the Synchro Compur CR 00 MX (Rapid, non linear shutter speeds and
>> special spring for 1/500) with a 10 blades diaphragm.
>>
>> Carlos
>>
>> 2014-05-18 9:48 GMT-03:00 Evan Dong <dmarc-noreply@xxxxxxxxxxxxx>:
>>> Carlos,
>>>
>>> Thank You for the breakdown of the MV-EVS series of Rolleiflex.
>>>
>>> I found that these series are better built when compared to the
>>> Rolleiflex
>>> T.
>>>
>>> I am in the process of selling off the Rolleifex T, to be replace by the
>>> MX-EVS Type 1 & 2.
>>> Of course condition is paramount, especially for the optics.
>>>
>>> In my most recent purchase of a MX-EVS, I notice the actual shape of the
>>> aperture to be round. I compared it against my other MV-EVS Type 1 & 2,
>>> plus
>>> the Rolleiflex T. Beside this one MX-EVS, the other Rolleiflex has the
>>> five
>>> blade aperture shape of a pentagon.
>>>
>>> I thought that only the 2.8C had the 10 blade aperture ad no other
>>> Rolleiflex camera afterwards. I was a tad surprise, so decide to ask for
>>> clarification.
>>> I searched eBay, as many variations are posted here and did find one
>>> example
>>> with plenty of photos.
>>>
>>>
>>>
>>> http://www.ebay.com/itm/Rolleiflex-3-5-A-Automat-6x6-10-BLADES-MX-K4A-TLR-ZEISS-OPTON-TESSAR-75-3-5-/351025366961
>>>
>>> For Marc, collector of Zeiss Serial Number:
>>> Here are some of the serial numbers to help identify it.
>>> Body: 1449149
>>> View Lens: 689439
>>> Taking Lens: Carl Zeiss Tessar 1326936
>>>
>>> With the exception of the 10 blade aperture, this camera appears to be a
>>> standard MX-EVS Type 1.
>>>
>>> Hope that this additional information will help.
>>>
>>> Thanks in advance,
>>> Evan
>>>
>>>
>>> On Sunday, May 18, 2014 7:58 AM, CarlosMFreaza <cmfreaza@xxxxxxxxx>
>>> wrote:
>>>
>>>
>>> You can see the Rolleiflex 3.5B or MX-EVS with the first EVS version,
>>> mentioned in my post, in one of my blogs; it's the rare model with the
>>> word "Germany" in the diaphragm wheel; it's the finfth image (click on
>>> the thumbnail):
>>>
>>>
>>>
>>> http://dobleobjetivo.blogspot.com.ar/2006/10/rollei-news-7-1954-brochure.html
>>>
>>> Carlos
>>>
>>> 2014-05-18 8:21 GMT-03:00 CarlosMFreaza <cmfreaza@xxxxxxxxx>:
>>>> I can answer about the MX-EVS taking info from Prochnow Rollei Report
>>>> II and my own experience. The MX-EVS is the 3.5B for this author, he
>>>> does not distinguish Type 1 or Type 2 but there are some differences
>>>> within this model, enough for other authors to distinguish 1 and 2.
>>>> This was the first Rolleiflex TLR with EVS system, it was manufactured
>>>> between April 1954 till September 1956, there were two serial numbers
>>>> blocks for this camera:1,428,000 till 1,499,999 and 1,700,000 till
>>>> 1,737,999.- 94,000 3.5B or MX-EVS were manufactured. The camera was
>>>> provided with three different taking lens:Tessar 3.5/75 (Carl Zeiss
>>>> Jena), Opton Tessar 3.5/75 (Carl Zeiss Oberkochen), Xenar 3.5/75
>>>> (Schneider). This camera used the linear Synchro Compur CR00 MX for
>>>> the EVS for the first time in a Rolleiflex. From the camera serial
>>>> number 1,700,000 (starting the second serial numbers block) were
>>>> introduced improvements for the EVS, f.e. the neutral or free
>>>> position. For the author Evans these improvements are enough to call
>>>> the 3.5B "MX-EVS Type 2" from the serial number 1,700,000.-
>>>>
>>>> There were three technical moments for the EVS development. We can
>>>> find the first moment in the firsts 3.5B or MX-EVS Type 1 cameras,
>>>> these cameras don't have the middle button in the diaphragm wheel to
>>>> lock-unlock the system, these cameras are from the serial number
>>>> 1,428,000 till 1,464,000 (this complete block is till 1,499,999). Some
>>>> of these rare firsts MX-EVS have  the word "Germany" in the diaphragm
>>>> wheel, Prochnow shows a photograph in 16-358. I think this camera is
>>>> rare today,  the serial numbers block is shared with the 2.8C.- The
>>>> second technical moment for the EVS was the central button that you
>>>> need to maintain pressed to unlock the EVS, it was added from the
>>>> serial numbers 1,464,000 till 1,499,999, I think this camera is well
>>>> known and in general the users indentify it as "MX-EVS type 1", but
>>>> really it is a second EVS evolution. Prochnow shows a front panel
>>>> photograph also in 16-358.- The 3.5B "MX-EVS" Type 2 (according Evans
>>>> name) has the EVS mechanism more perfectioned with the  free wheel or
>>>> neutral wheel position, avoiding to maintain pressed the button to
>>>> unlock the EVS, this system is also used in the 2.8D, E, 3,5E and
>>>> other Rolleiflex models (some Rolleicords and T also have EVS but the
>>>> means to set it are different), this is a third evolution, Prochnow
>>>> shows a front panel also in 16-358. This evolution started in the
>>>> second serial numbers block for the 3.5B, 1,700,000 till 1,737,999.-
>>>>
>>>> Carlos
>>>>
>>>> 2014-05-18 0:05 GMT-03:00 Evan Dong <dmarc-noreply@xxxxxxxxxxxxx>:
>>>>> I have a question that I was unable to locate any information for a 10
>>>>> blade
>>>>> aperture Rolleiflex TLR other than the 2.8C.
>>>>>
>>>>> I have a Rolleiflex MX-EVS Type 1 that has a round blade formation,
>>>>> rather
>>>>> the pentagon shape usually encountered.
>>>>>
>>>>> What information is available for the other than a 2.8C Rolleiflex?
>>>>>
>>>>>
>>>>> Evan Dong
>>>>>
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