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Re: [OM] [OM Pen FT meter numbers

Subject: Re: [OM] [OM Pen FT meter numbers
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Fri, 08 Mar 2013 18:07:57 -0500
A customer (whose FT I was repairing)  asked what f stops the numbers 
referred to.  I am referring him to the pdf of the Pen FT manual and let 
him take it from there.  he may just flip the f stop ring around and use 
his handheld.

BTW, I saw a sample of the Tamron 14-150mm zoom they are making for 
m4/3.  From at least the zoom ring back to the mount is all metal 
construction.  The zoom action is super smooth and "light".

___________________________________
John Hermanson  |   CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121  |  www.zuiko.com
Olympus OM Service since 1977
Gallery: www.zuiko.com/album/index.html

On 3/8/2013 7:59 AM, Chuck Norcutt wrote:
> Are you going to tell us why you needed to know?
>
> Chuck Norcutt
>
>
> On 3/7/2013 6:00 PM, John Hermanson wrote:
>> Thank you to everyone who helped on this.
>>
>> ___________________________________
>> John Hermanson  |   CPS, Inc.
>> 21 South Ln., Huntington NY 11743
>> 631-424-2121  |  www.zuiko.com
>> Olympus OM Service since 1977
>> Gallery: www.zuiko.com/album/index.html
>>
>> On 3/3/2013 2:46 PM, Frank Wijsmuller wrote:
>>> For visual proof of Chuck en my remarks look at the front page of this
>>> brochure... <http://www.skipwilliams.com/olympus/pen-lit/o-penft-1067.pdf>
>>> Clearly visible is the 0.5 minimum number of the 50-90mm lens.
>>> I'd guess it has something to do with the image circle of the lens and/or
>>> the non linearity of the light meter (it looks special).
>>> Best, Frank
>>>
>>>
>>>
>>>
>>> 2013/3/3 Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
>>>
>>>> But if you look at the detail given on the lens list 0 represents max
>>>> aperture on only about half of the lenses.  Some have max aperture = 0.5
>>>> or 1.0.
>>>>
>>>> Chuck Norcutt
>>>>
>>>>
>>>> On 3/3/2013 12:56 PM, John Hermanson wrote:
>>>>> According to the Pen FT owners manual I found on line, "0" on the Pen
>>>>> scale coincides with whatever the maximum aperture of the lens in use
>>>>> happens to be.  38mm f1.8, "0" = 1.8, 100-200mm f5 zoom, "0" = f5.
>>>>>
>>>>> ___________________________________
>>>>> John Hermanson  |   CPS, Inc.
>>>>> 21 South Ln., Huntington NY 11743
>>>>> 631-424-2121  |  www.zuiko.com
>>>>> Olympus OM Service since 1977
>>>>> Gallery: www.zuiko.com/album/index.html
>>>>>
>>>>> On 3/2/2013 4:51 PM, Frank Wijsmuller wrote:
>>>>>> Hi Chuck,
>>>>>> is this the brochure you read?
>>>>>> <http://www.skipwilliams.com/olympus/pen-lit/o-penft-1067.pdf>
>>>>>> A nice one anyway.
>>>>>> Best, Frank.
>>>>>>
>>>>>> 2013/3/2 Chuck Norcutt
>>>>>>
>>>>>>> I've never had a Pen before and knew nothing of this non-f/stop
>>>>>>> numbering system until I just looked it up in an Olympus Pen-FT
>>>>>>> brochure.
>>>>>
>>>> --
>>>> _________________________________________________________________
>>>> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
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>>>> Themed Olympus Photo Exhibition: http://www.tope.nl/
>>>>
>>>>
>>

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