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Re: [OM] 2 series screen quick question

Subject: Re: [OM] 2 series screen quick question
From: John Hermanson <omtech1@xxxxxxxxxxx>
Date: Fri, 07 May 2010 08:57:44 -0400
Sorry, I don't have any.
___________________________________
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


Angel Lobo wrote:
> Please, some 2 series screen (4 or 13) NEW for sale ?
> 
> Angel Lobo.
> 
> 2010/3/19 <usher99@xxxxxxx>
> 
>> According to John, the correction for use in manual depends on focal
>> length.  Even if the meter is adjusted  to read correctly for a
>> 2-series on a 1N or OM-2N for a 50mm,  by 100mm there is a 1/4 stop
>> overexposure indication and 2/3 of a stop on a Z 180/2.8.
>> I believe there are errors on the short end too.  OTF metering is
>> unaffected AFAIK.
>>
>> Mike
>>
>>
>>
>> So I know that the meter in an OM-1 and OM-2 will read 2/3 stop over
>> correct exposure when a 2 series screen is installed (ie will
>> underexpose by 2/3 a stop); and that the OM-2 measures all exposures
>> at speeds slower than 1/45 second OTF in auto mode; my question is,
>> will an OM-2n with a 2 series screen installed give accurate exposures
>> at all speeds in auto mode, or will it only give accurate exposures at
>> shutter speeds slower than 1/45 a second?  I have a modified 2-4
>> screen that I would like to install in my OM-2n, but if it results in
>> underexposure at faster speeds, I will put it in my OM-1n instead and
>> simply compensate the 2/3 a stop by using the ASA dial.
>>
>> I happen to like the OM-2n's aperture priority, and don't really want
>> to have to use it manual mode in bright light.
>> --
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>>
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