There are 2 curtain types. Center weighted version is found only in low
serial number OM-2 (and at least one 2N that I worked on for National
Geographic). The lower the asa setting, the longer the low light
exposure. OM-2 will do auto exposures up to 19 minutes. While the 2N
instructions claim a 2 minute limit, in practice it's more like 3.5.
___________________________________
John Hermanson | CPS, Inc.
21 South Ln., Huntington NY 11743
631-424-2121 | www.zuiko.com
Olympus OM Service since 1977
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Stephan Van den Zegel wrote:
> Hello all,
> I know that there is two patterns for the OM2 curtains mosaics... the
> earlier OM2 having a strongly centered pattern while later ones have a more
> averaged one. When was the change from one to the second done ?
> And how many first version model were issued...?
>
> Are there other difference between those two evolution of the preN OM2 ?
>
> I heard that those early models don't have a time limit for the long pause
> time... they stay open until they are satisfied ;-) while further models
> shuts after 120 sec... could anyone refresh my memory on what model does
> what in that matter.
>
> Thanks
>
> Stephan...
>
>
>
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