Way back last year when the Pentax K100D (before the K10D) came out
including SR ("IS" in Oly speak), it also only worked with lenses that
communicated focal length info. People with M42 and older K mount lenses
complained that there should at least be the ability for the owner to
manually choose the focal length so that lens will become stabilized.
Pentax then put that feature in a firmware update for the K100D. As soon
as you pop on a manual lens, the lcd displays the focal length choices
and you just OK the correct one. (Same as on the K10D)
Can't Olympus just include this in a firmware update?
Larry
Phil wrote:
> Well I just trawled through some threads on DP review and found conformation
> that IS does not work with older lenses.
> Found this
>
> I can confirm that Olympus says it will not work with a manual lens.
>
> It MUST have focal length info from the lens in order to function.
>
> In this thread
>
> http://forums.dpreview.com/forums/readflat.asp?forum=1022&message=23567745&q=is+and+om+lenses&qf=m
>
>
> Regards
>
> Phil
>
>
>
> ----- Original Message -----
> From: "Johann Thorsson" <johann@xxxxxxxx>
>
>> I wonder why that would be? Perhaps the IS system needs to know the focal
>> length to optimize the movement compensation? At least that is the only
>> reason I could think of, it can't have anything to do with the f stop as
>> far
>> as I can see? And if I am correct, then it would also be possible to
>> supply
>> the IS system with that information by e.g. typing it in somehow, which
>> would make it possible to use the legacy glass.
>>
>
>
>
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