"Kotsinadelis, Peter (Peter)" wrote:
>
> Ken Lin wrote:
> I wonder if this can be further "proven" by some who has one of these
> super-tele lenses to listen for the IS sound, both of my "lesser" IS lenses
> can be heard while IS is in operation.
>
> __________________________________________________________________
>
Hi Peter-
> You can hear the IS faintly with a 300 F2.8 IS and a 600 F4 IS lenses.
Some postings within the past month state that supertele IS shuts down
if mirror lockup is engaged. See for example:
http://www.poelking.de/englisch/ScharfeF.htm
Do you by chance have an observation?
Regards,
Plumviewer
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