That's interesting but I don't think Canon got your memo. The
instructions for the Canon 70-200/2.8 IS lens say to turn off the IS
function when shooting in Bulb mode and, additionally, it might be
helpful to turn it off on a tripod under certain (unspecified)
conditions. Since my 5D will do a shutter speed of 30 seconds without
using bulb mode I conclude that all is well until 30 seconds. But on a
practical note 1/2 second is probably more reasonable since subject
motion will likely be a more serious problem pretty quickly after 1/2
second.
Anyhow, the reason I asked the question is that it has always been my
understanding that early Canon IS lenses wanted the IS turned off when
on a tripod but that that restriction had been lifted on later lenses.
The instructions for the 70-200/2.8 IS seem to bear that out. I was
expecting to hear that Olympus had done the same.
So I finally decided to go to the horses mouth and looked in the E-M5
user's manual. Its only comment on the subject is to turn the IS off if
the camera is on a tripod.
Chuck Norcutt
On 11/8/2012 6:36 PM, Ken Norton wrote:
>> Does the IS on the E-M5 need to be disabled when on a tripod or
>> partially disabled when using a monopod?
>
> Chuck, it's the same deal with all forms of electro-mechanical-optical
> image-stabilization. It addresses movement up to about a half second.
> Beyond that and you'll get both random movements and re-centering. So,
> as long as your shutter speed is faster than 1/2 second, having IS
> turned on will be a benefit. Beyond 1/2 second and you start getting
> blurring caused by the IS system.
>
> AG
>
>
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