OK, someone needs to explain to me. If the tripod is doing its job, what
earthly use would be IS? We have already by now got most of the internet
idiots to understand the difference between camera and subject motion.
Bill Pearce
-----Original Message-----
From: Chuck Norcutt
Sent: Thursday, November 08, 2012 6:57 PM
To: Olympus Camera Discussion
Subject: Re: [OM] E-M5 question
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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