Go Back   Steve's Digicams Forums >

LinkBack Thread Tools Search this Thread
Old Jul 24, 2005, 10:26 AM   #1
Junior Member
mookier's Avatar
Join Date: Jul 2005
Posts: 6

I have read a few places that when taking night shots on a tripod (like, say, fireworks), it is better to turn the image stabilization off. That doesn't seem logical to me, but I figure there must be a reason for it. My questions:

1.) Is it better to trun the IS off in such a case? If so, why?

2.) Has anybody "field tested" this by taking night tripod shots? If so, what do you find to be the differences in shot quality/clarity with the IS onvs. off, or is there no real difference?

mookier is offline   Reply With Quote
Sponsored Links
Old Jul 24, 2005, 4:46 PM   #2
wingnut1's Avatar
Join Date: May 2005
Posts: 45

It's generally accepted that leaving IS on using a podcan sometimesresult in images that look like camera shake. I suppose the IS might try to compensate for motion that isn't there with a tripod.
wingnut1 is offline   Reply With Quote
Old Jul 25, 2005, 4:45 AM   #3
Senior Member
Stevekin's Avatar
Join Date: Jun 2004
Posts: 1,611

wingnut1 is correct in saying that most anti-shake/image stabilized lenses, or bodies, will try to compensate for camera movement when it is, in fact, not evident.

Canon became aware of this phenomenon when users found degraded images when using IS on a tripod. They found,and I quote, "When there's not enough motion for the IS system to detect, the result can sometimes be a sort of electronic ‘feedback loop'. As a result, the IS lens group might move while the camera is on a tripod and all manufacturers recommend IS/AS be switched off when using a tripod.

Of course, camera shake could still be evident on a tripod if using the cheaper, light weight models. But then you would be just as well using the camera without the tripod and switching the IS/AS back on !!

Canon do, however, produce lenses with IS that can also detect that the camera is motionless. If the camera is being held steady, either by hand or on a tripod, the lenses can detect this and effectively switch the function off automatically and go into 'tripod mode', subsequently detecting and correcting for 'mirror slap' and shutter movement at slow shutter speeds.

The list of Canon lenses below is around one year old, so expect there to be more available.

EF 28–300mm f/3.5–5.6L IS USM
EF 70–200mm f/2.8L IS USM
EF 70–300mm f/4.5–5.6 DO IS USM
EF 300mm f/2.8L IS USM
EF 400mm f/2.8L IS USM
EF 400mm f/4 DO IS USM
EF 500mm f/4L IS USM
EF 600mm f/4L IS USM

For all other cameras/lenses, it is best to switch off IS/AS when using a tripod.


Stevekin is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 3:21 PM.