Tripod and IS.

[k_s_rajeev]

I remember reading some where int ehgroup that I am not supposed to used the IS when I am using a triop.

can some one explain me why?

Thank you.

[BearSummer]

Hi K_S_Rajeev,

Using IS on a tripod depends on which lens you have. With the first IS lenses you weren't supposed to use them on a tripod as the required a small amount of jiggle for them to work properly, without the jiggle they could behave unpredictably. The only way to be 100% sure is to read the documentation that comes with the lens, it will tell you if you can use it on a tripod or not. Or you could tell us which IS lens you are using and I am sure one of the helpful photogs on here would be able to clear it up for you.

Best regards

BearSummer

[Roger_Cavanagh]

BearSummer is right. It depends on the lens. For more info' see this article:

http://www.rogercavanagh.com/helpinfo/34_is.htm

Regards,

[k_s_rajeev]

Hi,

I am using 28-135 IS for 10D.

Thank you.

[hmhm]

I'd love to see an authoritative reference on this point.

I commonly see references to the "IS requires a little jiggle", but I don't know whether this is true, or just speculation that's become true through repetition (I tend to suspect the latter).

What seems very clear to me is that people often use tripods to support a camera for very long shutter speeds, and that IS should not be used for such shots, as it tends to jitter a bit on its own over long time-scales (i.e. IS isn't likely to remain perfectly still for a 3 second exposure).

My recollection is that the lenses that are okay to use on a tripod actually detect that they're mounted on a tripod (i.e. they detect a lack of jitter), and they turn their IS off, so that IS doesn't _cause_ blur. Of course, I don't know whether _this_ is true, or just speculation that's become true through repetition (I tend to suspect the former).
-harry

[phidong]

Its true. You're not supposed to use the lens with IS on on a tripod.

[Roger_Cavanagh]

The info in my article (link previously posted) is pukka - summarised from EOS Magazine. Some lenses can work out that they are on a tripod and do not need to have IS turned off. Other lenses will get stuck in a loop because they try to compensate for vibration that isn't there, but in windy conditions where there is tripod movement, IS can still help.

Regards,