5d Mark II and IS Lenses

[wazy15]

A quick question, does Canon bodies notice when an IS lens is attached and automatically alter shutter speeds by 3 stops to take advantage of it or does it not? If not I assume I need to play with manual mode.

 

[squishy]

Altering the shutter speed by three stops would screw the exposure for no reason.
IS is there purely to cancel out some of the camera shake that becomes visible at slower shutter speeds, which means in some situations you can lower the ISO sensitivity for a cleaner image.
It does not mean you can (or have to) always shoot 3 stops slower than with a non-IS lens. For moving subjects, you still need a shutter speed fast enough to freeze motion, which in lower light will mean upping the ISO regardless of whether you have IS or not.

Don't worry about messing around with manual mode because you have to make use of IS, just keep in mind that it will allow you to lower the ISO (or use a smaller aperture) in some situations

 

[arad85]

A quick question, does Canon bodies notice when an IS lens is attached and automatically alter shutter speeds by 3 stops to take advantage of it or does it not?

Not.

But if you had a Canon camera with IS lens, you could have experimented yourself

 

[Dr_O]

Question seemed familiar

Now, why can't I remember anniversaries instead of remembering all sorts of bizarre things:bang:

 

[Hodders]

I would doubt if in P mode the camera would change the shutter speed as IS does not stop things moving !

Mind you it has been years since I shot anything in P mode....

 

[ohara]

IS doesn't alter shutter speed. It uses mechanical stabilisation inside the lens to cancel out small movements. If you have any lens with IS then turn it on, hold the camera steady and look through the viewfinder. Make some very slight movements with the camera and you should be able to see, hear and feel the IS in operation as it 'shifts' the image to compensate.