Canon 300 f4 IS question

[mcdcwain]

Why using a bean bag or mono pod with the IS on, I notice the focus point moving slightly in the viewfinder. Is this usual for this lens.

I thought it only did this when supported by a tripod or other firm support, with IS enabled.

Regards

Mike

[defordphoto]

You will notice the image in the viewfinder move around a little bit. Especially if you're more steady. Your movements are less so you see the lens 'catching up' to your movements which you normally do not see when you're 100% handheld as you're moving more.

Did that make sense? ;)

[mcdcwain]

Yes that makes sense, thanks for that.

If I was using a bean bag would I be better switching the IS off.

I believe the IS will give you two extra stops when hand holding.
Would a bean bag on a solid platform improve on this with the IS off.

Regards

Mike


Mike