The need to manually set SR

[Godfrey DiGiorgi]

On Feb 1, 2007, at 10:26 AM, Kenneth Waller wrote:

> But I wonder if, for example a 300mm lens with a 1.4 converter,  
> should have
> the SR set for a 300mm lens or 420mm (1.4 X 300) lens ?

If you fit a teleconverter behind a lens, the proper setting for the  
shake reduction should be the combination of lens and teleconverter  
focal length. So, for instance, a 300mm lens plus a 2x teleconverter  
constitutes a 600mm lens, and that's what the SR should ideally be  
set to work for.

Godfrey