Donald Gray wrote:
On Tue, 29 Nov 2005 22:14:28 GMT, Alan wrote:


The question: why does this lens have a switch 1.2 metres to infinity
or 3 metres to infinity.

Surely it is not in an effort to save focussing time?

I have the 70-200 2.8 is usm with that button and, as stated in the
manual, fasting focuing is exactly what it's for.


Hi Alan
Obviously with teh 'posh' version you get a manual - with my version,
all I got was a sheet that covered 7 lenses including the 70 - 210 but
not the 70-200!

The sheet does not cover the focussing limiter switch.

Is there any harm in leaving it permanantly on the 1.2 metre position?


Hi Donald, no, there is no harm in leaving it at the 1.2m-infiniy
setting,it's just that when you're shooting consistantly within the
further range you can pick up a bit of speed beacuse the camera doesn't
look for stuff close in.