Re: *istD AF performance (was Re: Sigma 2.8 Zoom lens comments)

[Peter J. Alling]

Oooh, good one!
Mark Roberts wrote:
Cotty <[EMAIL PROTECTED]> wrote:
 

On 17/1/05, Cotty, discombobulated, unleashed:
   

T answer his question: Yes, there's is a difference. Due to the grater
enlargement (crop factor) the shutter speed necessary to "freeze" movent
must be divided by the crop factor: If i.e. a 250mm is used:  1/250 divided
by i.e. 1.5 = 1/375 sec.
90% out of focus! That bad!
       

I mean for crying out loud, it's a 1Ds - there *is no crop factor*
involved - it's a full frame camera. What planet do these people come from ?
   

Well cut the fellow a little slack, Cotty. Perhaps he just isn't too
bright. After all, he *is* a Canon user. ;-)
 


--
I can understand why mankind hasn't given up war. 
During a war you get to drive tanks through the sides of buildings 
and shoot foreigners - two things that are usually frowned on during peacetime.
	--P.J. O'Rourke