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

[Peter J. Alling]

Just the Canon, and the Kodak semi twins, (c/n), are full frame as far 
as I can recall. 

Jens Bladt wrote:
I don't know the 1Ds. But, I believe 95% of all digies are less than full
frame.
Jens Bladt
mailto:[EMAIL PROTECTED]
http://hjem.get2net.dk/bladt
-----Oprindelig meddelelse-----
Fra: Cotty [mailto:[EMAIL PROTECTED]
Sendt: 17. januar 2005 12:48
Til: pentax list
Emne: Re: *istD AF performance (was Re: Sigma 2.8 Zoom lens comments)
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 ?

Cheers,
 Cotty
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