On 3 Jan 2006 at 21:00, Adam Maas wrote:

> The Minolta's seem to be able to do it even with lenses mounted via adaptor.

If Pentax are simply using in camera gyros (I expect that this isn't correct, 
they would more likely be accelerometers) then they must have to know the 
lenses FL to determine the mechanical offset to apply to the sensor to offset 
the shake. Consider the difference on the film plane that a similar amplitude 
body shake will produce at the sensor if I have my A300/2.8 and 2x TC or my 
A15/3.5 mounted?

How the Minolta works or how effective it is I have no idea, but you can be 
very sure that the Pentax system as used in the A10 if adopted for DSLR use 
needs FL, the copy on DPReview even states it (though not very elegantly):

"(1) Two internal gyro sensors detect the amount of camera shake.
(2) A dedicated CPU quickly calculates the necessary correction from the amount 
of camera shake and the lens´s focusing data."


Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT)  +10 Hours
[EMAIL PROTECTED]
http://members.ozemail.com.au/~distudio/publications/
Pentax user since 1986, PDMLer since 1998


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