AF lenses on AF 1.7X adapter
P. J. Alling
webster26 at mindspring.com
Mon May 5 13:19:28 EDT 2008
It does so have to, it just doesn't want to...
Mark Roberts wrote:
> Dario Bonazza wrote:
>> Hi all,
>> I've been asked this question, but couldn't answer it. What happens by
>> matching a DA* 300mm AF lens (or any other SDM lens) with the AF 1.7X
>> converter? Do both AF devices (the SDM one in the lens and the screwdriver
>> type in the adapter) start & try to autofocus?
> That couldn't happen because the 1.7xAF converter doesn't have to
> electrical contacts necessary for SDM focusing.
Vote for Cthulhu. Why settle for a lesser evil...
-- Dr. Jerry Pournelle
More information about the PDML