From: Eric Weir
On Dec 2, 2010, at 8:06 PM, John Sessoms wrote:
The only advantage is it will work with the manual focus lenses
you have now and will work with AF lenses in the future without
having to buy another converter. It just has the contacts the AF
lenses will need if you ever do decide to try Auto-focus, but
doesn't require you to use Auto-focus lenses.
The other thing it has that you may need is the contacts for 'A'
lenses.
So the "A" in "A2X-S" has nothing to do with the "A" as in an "A"
lens? And A lenses will be essentially M lenses when used with this
convertor?
I have no idea. I was referring to the Kenko AF converter someone else
recommended. I posted before I saw the later comments regarding the
"A2X-S" converter.
The Kenko AF converter would not require you to have auto-focus lenses,
but the capability would be there for the future if you ever wanted it.
You wouldn't have to buy another converter to add auto-focus.
In the meantime, the Kenko converter should be backward compatible with
the 'A' and 'M' lenses in addition to having the contacts necessary to
use it with auto-focus lenses.
Just as a guess, I would suspect the 'A' in "A2X-S" indicates the
converter has the contacts necessary for 'A' lenses to function *as* 'A'
lenses when used with the converter, and that 'M' lenses will function
as 'M' lenses when used with it.
But since, there's no 'F' in the nomenclature, it probably doesn't
support auto-focus.
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