Hi Collin: mine is the RMC version, and it is of course manual focus and
manual aperture only, but works perfectly on everything I've tried from an
ME up to the *ist-D. As I said, I have found the glass good enough, having
used it mainly at f5.6-8: you may recall my PUG shot "Butterfly Dance" was
shot with it, and the displayed image is a fairly heavily cropped one,
looking at that photo may allow others to judge it's quality.
John Coyle
Brisbane, Australia
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <pentax-discuss@pdml.net>
Sent: Tuesday, April 18, 2006 10:29 PM
Subject: Tokina 400/5.6 variations (Re: long lens for birds?)
I've seen 3 varieties of this lens.
The oldest of them is the RMC.
Then came the SD
Finally came AF and improved optics in the AT-X SD.
Here's some general observations:
The old RMC may be limited to the K/M mount.
The SD can have "A", or not, but also has a Ricoh pin.
Fortunately Tokina had the foresight to make it a "bump" so that
it won't interfere with Pentax' AF coupling.
The AT-X SD is where auto-focus comes in. I've seen no manual
focus AT-X SD in the 400/5.6. (Someone correct me if that
observation is in error.)
The SD and AT-X SD are Very Good optically.
The RMC is much cheaper and OK optically.
Not bad, like old Soligor.
But imo it's worth the extra few bucks to get the SD.
Collin
KC8TKA
