you must have the quick release to adjust the balance point as you add and
subtract equipment such as flash, flash concentrator, and tele-extender.
yes, 600mm isn't adequate for a lot more than you think. if you are going
after small birds, you really want a 1.4X extender on it a lot of the time.
Pentax doesn't make a decent AF one, so you have to try another brand,
although the 1.7X AF might work, albeit slowly and not very reliably.
Herb....
----- Original Message -----
From: "Joseph Tainter" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, November 02, 2005 12:00 PM
Subject: Tripod Head for Big Bertha
Will this do the job? The other two models that B&H lists seem only to
have quick release, which this model lacks. Is there any reason to want
quick release on a lens like this?