On Mon, 28 Mar 2016 18:01:32 -0000 (UTC), "George Anthony"
wrote:
Having problems obtaining focus. Any hints?
You could tell us more, like what kind of camera you are using and
whether or not you are using tele-extenders.
In the mean time I note from
http://www.dpreview.com/reviews/tamron-150-600-5-6p3
"... he lens has a decidedly slow maximum aperture, starting at F5 and
dropping to F6.3 at full telephoto". This could have something to do
with your problem.
--
Regards,
Eric Stevens