James C Sheng 12:23am, 1 May 2012
Hi,

Has anyone seen this issue, the image in the view finder will jump slightly once it focuses ?

James
brev99 PRO 5 years ago
That is probably the vc locking on to the target. Turn the vc off and give that a try.
James C Sheng 5 years ago
Thanks that was it.
Carlisle2004 5 years ago
I own a tamron 70-300 ultrasonic silent drive SP Di. Sometimes the focus either will not focus or it jumps out of focus. I'm shooting with a sony a700. Any ideas? I have never had any focus problems with any of my sigma lens.
Thanks!
Carlisle
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