Tamron VC Frame Jumps

[madann]

Hi all,

I just got a Tamron 24-70 f/2.8 VC. I noticed that sometimes the frame jumps for about 1s when the image stabilizer engages after half pressing the shutter. If the behavior is present, I can't get sharp images hand holding the lens at low shutter speeds. Turning image stabilization off actually gives me better result. It doesn't always happen but sometimes this really screws up my pictures.

I haven't noticed this in any other image stabilized lense from Canon or Sigma that I have used before. Is this a defective lens or a common behavior of the Tamron VC system?

Cheers,
Markus

 

[Loswr]

The recently posted TDP review of the lens stated, "There is no viewfinder framing shift during stabilization startup and the image is very obviously stabilized in the viewfinder."

I'd return the lens if still possible, else send it to Tamron.

 

[ihendy]

When I purchased this lens I tried two in the store. One did the frame jump and the other did not. I took the one lens home without the frame jump. After about three weeks, the second copy started doing the exact same thing you describe. A little jump right at VC start up and the once sharp stabilized images were no longer as sharp. Fed up with the Quality control with tamron, I exchanged it for the canon mark II 24-70. I'm happier with the canon as its color rendition is closer to my other canon glass. The tamron had a bit more of a yellow cast right out of the camera to my eye. Nonetheless it was something I could definitely live with for a thousand bucks less if only the darn VC would work consistently

Send yours back. It should definitely not do that

 

[madann]

Thank you for the fast replies! I will return my lens.

Cheers,
Markus

 

[mosest]

I use this lens for 10 month and very happy with the result. look what i found on Tamron site.
"The phenomenon of the display shaking when VC starts and ends is a normal part of VC's operation and is therefore not abnormal.
The VC mechanism in lenses for Nikon and Canon cameras uses a shift method that moves part of the optical system parallel to the image plane. When the VC mechanism is switched off, the VC lens element that compensates for vibration is locked in the center of the optical system. When the VC switch is turned on and the camera's shutter button is pressed halfway down, the lock is released, allowing Vibration Compensation to start. When the shutter button is released and not pressed again for a set time period, the lens decides that shooting has ended and locks the VC lens to stop Vibration Compensation.This locking mechanism uses a lock/release method to control the rotations of the VC lens when the lock is turned on/off. The display in the viewfinder shakes when the lock is turned on/off, because the rotation axis of the drive mechanism (VC actuator) that turns the lock on/off is not necessarily the same as the optical axis of the VC lens. "
hope this will answer for your worry

Moshe