Sigma Lens problem

[horse.collier]

I have a problem which seems to affect one lens. The lens in question is a sigma 105mm f2.8. When on OS 1 or 2 there is jump slightly when i press the button to take the picture. As if the mirror is jumping. It only does this on the first pressure to focus, even though I use back button focusing. It doesn't happen on manual stabilisation nor on any other lens. Camera is Nikon D5200

 

[twist]

I have a problem which seems to affect one lens. The lens in question is a sigma 105mm f2.8. When on OS 1 or 2 there is jump slightly when i press the button to take the picture. As if the mirror is jumping. It only does this on the first pressure to focus, even though I use back button focusing. It doesn't happen on manual stabilisation nor on any other lens. Camera is Nikon D5200

Its probably just the stabilisation engaging.

 

[horse.collier]

Is this a common action then and nothing to worry about?

 

[toohuge]

Is this a common action then and nothing to worry about?

Yes - most VR lenses do this

 

[addicknchips]

Is this a common action then and nothing to worry about?

the OS in this lens is quite loud when it kicks in. its probably just that.

 

[TCR4x4]

Yep had the same on mine, perfectly normal.

 

[horse.collier]

Thank you very much all. Saved a few bob.