[Klaus]

Hi all, Hi Photozone team,

I have the Tamron AF 17-50mm f/2.8 SP XR Di II LD Aspherical [IF] VC (Canon) on my EOS1000D.

 

By chance, I noticed that under good lighting conditions (e.g. daylight/outside) the lens produces much sharper images when VC is switched off, compared to VC being switched on. I'm talking a decent level of sharpness being added once VC is off, as if a thin layer of unsharpness has been removed.

 

Under not so good lighting conditions (e.g. indoor lighting, candle light), the VC of course is a huge benefit and images produced at slow speeds are much sharper than without VC.

 

Photozone team, have you observed this behaviour under good lighting conditions with VC on/off before in any of your Tamron tests? Have you ever tested Tamrons with VC enabled/disabled during your tests? When you tests lenses, do you usually have VC/IS/OS enabled or disabled?

 

Anyone else experienced this?

 

Cheers,

Alex

 

Well, I don't know what degree you are talking about here but yes, technically images taken from a tripod or at high shutter speeds will be sharper than an IS image.