[sbogar]

I'm not sure about the relevance of this one ?

 

 

In theory water/dust could/creep into the lens body via the unsealed focus ring, yes. I would take a while though.

 

 

Make it 1mm. 

 

That is huge!

OK, I will measure this on a rented lens in about a week, and will report.

 

Whether it is consistent - hard to tell. It is about the same on the ZA 16-80 (which I still own).

 

That is very useful info.

 

Vignetting is a radial effect. The gradient depends on the focal length and format.

 

I am curious about the f/1.8 setup, and 28mm from the optical axis.

 

The focus ring is decoupled from the AF gear so it does not rotate in AF mode.

 

That is good news (and expected). Thanks for confirming.

 

 

It does.

 

Also good news.

 

Cheers

Sapkas