05-30-2013, 09:03 PM
Quote: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.
Quote: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.
Quote: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.
Quote: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.
Quote:It does.
Also good news.
Cheers
Sapkas