Vibration with 35 mm adapters

[swiperstopswiping]

What is the advantage of having a vibration option on a 35 mm adapter?

 

[MiniMan]

Less grain, I think.

 

[swiperstopswiping]

Less grain? Weird. I wonder how that works out.

 

[setarcos]

when you watch a movie and you see a helicopter's blades or a car's wheels spinning, you don't see the blade or the wheel's details, you see a "motion blur".
Same thing. Shoot on of these if need be, you'll get it.

 

[cheezweezl]

the grain comes from the ground glass which has a slightly rough surface. the idea is that if you spin or vibrate the glass, the grain will not show up.