Is this relevant now, the age of the autofocus ? I don't think the industry gives a **** about a perfect MANUAL focusing aid nowadays.
Anyway, you shoudn't drink Leffe, it's made by Interbrew and not a real abbey beer anymore. Chimay is the way to go. You can choose La Trappe or Duvel, too.
I have read this before and I am left with 2 questions:
Can A person have this installed in their camera?
Is it enough to overcome the effects of R*****l ?