It's the same as 1/ (for all practical purposes). 1/2.8 would be more universally recognized, wouldn't it. Regards, Bob.... -------------------------------------------------------------------- "Beer is proof that God loves us and wants us to be happy!" - Benjamin Franklin From: "Steve Ross" <steveross.effigy@virgin.net> > Hi > > Could someone explain these certain numbers found > around the front elements of a lens: 1:2.8 or 1:3.5 etc. > I know the 2.8 and 3.5 is the lense speed? but whats > the 1:?
