Originally posted by: Zenmervolt
Originally posted by: 6000SUX
You are befuddled. I never said the lens wasn't fast-- I said it wasn't fast in actual use, unless you manually focus. Breaking it down as I would for a small child, this means that you cannot properly take advantage of the maximum aperture unless you manually focus.
You also went off track in other ways, for instance with statements such as "A lens doesn't fail at AF for the sheer reason of being f/1.8". Well, who the hell ever said that? You need to learn a little more courtesy, and a little more about discussion. It seems you also need to learn a little more about photography, if you haven't learned by now that AF can let you get many shots you'd otherwise miss.
I never said "A lens doesn't fail at AF for the sheer reason of being f/1.8". Look at the quotes.
As far as courtesy, I see no instance where I stepped over the line. If you have a problem with my direct style of speaking, perhaps you'll feel better if you throw your purse at me.
As far as AF, I've never missed a shot when shooting manual focus because of focusing issues. (I've missed shots because I had my telephoto lens and needed my wide or vice versa, but I've never once missed a shot because of focus).
I know exactly what you're saying. That the AF at f1.8 renders f1.8 useless in practice. That doesn't change the fact that the f1.8 setting still passes light to the film. Just because
you personally can't manage to use the lens at that aperture doesn't mean that the lens is useless at that aperture. You seem to completely miss the fact that all a lens has to do to be "fast" is to offer a large aperture. The usefulness of a lens at wide aperture has nothing at all to do with whether it is or is not fast.
ZV