On Wed, Sep 07, 2005 at 09:32:39AM -0400, Tom Reese wrote: > > have you ever used this Teleconverter? > > Have you some comments? > > In my experience, it doesn't work well with long lenses because it has a > limited focusing range. The instructions are to set the lens at infinity > then allow the teleconverter to do the focusing. With telephoto lenses, this > only works when the subject is at or near infinity. When the subject is > closer, the lens has to be focused closer too. The teleconverter will then > fine tune the focusing. > > Tom Reese
It's rare that you can't rough-focus the lens to the approximate distance and just leave it there for the TC to, as Tom says, fine tune the focus. I used to use mine on film bodies with the 300/2.8 - a great combination. Unfortunately on the *ist-D the comparable pairing of the TC + 200/2.8 shows rather more chromatic aberration than I would like. The biggest drawback I found is that you only get to use the central AF sensor when using the AF adapter. This may, or may not, matter to you.
