View Full Version : c-4000 teleconverter help needed

12-30-2004, 11:10 AM
I have a c-4000 on which I want to increase the zoom and have a couple of basic questions.

My understanding (which is limited) is that what's available are teleconverters as opposed to a zoom. That is, you can increase the magnification by a specific factor (e.g., 2x or 5x) but not over a range (e.g. 150-300 mm equivalent). Also, most of the lenses I've seen advertized state that serious vignetting can occur if the internal lens is not a full zoom. So, if using a 5x lens for example, you can shoot at up to 3x (without the teleconverter) or 15x (with the teleconverter and the internal lens at max zoom), but not really anything in-between. Is this correct?

Also, I'm having trouble finding a site that reviews and compares different lens manufacturers and lenses (e.g., tiffen vs kenko vs sunpak vs olympus). Does anyone know of such a site?

thanks a lot and happy new year,