I have a Sigma 100-300 zoom that tops out at 6.3 at the 300 end and it AF's fineas long as the light is pretty good, and you don't want to beusing this thing if it isn't.
Steven Desjardins Department of Chemistry Washington and Lee University Lexington, VA 24450 (540) 458-8873 FAX: (540) 458-8878 [EMAIL PROTECTED]
