Firmware Notice: RF100-500mm F4.5-7.1 L IS USM: Firmware Version 1.0.9
Firmware Version 1.0.9 incorporates the following fix and enhancement:
1. Adds a digital full-time manual focus function (a function that enables constant manual focus adjustment in both One-shot AF and Servo AF).
2．Improves a phenomenon in which the background is not blurred when performing slow panning with the IS (Image Stabilization) mode set to Mode 2 or Mode 3.
Firmware Version 1.0.9 is for lenses with firmware up to Version 1.0.7 If the lens' firmware is already Version 1.0.9, it is not necessary to update the firmware.
This information is for residents of the United States and its five territories only. If you do not reside in the USA or its five territories, please contact the Canon Customer Support Center in your region.
Customer Support Operations
Canon U.S.A., Inc.
Contact Information for Inquiries
Canon Customer Support Center
Phone: 1-800-OK-CANON / 1-800-652-2666