[USED] Canon 17-40 f/4 L USM

6,500 ฿

Key Specifications and Features

Aperture Range: Constant f/4 through the entire zoom range, beneficial for consistent exposure in video.
Autofocus: Powered by a Ring-type Ultrasonic Motor (USM) for fast, quiet, and accurate autofocus performance with full-time manual focus override.
Optical Construction: Includes 12 elements in 9 groups, incorporating one Super UD (ultra-low dispersion) element and three aspherical elements to minimize aberrations and ensure high contrast and resolution.
Build Quality: L-series durability with sealing against dust and moisture, although a UV filter is required to fully complete the weather sealing.
Weight and Dimensions: Weighs approximately 500g and measures 83.5 x 96.8mm.
Filter Size: Uses 77mm filters, which do not rotate during focus, making it ideal for polarizer users.