It is reported that Canon will release three new RF system lenses this year.

CTOnews.com October 15 news, Canon this week released RF 10- 20mm f / 4L IS STM ultra-wide angle zoom lens, is expected to go on sale in late October.

According to Canon Rumors, Canon will also launch more RF lenses this year, including an RF L red circle lens and two RF-S lenses, but detailed specifications have not yet been announced, and more news is expected next month.

CTOnews.com Here is a review of Canon's RF 10-20mm f / 4L IS STM ultra wide-angle zoom lens. This lens supports 5-level anti-shake, uses a circular aperture of 9 blades, and the maximum aperture is constant F4. The closest focusing distance is about 25 cm. When used with APS-C frame model, it is equivalent to 16-32mm focal angle. It is the classic focal length of wide-angle zoom lens.

The lens adopts 12 sets of 16 optical structures, including 1 UD aspherical lens, 2 UD lenses, 2 aspherical lenses and 1 super UD lens. SWC sub-wavelength structure coating (2 surfaces) and ASC coating (2 surfaces) are adopted to effectively suppress glare and ghost that are easy to appear in wide-angle lenses.