The lens is compatible with both the Canon Extender 1.4x and the Canon Extender 2x. Canon EF 70-200mm ƒ/2.8L IS II USM Addtionally I can add the Extender 2x II to enhance my daylightLike the rest of the Canon Super Telephoto lenses, the 600 IS L is compatible with the Canon EF Extenders. Image quality with the Canon EF 1.4x Extender mounted is reasonable - especially for an 800mm f/5.6 IS lens. As always, this extender adds CA (Chromatic Aberration), adds barrel distortion, reduces contrast/sharpness and slows autofocus.
Canon EOS R, 1.6x APS-C crop, EF Control Ring Adapter, Extender EF 1.4x II, Extender EF 2x II and Sigma 60-600mm set to 600mm, giving an effective 1,680mm focal length, 1/30 at ISO 1,600 at full aperture. bigger. Used with teleconvertters the combination can be so long that I can photograph local airplanes in the sky and read their tail numbers.
L461I.