This is a Canon lens that has a maximum focal length of 400 mm and a minimum focusing distance of 0.88 m. The aperture on the lens ranges from ƒ/32-45 to ƒ/5.6-8.
From Camix
Canon RF 100-400mm f5.6-8 IS USM Lens [Brand New]
HDEW Cameras
Canon RF 100-400mm F5.6-8 IS USM
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