This is a SIGMA lens that has a maximum focal length of 18 mm and a minimum focusing distance of 0.11 m. The aperture on the lens ranges from ƒ/22 to ƒ/2.8.
From JESSOPS
Sigma 10-18mm F2.8 DC DN C Lens - Canon RF
SmartTeck
Sigma 10-18mm f/2.8 DC DN C Lens - Canon RF Mount -
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