Canon RF 70-200 mm f/4 L IS USM, released November 2020 for Canon EOS R-series mirrorless cameras [^0^].Optical design16 elements in 11 groups4 UD (ultra-low dispersion) elementsAir-Sphere Coating (ASC) and Super Spectra CoatingFluorine-coated front element for dust, water and smudge resistance [^2^].Focal length & coverage70–200 mm zoom, full-frame (34° – 12° diagonal).Works on APS-C bodies with equivalent 112–320 mm field of view.ApertureConstant f/4 wide open, electronically controlled 9-blade rounded diaphragm, stops down to f/32 [^4^].Focus & stabilisationDual Nano USM autofocus motor with full-time manual override (focus-ring rotation ≈ 320°)Focus-limiter switch: Full range or 2.5 m – ∞ onlyMinimum focus distance 0.6 m (≈ 2 ft) across the entire zoom rangeMaximum magnification 0.28× (1 : 3.6) [^6^]Optical Image Stabilizer rated 5 stops (up to 7.5 stops when combined with IBIS in R5/R6) [^8^].Physical specificationsDiameter: 83.5 mm (3.29″)Retracted length: 119 mm (4.69″)Extended length at 200 mm: ≈ 175 mm (6.9″)Weight: 695 g (24.5 oz) including caps and hood ≈ 770 g in-use [^9^]Filter thread: 77 mm (non-rotating front element)Lens hood: ET-83G (WIII) bayonet type, includedCase: LP1319 soft pouch includedDust- and moisture-resistant sealing on switches, rings and extending barrel, plus mount gasket [^11^].Other featuresProgrammable control ring at the lens frontZoom lock switch to prevent zoom creep during transportNot compatible with RF 1.4× or 2× extenders [^12^].ManufacturingLens made in Japan