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Why we recommend this ▼
The built-in 1.25x teleconverter delivers an effective 375-1000mm full-frame equivalent reach without swapping optics, paired with 8-stop 5-Axis Sync IS for handheld shooting. Its IP53-rated weather sealing and constant f/4.5 aperture across the zoom range provide reliable performance in harsh field conditions. This lens is best for wildlife photographers who need extreme telephoto flexibility and rugged durability in a single, sealed package.