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Product Description
The CANON LENS RF 50MM 1.8STM is a compact and lightweight prime lens designed for Canon RF-mount mirrorless cameras. With its bright f/1.8 aperture, this lens offers excellent performance in low-light conditions and delivers beautiful background blur for portrait, street, and everyday photography.
Engineered with a precision-molded aspherical element, it ensures high image quality with reduced aberrations. The STM (Stepping Motor) provides fast, smooth, and quiet autofocus, making it ideal for both stills and video content creation.
Despite its small size and affordable price point, the CANON LENS RF 50MM 1.8STM packs premium features like Canons Super Spectra Coating for reduced flare and ghosting, a customizable control ring for intuitive adjustments, and a close focusing distance of just 0.30m.
Whether you’re a beginner looking to upgrade or a professional needing a portable, high-performance lens, this “nifty fifty” offers incredible value with sharp optics and versatile performance.
Specifications
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Focal length: 50 mm
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Max aperture: f/1.8
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Minimum focus distance: 0.30 m (¼× magnification)
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Optical construction: 6 elements in 5 groups, including 1 aspherical element
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Aperture blades: 7‑blade circular diaphragm
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Focus motor: STM stepping motor — smooth, near‑silent AF for stills & video
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Filter size: 43 mm
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Size / Weight: ~69 × 40 mm, ~160 g
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Coatings: Super Spectra to reduce flare/ghosting, accurate color
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Mount compatibility: Canon RF mount (works on full-frame & APS-C RF bodies)
Frequently Asked Questions
Yes — sharpness is very good at f/1.8 in the center and excellent from f/2.8 to f/5.6; edge sharpness improves significantly stopped down
Autofocus uses a gear‑type STM motor which is noticeable during long focus moves, but still quite quiet and fine for video or static shooting
Some CA (green/purple fringing) and vignetting occur at f/1.8, but these reduce by f/2.8 and disappear by f/5.6; it's manageable in post‑processing
No optical or in‑lens stabilization — rely on in‑body IS if your EOS R camera supports it .
Focus ring doubles as control ring; switching between focus and custom control requires toggling a switch plus camera menu adjustments, which some users find cumbersome
