Focal length is used to determine your lens's angle ... Lenses with fixed focal lengths are known as prime lenses and lenses ...

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Find out more about how we test and review products. Type: Prime lens Focal length: 15mm (30mm equivalent) Maximum aperture: f/1.7 Lens mount: Micro Four Thirds Weight: 4.06 oz / 115 g Dimensions ...

Sigma has launched two fast-aperture prime lenses for Canon mirrorless ... and are the first wide-aperture primes; the 16mm lens has an equivalent 24mm focal length, while the 23mm lens has ...