Introduction As with the firm’s 75mm and 12 mm primes, this new high-speed 17mm f1.8 (35mm equivalent) for MFT cameras features a sturdy metal outer and a promising sounding high-grade optical design. Although weighing just 120g, it has 9 elements in 6 groups with one double-sided aspherical lens, one Super HR (high refractive index) element and two further elements with aspherical surfaces. Minimum focus distance is a fairly-typical 0.25m, but as well as a high-speed AF motor, the lens offers what the firm calls a ‘snapshot focus mechanism’ – a push/pull manual focus collar with a
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