The Olympus 30mm F3.5 Macro impresses with its 1.25X (2.5X equivalent) magnification and minimum working distance of just 14mm. Of its 7 elements, one is aspherical, another is extra-low dispersion and a third is dual super aspheric. To combat the sluggish focus speeds normally found on macro lenses, Olympus made the 30mm's focusing element as light as possible, resulting in a 20-30% increase in speed over previous models. An underwater housing, focus gear and anti-reflective ring are optional extras.