High-performance standard zoom lens that features for the first time the SWD (Supersonic Wave Drive) autofocusing system and covers a zoom range equivalent to 24 to 120 mm on a 35 mm camera lens. Special optical glass elements are used to correct various types of aberrations, while the digital-dedicated design ensures high-definition performance with clear, crisp images from edge to edge. This lens also boasts impressive close-up shooting capability, allowing users to shoot from as close as 25 cm throughout the zoom range.
Autofocusing is powered by Olympuss breakthrough SWD. Developed as the worlds fastest AF system, this extraordinary autofocusing drive provides both high speed and high precision while operating with lower noise than ever.
This is the magnifying factor of a lens. Macro lenses will often be described by their “magnification factor”. A lens with a 1:1 magnification factor produces a projected image on the sensor which is the same as the subject.
14 Elements in 10 Groups. Super ED Lens, 2 ED lenses, Aspherical ED lens and 2 Aspherical lenses
Elements / Groups:
The individual pieces of glass that form the overall optical construction. Most lenses have between four and eleven elements to bend the light rays to ensure a perfectly formed image appears on the light sensitive surface, such as a film or CCD. The elements are arranged in groups and may be seen in specification sheets as, for example, 6 elements in 4 groups. That configuration may have two single elements and the other four grouped in pairs.
A lens with a 1:1 magnification factor produces a projected image on the sensor which is the same as the subject. A 1:1 magnification factor is usually considered the minimum for a lens to be described as a “macro” lens. Specialist macro lenses are often 1:3 or even 1:10 magnification factors, meaning that 1mm across the subject becomes 3mm or 10mm when projected onto the sensor, thus 3 or 10 times magnification.