DoubleGaussian function

This lens features Movie and Still Compatible (MSC) autofocus with an inner focus system, which provides fast focusing for stills work and runs smooth and quiet, important when shooting video. The lens barrel has a 'Snapshot' ring which pulls back for manual focus control. Distance and depth-of-field scales for manual control are easily viewable on the lens barrel when the Snapshot ring is pulled back. Three aspherical elements, including a Dual Super Aspherical element to correct aberrations, as well as a High Refractive index element to correct high spherical aberrations, provide quality imaging and ZERO (ZUIKO Extra-low Reflection Optical Coating) lens coatings are applied to the elements to reduce lens flare and ghost images.

Sonnar vsdouble Gauss

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Doublegaussian lens

The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

Walter Mandler (1922-2005) designed many double Gauss lenses for Leica cameras. We review; form and aberration balance for his most renowned lenses. Designs are re-evaluated using modern optimisation routines with special attention to glass replacement.

The 17mm f/1.8 M.ZUIKO Wide-Angle Lens for Micro Four Thirds Mount from Olympus is an all-metal 17mm prime lens designed for the Olympus line of micro four thirds cameras such as the E-PM2 and E-PL5 digital cameras. Its focal length is equivalent to 34mm in the 35mm format and its minimum focusing distance is 9.8" (25 cm). It is a very bright, fast lens ideal for everyday photography as well as street photography in which fast shutter speeds and sufficient light is important. Of course, with a wide maximum aperture of f/1.8, this is a fine lens for low-light photography and hand-held portraiture.