Sony DSLR-A300K/N Lenses and Accessories Selection Guide - Page 9
Sony G Lenses
UPC - 027242743991
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Sony® Lenses The large-aperture G Lens series brings together a wealth of advanced technology to provide you with an exceptionally refined level of optical performance. Its aspherical lens elements improve lens performance; ED (Extra-low Dispersion) glass minimizes the chromatic aberrations that occur at large apertures; and the circular aperture makes smooth, beautiful defocusing possible. The resulting difference in quality is clear to see... and clearly breathtaking. 16 Sony G Lenses SAL35F14G Aspherical lens 35mm F1.4 G • Lens groups/elements: 8/10 • Minimum focus: 11-13/16" (0.3 m) • Filter diameter: 55 mm • Size: (diameter x length): 2-3/4 x 3" (69 x 76 mm) • Weight: 1 lb 2 oz (510 g) Fast wide-angle lens with superior image quality at wide apertures thanks to glass-molded aspheric lens elements. Achieves high resolution and high contrast from corner to corner, with shallow depth of field also possible because of the large maximum aperture. This unique lens gives a special touch to portraits and landscapes, and is ideal for handheld shooting. For comfortable handling, includes a focus hold button and a focus ring that does not rotate during AF operation. SAL35F14G (35mm F1.4 G) Modulation Transfer Function (MTF) MTF is a measurement of how well a lens can reproduce fine details at a high level of contrast. The curves below show lens performance at two levels of spatial frequency (10 or 30 line pairs/mm) for two types of targets (radial R, tangential T). Performance is measured at two settings: open and F8. For each condition, contrast level changes at various points away from the center of the image. MTF 100 80 60 40 20 Contrast (%) 0 4 8 12 16 20 Distance from center of image (mm) Open R10 line pairs/mm T10 line pairs/mm R30 line pairs/mm T30 line pairs/mm F8 R10 line pairs/mm T10 line pairs/mm R30 line pairs/mm T30 line pairs/mm (R: radial target, T: tangential target) Icons: Circular aperture Internal focusing Focus Hold Button Focus Range limiter ADI flash metering SSM (Super sonic wave motor) • For details, please refer to the Lens Technology section on p.26-28. 17