Sony SLT-A77VM 2011 α Lens and Lens Accessory Brochure and Specifica - Page 16

Contrast (%) Contrast (%) Ultra wide angle 20mm F2.8 SAL20F28 M mode, 1/125 sec., F11, ISO 200, Landscape Creative Style; Photo: Yuji Nukui Wide 94° angle of view on full-frame cameras Precisely corrected for natural perspective Aberration effectively suppressed throughout the focus range Rear-focusing mechanism for fast autofocus response Circular aperture for attractive defocusing At 20 mm 100 80 60 40 20 0 3 6 9 12 20 Distance from optical center of lens (mm) Spatial frequency Max. aperture R T 10 line pairs/mm F8 aperture R T 30 line pairs/mm R: Radial values T: Tangential values This rigorously corrected lens gives you a wide angle of view for images that benefit from dramatic perspective with minimum distortion. It's an ideal choice for covering spread-out scenes that you can't get far enough way from to cover with a "normal" lens. But there's more: since it has extended depth of field that can keep everything from 25 centimeters to infinity in crisp focus, you can create exaggerated perspective by including very close and very distant objects in the frame. Close objects will loom large, while distant objects appear to recede markedly into the distance. Meticulous attention has been paid to minimizing flare and internal reflections in this advanced design, with the result that excellent sharpness and contrast are maintained through the image. • Weight (approx): 285 g • Dimensions (Dia. x L): 78 x 53.5 mm • Max. magnification ratio: 0.13x 30 Wide angle 28mm F2.8 SAL28F28 M mode, 1/125 sec., F11, ISO 200, Landscape Creative Style; Photo: Yuji Nukui Excellent contrast and resolution Compact, lightweight design Built-in slide-out lens hood An outstanding choice for 35mm full-frame and APS-C format cameras At 28 mm 100 80 60 40 20 0 3 6 9 12 20 Distance from optical center of lens (mm) Spatial frequency Max. aperture R T 10 line pairs/mm F8 aperture R T 30 line pairs/mm R: Radial values T: Tangential values 28 millimeters is an extremely versatile focal length that can be useful in a wide variety of situations on both full frame and APS-C format cameras. On a 35mm full frame format camera, 28mm is wide enough to allow comfortable shooting indoors or on the street without producing forced perspective. On an APS-C format camera 28mm is equivalent to a focal length of 42mm, which is close to "normal" in terms of angle-of-view and perspective. For photo enthusiasts who use either or both types of bodies, this lens is a must-have! It's compact and lightweight, and is a versatile, convenient choice for use either as a main or second lens. • Weight (approx): 185 g • Dimensions (Dia. x L): 65.5 x 42.5 mm • Max. magnification ratio: 0.13x 31