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Thread: Sigma 28-70mm F2.8-4 DG lens

  1. #1
    Join Date
    May 2009
    Posts
    37

    Sigma 28-70mm F2.8-4 DG lens

    This standard zoom lens has a large aperture of F2.8 at 28mm focal length and yet it is compact and lightweight, with an overall length of 62.5mm (2.5») and weight of 255g. (9oz.). This digitally optimized diagonal fisheye lens is equipped with a new multi-layer coating technology that reduces both flare and ghosting. This compact, large aperture zoom lens is ideal for digital and 35mm SLR cameras.

    • Lens Construction11 Elements in 8 Groups
    • Angle of View 75.4 - 34.3 degrees
    • Number of Diaphragm Blades 8 Blades
    • Minimum Aperture F22
    • Minimum Focusing Distance 50cm / 19.7 in.
    • Maximum Magnification 1:6.5
    • Filter Size Diameter 58mm
    • Dimensions Diameter 67.5mm X Length 60.0mm
    • 2.7 in. x 2.4 in.
    • Weight 245g / 8.6 oz.
    • Corresponding AF Mounts SIGMA- CANON, NIKON (D), PENTAX, SONY/MINOLTA (D)



  2. #2
    Join Date
    May 2009
    Posts
    37

    Re: Sigma 28-70mm F2.8-4 DG lens

    New coating reduces Ghost and Flare

    The new multi layer lens coating and lens design reduce flare and ghost, which is a common problem with digital cameras and also creates an optimum color balance.

    Compact and lightweight lens design


    This standard zoom lens has a large aperture of F2.8 at 28mm focal length and yet it is compact and lightweight, with an overall length of 62.5mm (2.5») and weight of 255g. (9oz.). Ideally suited for traveling, landscape photography and general photography. The supplied zoom hood can be used to obtain a superior light-blocking effect.

  3. #3
    Join Date
    May 2009
    Posts
    37

    Re: Sigma 28-70mm F2.8-4 DG lens

    Minimum focusing distance of 50cm (19.7 inches) throughout the entire zoom range. From 28mm wide to 70mm tele range this zoom lens has 50cm (19.7inches) minimum focusing distance. It has also maximum magnification of 1:6.5.

    Aspherical Lens : An aspherical lens element is used for excellent correction of distortion. A zoom hood is supplied with this lens for complete depth in the telephoto range and glare-free shooting in the wide-angle range.

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