11/29/2010

Sony 75-300mm f/4.5-5.6 Compact Super Telephoto Zoom Lens for Sony Alpha Digital SLR Camera Review

Sony 75-300mm f/4.5-5.6 Compact Super Telephoto Zoom Lens for Sony Alpha Digital SLR Camera
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According to a photo magazine, this is a cosmetically re-labelled Konica Minolta 75-300 (D) zoom telephoto, which is a lens that I own (it certainly looks exactly the same as the KM 75-300 lens, but with the 'Sony' name).In which case, I have the following review:
(1)Excellent construction quality, this is a very nicely made lens, excellent finish, not too heavy but solid and without the 'plastic' feel of many medium-priced lenses;
(2)Excellent optical quality, with good sharpness even at the longest 300mm focal length where most zooms begin to show poor quality;
(3)VERY UNUSUAL:near-zero distortion throughout the entire range of focal lengths (very different from some Sigma zooms that I own, which have conspicuously visible pincushion distortion).This may well be the lowest-distortion 75-300 telephoto from any maker.
(4)ONE CAVEAT:AUTOFOCUS IN LOW LIGHT: on my Minolta Maxxum 7 film camera, whose autofocus system is apparently quite similar to the Sony Alpha 100, the camera has difficulty autofocussing the 75-300 lens at the 300 mm setting (where the aperture is only f/5.6) in light weaker than direct sunlight.This is probably the same with any f/5.6 or slower lens.I have found myself switching to manual focus at the 300 mm setting if the subject is not brightly lit.
NOTE:the Konica Minolta 75-300 (D) lens is still available, for about $140, and reportedly will work with Sony Alpha cameras just as well as the similar lens labelled Sony.

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Product Description:
Get extremely close to your subjects from a relaxing distance with this Sony 75-300mm super telephoto zoom lens. Great for taking incredibly close-up portraits without making your subject nervous, the compact, lightweight 4x zoom lens is a terrific value and an ideal choice for covering outdoor activities and sports action, even in large stadium locations. The lens offers a wide zoom range of 112.5 to 450mm (35mm equivalent) that handles both middle-ground subjects and portraits from afar, while still capturing intimate details and natural wonders close at hand. In addition, the lens gives light sources a pleasing circular defocused effect in the background, making the subject stand out beautifully.

    Focal length: 75-300mm (112.5-450mm 35mm equivalent)
    Maximum aperture: f/4.5-5.6
    Minimum aperture: f/28-32
    Filter diameter: 55mm
    Minimum focus distance: 4 feet, 11 inches
    Magnification: 0.25x
    Lens group elements: 10 groups 13 elements
    Distance encoder: Yes
    Blades: 7 aperture blades
    Asperhic elements: No
    Lens type: Telephoto zoom
    Dimensions: 2.81 inches in diameter and 4.81 inches long
    Weight: 1 pound, 2 ounces


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