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Camera lens function and how to distinguish

Camera lens function and how to distinguish

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The lens not only covers the user will be frequently used in the focal lengths, and maintain a 455 grams of lightweight mirror, and the optimized AF auto focus control can bring fast autofocus, is a capture, including, suitable for travel use of the lens
18-135 with high zoom ratio of 7.5 times the high magnification standard zoom lens, the focal length conversion of 35mm specifications can cover 29-216mm focal lengths, optimized lens position and coating can effectively inhibit the ghost and glare generation. The recent focus distance of 0.45 meters, with a strong hand shake compensation agencies, to meet the general needs from photography to macro photography.
Oh, 18-135 cheaper than about 18-200 about 1500 or so. 18-200 focal lengths compared to a wider, for some do not want to change the lens and some of the effect of the people is more appropriate, I use the 7D, there is a 18-200, the imaging results are good. Caliber 72mm, lens sturdy, and 50D and other large fuselage is very match; can be equipped with IS, you can get white IS and white contrast, the price difference of 4K; EF-S, for APS-C frame covers a wide angle, very practical.

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