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|Weight||15.2 oz (431 g)|
|Dimensions (DxL)||Approx. 2.8 x 3.4" (71.12 x 86.36 mm)|
|Filter Thread||Front:62 mm|
|Angle of View||76.5° - 8.1°|
|Minimum Focus Distance||15.4" (39.12 cm)|
|Maximum Reproduction Ratio||1:3|
|Focal Length||18 - 200mm
Comparable 35mm Focal Length: 27 - 300 mm
|Diaphragm Blades||7, Rounded|
|Aperture||Maximum: f/3.5 - 6.3
|Camera Mount Type||Pentax K|
The Sigma 18-200mm F3.5-6.3 DC Macro OS HSM lens trades some optical quality for a compact design, low cost, and long zoom range.
Long 11.1x zoom range. Compact. Maximum 1:3 macro magnification. Optically stabilized. Compact. Available for most APS-C camera systems. Attractive price tag.
Sharpness suffers at maximum aperture. Distortion throughout zoom range.
Bought my 18-200 on march 8th 2015 and it has become my go to zoom for my Pentax K-3. For a relatively inexpensive zoom its very sharp through out the focal length, providing you keep the aperture a stop or two over fully open. It's relatively quiet and does not 'hunt" for focus which is a plus.
Good lens, no problems. Has good smooth zoom operation.
I am copying here my dyxum review: Compared to: Sigma 18-200 3.5-6.3 (first version) Positive: Focal range Size, weight Sharpness Quiet HSM focusing AF accuracy Negative: Vignetting AF speed Review: I used to have the older (first) screw drive version of the lens which served me well for some time,...
Great lens for carrying all day, excellent sharpness and bokeh. Used all the time on my Sony A58