Reviews and Problems with Sigma 18-200mm f/3.5-6.3 II DC OS HSM
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Sigma 18-200 II DC OS HSM Lens for Nikon
Reg, B&H Photo
11 November 2014
Excerpt: This lens is very versatile for the price point.Less expensive doesn't mean its not a quality product. This lens has limitation on the sharpness as well as distortion, overall I like the value for the price. The center of the photography is very sharp, however when you start enlarging or zooming in you tend to loose some detail/blown pixels, etc. If you expect a Nikon quality lens you will need to buy the real thing.
Pros: Easily Interchangeable, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Strong Construction
Excerpt: Just bought this a week ago and put it to good use shooting pictures at a triathlon. Pictures were very sharp. Some difficulty with the autofocus with all of the movement. All in all am very happy.
Excerpt: Bought the Sigma F/3.5-6.3 18-200mm Lens as I has a mishap with my Sony 18-200mm. The price was very good and my experience with the 18-200mm as a "walk around" lens has been great. I must say the Sigma lens was far better than I expected. I use it on my new Sony a65 and the photos are far sharper than my previous lens. the zoom barrel takes a little breaking in but smooths out just fine.
Pros: Consistent Output, Durable, Fast / accurate auto-focus, Lightweight, Nice Bokeh, Sharp Photos Throughout
Summary: I bought this for my Pentax K-30, and one of the factors leaning me towards this lens was the OS or optical stabilizer. When I received the lens it turned out that the manual says "The optical stabilizer is a feature not supported for Pentax cameras" and the title says OS and PENTAX. This is not as bad as it looks for me as the K-30 has an image stabilizer, but if your are using a high focal distance, you miss the lens OS.
Summary: Happy with purchase but yet to realise its full potential - still experimenting. Have the Nikon 18-300mm but this is a bit lighter and easier to carry around which was the reason I bought it actually
Summary: This lens is heavy and doesn't seem to focus as fast and cleanly as my Canon lenses. This is annoying because I mostly use it for low light action shots with occasional object between myself and the subject. It works, but get the brand name if you can afford it.
Summary: I love having an all-in-one lens for photographing children and families indoors and out! It focuses great ad long ad there is plenty of light. In low light, I get more out of focus photos, but no more than I used to with my kit lens. The lens creep is annoying for taking photos of babies laying on their backs, but once I remember to hold it in place, it's fine. The lock mechanism helps, as well. Very happy with this lens! It doesn't come off my camera now!
Summary: This is an easy to use lens, and it takes sharp pictures, even those at a distance. It does however, vignette the pictures (shadows at the corners. But since I often recrop my pictures, this isn't a problem.