Reviews and Problems with Sigma 18-200mm f/3.5-6.3 II DC OS HSM
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Read the specs carefully !
9 March 2014
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 used this lens for the last year or so and have taken approx. 15k images with it. Mostly portraits, but some action shots. I've noticed at first when you turn the camera on it's side to get a vertical picture, the image would "shake" in the viewfinder. Give it a second or two and it will settle down. This started only on the vertical pictures, but it has now spread to the horizontal pictures too.
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: I would definitely compare this to OEM lens at higher prices. Got rid of my 18-70 and 55-200mm lens so I don't have to change lens often. I thought I would be un happy with the slower speed at 18mm compared to other lens, but surprisingly I have not had any issues with the speed of the lens. Appears and feels like good quality. Has some lens creep, but that is expected.
Summary: This is an older lens and doesn't always work well with my Nikon D5100. The autofocus often gets 'confused' and goes more out of focus than in, forcing the use of manual focus. Does not fire nearly as fast as my Nikon lenses when shooting sporting events. If I had it to do over again, I'd put the money towards a lens designed for a DSLR, the electronics in this lens don't seem to be able to keep up, whether it's due to age or design I don't know.