Sigma 17-50mm F/2.8 EX DC OS HSM Zoom Lens for Nikon DSLR Camera

Excellent for all level photographers

I am using it for my pentax k5iis. Very good and smart replacement to the standart kit. Accurate and silent autofocus

ｋマウントのサード商品が絶滅した現在で新品は中々変えない中で3万円台で買えたのはラッキーでした。画質も明るさも申し分なく満足の行く商品でした。

I love the image quality and the sharpness, and it focuses quickly and quietly on my camera. The only downside is its weight and size.

Having decided that I needed a good quality, fast portrait/landscape lens to compliment my telephoto lenses, I spent countless hours reading reviews (both user and professional) on this lens and the Pentax equivalent, the DA* 16-50mm. Whilst the Pentax came across as a 'Marmite' lens (people either loved it or hated it!) the reviews for the Sigma were very consistent ie it's a very good lens. Factor in the £520 premium you have to pay for the Pentax (ok, you do get weather resistance, 2 extra aperture blades and an extra 1mm at the wide end!) and, quite frankly, it was a no brainer.Straight from the box, this lens oozes quality. Taking it out of the padded, zipped case the weight tells you that you have a lot of good quality glass in this lens. Some people may find it a tad too heavy but it balances perfectly on my K50 (it weighs more than my Sigma 18-250mm tele lens!).Build quality seems fantastic for a lens of this price. Though it has a metal lens mount the body is made of plastic. Don't let this put you off as it feels top quality and very well nailed together. The zoom ring turns counter clockwise (not a problem for me as I have Sigma anyway) which some people may find strange but you soon get used to it. It's about a 90 degree turn from wide to tele and the zoom action is very smooth.Autofocus is very quick and accurate (especially on single point af) though as yet I haven't tested it in very low light. Don't take any notice of the minimum focussing distance, as with a bit of readjustment of the focus point and in the right light I've managed to get great quality images at half the recommended distance!When it comes to colour rendition and clarity this lens is truly astonishing. Colours are so accurately reproduced and the clarity of the test photographs that I've taken thus far is incredible. The focal point of close up images just seems to pop out at you. My time spent in PP has reduced dramatically and a lot of images just require a small amount tweaking.In summary, whilst it's early days yet this lens has blown my socks off!

Nothing to say about the sailor, only about this lens. It is not fully compatible with my Pentax K5 camera. Sometimes, it give me a wrong exposition reading, often over exposed. (compare with my unfortunately dead Pentax 16-50 F2.8. But it is personal opinion.