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The following opinions have been automatically translated with Google Translate.
Cons:short focal length, diffilcoltà of some specimens to focus at minimum range, embarrassing games on the barrel, only suitable format APSC
Opinion:Although not having this point I could use it for a couple of years, the building leaves much to be desired and lacks the sealing was found in most specimens a certain difficulty in focusing at minimum focus. That said optical quality and at a good level, and taking into account the price at which it is used may be a good upgrade to the 18-55 standard. The colors and sharpness are excellent especially since the maximum aperture at 16mm focal length decreases slightly to maximum 45mm. Diaframmando there is an increase in performance and decrease in vignetting at f8 images are sharp at all focal lengths and on almost the entire frame. The colors are warm in style Pentax, on my copy I noticed an imperfect seal species to flare with the source of light almost out of frame.
Pros:constant aperture, image quality, versatile, minimum distance of focus, fast autofocus, price
Cons:the minimum focal length, the maximum short focal length, not weather sealed
Opinion:I purchased this lens to replace the valid while SMC Pentax DA 18-55 3.5 to 5.6 ED WR, both for the best optical performance at all focal lengths, that for the diaphragm constant. I found just excellent from the optical point of view. In many cases if the beats on a par with the most expensive SMC DA 17-70 f / 4 and SMC DA * 16-50 f / 2,8 and costs much less. The picture quality is excellent at all focal lengths and has a nice color rendering. He did not even particularly pronounced distortion at 16mm, and they are still easily correctable in post production. The vignetting at 16mm can sometimes be obvious wide open, but stopping down one or two stops, the problem disappears. The focal more behaves very well from this point of view. The zoom is a little short from the "tele", 45mm can sometimes be few. But he has a minimum focusing distance of very short which allows you to use it even for close-up photos and details with a magnification ratio of approximately 1:4. One downside to this lens is the focal length at minimum: using the built-in flash you get pronounced shadows and so you need to use only a 20mm focal up or with an external flash. The other defect or failure in my opinion is the tropicalization. It would be helpful since the combination with SLR as K5 and K7. It is used with good facilities and really good prices.
The following opinions have been automatically translated with Google Translate.
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