PentaxHD-DA Fish-Eye 10-17mm F3.5-4.5 ED Ultra Wide Angle Zoom Lens Compact & Lightweight Diagonal fisheye Lens for K-1 II,K-70, KP & PENTAX DSLR Cameras, Black, 23130

Absolutely phenomenal Pentax Zoom lens!Great focal range from portrait to long distance shots this lens is super duper speedy and weather resistant, offering tack sharp images with great color rendering and contrast.A MUST OWN!Very happy with this purchase -More PENTAX LOVE

I bought this for sports photography to complement my new K3 Mark III.What I found was this lens does remarkably well for all around work as well as having the ability to do spectacular macro photography. It's not 1-1 but for flowers, and closeups, the color and detail are amazing.The speed of focus is world's better than the previous 55-300 ED. The new focusing system is lightning fast, and solid. Note the egret and heron photos - these were a hip-shoot of an egret and heron leaping into the air, I turned as fast as I could and just held the shutter for a burst at 300mm hoping to get a shot. The focus was spot on even if the shutter was not as fast as I would like. the flower was taken from about 10 inches away at 190mm f6.3.For a general purpose, lightweight walk around lens this is a winner.

I bought this to use on a K-S2, and loved it. Insanely fast focus, relatively light and portable lens. Image quality is good throughout the zoom range. The PLM focus is unbelievably quick, silent, and does not have the hunting issues that Pentax often suffers from. While Pentax is usually not recommended for sports or other high speed photography, this lens works very well and the three airshows I've taken it to, I never found it lacking.I have since swapped my K-S2 for a K1 mk2 and was initially going to sell this lens to buy a 150-450(another great lens), but decided to also keep this for travel. It's basically the same size as the 28-105mm FA lens. The size of this lens and the low amount of vignetting on a full frame means it is still a viable lens on a FF platform.Short version:On APS-C it is one of the best telephoto lenses available.On FF it is perfectly suited as a telephoto lens for travel where you want more reach, but want to avoid the bulk of a much larger lens.

Aug 2016 updateTook this lens on a multi-week vacation in Hong Kong. The weather was hot and humid. Together with a K-3II and this lens, the combination performed flawlessly. The three attached pictures were taken with this combination. All hand held except for the night scene. A fast lens (ie f/2.8 or better) is not required for this type of scene.Nov 2015 updateI now have spent more time and come to really appreciate the strengths of this lens. Corner sharpness is head and shoulder better than the Tamron 17-50! This is a big surprise to me. At 50 mm, the FA 50 f/1.4 is still better at comparable aperture, but not by much. This finding actually presents a problem for me - I am starting to look for a better fast standard zoom.***** Original review *****I have a read a lot of reviews on this lens. But before saying anything, I need to state that I already have a Pentax 18-135 and Tamron 17-50. The Tamron 17-50 is my most used lens and with the 18-135 as my rainy day lens. The two main reasons for considering this 16-85 is 1) better optics than the 18-135 and 2) the wider 16 mm than either the 17-50 or 18-135. The 1mm difference between the 17mm on the Tamron and 16mm on the Pentax is huge. I like WA lens; I have a Sigma 8-16 UWA, Samyang 8mm & 14mm. With this 16-85, it will reduce the number of times I need to swap lenses. I am not so concerned with losing the 85-135 region because I have several lenses to cover that, including Pentax 55-300, Pentax 50-135, and Sigma 70-200.In terms of optical performance, it does not disappoint me. It is significantly sharper than the 18-135 especially wide open aperture. It is comparable to the Tamron 17-50 at corresponding focal length and aperture. In other words, I can really get along well with this WR combination - 16-85 and 55-300 - for casual situations and landscape photography where fast aperture is not usually needed. I have not tested flare resistance, but reports so far seems to confirm the superiority of the HD coating. AF is very fast and silent; it seems to be faster than 18-135. It does require a -4 focus adjustment on a K-S2 while none for the 18-135. I have not tested on my K-5IIs but I expect similar results.The lens is much larger than my expectation. Both the 18-135 and Tamron 17-50 are small compared to this 16-85. So I am not saving space when I substitute this 16-85 for the Tamron 17-50. The filter size is 72 vs 67 on the Tamron. The lens is well build but not heavy despite the size. The lens hood is well design.I took one star off because it is not perfect. It is substantially more expensive than either the 18-135 or the Tamron 17-50. Aperture is neither fast nor constant. I would pay a little more to have constant f/4.0. The slower aperture especially towards the long FL end does not lend itself to challenging low light photography.In summary, I highly recommend this lens if you can live within the constraints of the lens. WR is handy if you find yourself in wet or rainy environment.

Carefully tested this lens as I do all new lenses I buy. This sample was was sharp across the frame at all focal lengths by f5.6. Slightly soft in the corners at 16mm at f3.5, but not bad. Autofocus is fast and silent. As with all zooms I've encountered, the internal focusing shortens the effective focal length to focus closer. My estimates of the effective focal length when the lens is set at 85mm and focused at 10 ft it is about 83mm; focused at 5 ft about 77mm; at 3 ft. about 70mm; and focused at the closest distance of about 13.5 inches the effective focal length is about 50mm. Focused very close with lens set at 85mm the image was very sharp and high quality but the area covered was about what you would expect with a 50mm lens not an 85mm lens so it is acting like a 50mm macro not an 85mm macro lens when focused up extremely close. Not a flaw. Every zoom I have ever tested behaves this way. Just do not expect an 85mm macro performer. An excellent lens and the sharpest all purpose zoom lens I have used on a Pentax. It seems to be very well built. I wish it had a marked focusing scale, but otherwise I am very favorably impressed with this lens. I am a very experienced photographer. Be sure to test your sample because there have been some reports on Pentax forums of people getting samples with elements decenterd which would give you images sharper on one side than the other.

My copy was sharp wide open in center and the borders were a bit less sharp but good nonetheless.From F4.0 ,it's pretty sharp everywhere in the frame.I verified this with manual focus because the autofocus was very inconsistent and inacurate most of the time.I tried the lens on two different cameras and the same thing happened so the copy of this lens was a dud obviously.I returned it for a refund.If you buy this lens,just take the time to fully test it rapidly.Don't assume the quality control is good,it's not.That said,if you can get a good copy,it's a great zoom.

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I purchased this lens to use with a Pentax K-70 to get more reach. I was pleasantly surprised by the quality of images I can get with this lens. It is quite sharp in the center throughout the zoom range and the corners improve as the lens is stopped down. It is probably the weakest right at 300 mm but the center is still acceptable. Bokeh is pleasant although there is not a ton depending on the shooting situation. The biggest difference between this and other Pentax lenses is the focusing speed. This PLM lens focuses lightning fast and is accurate, I hope that they manufacture other lenses with this technology. Given the aperture range of this lens you probably wont be able to do much shooting in lower light scenarios but the modern Pentax bodies have strong higher ISO performance that can help compensate.Overall I highly recommend this lens to someone who wants more reach and weather sealing for their Pentax camera without breaking the bank.

Buen zoom de viaje.

Snabb, tyst och träffsäker autofocus. Önskar jag köpte detta långt tidigare :)