A Lente Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM é uma lente f/4 de abertura fixa e alta qualidade projetada exclusivamente para o uso com câmeras SLR digitais. Essa lente une avançadas tecnologias óticas, incluindo elementos aesféricos, elementos de vidro ótico especial e revestimentos de lente original. Ela oferece uma faixa de zoom versátil grande angular até telefoto média e permite uma gama mais ampla de aplicações de fotografia com lentes zoom padrão.
Esta lente vem equipada com o sistema de focagem SDM, que garante uma operação mais suave e silenciosa utilizando um motor supersônico integrado. Como esta lente possui apenas contatos elétricos para a comunicação entre a lente e a câmera, a autofocagem só será possível com câmeras DSLR que suportam SDM (e.g. K10D, K20D, K100D Super, K200D e modelos mais recentes). Quando montada em corpos de câmera digital SLR Pentax mais antigas, será possível apenas a focagem manual.
| Performance | |
|---|---|
| Focal Length |
17 - 70 mm Comparable APS-C Focal Length: 25.5 - 105 mm |
| Aperture |
Maximum: f/4 Minimum: f/22 |
| Camera Mount Type | Pentax K |
| Format Compatibility | Pentax Digital (APS-C) |
| Angle of View | 79° - 23° |
| Minimum Focus Distance | 11.04" (28.04 cm) |
| Magnification | 0.31x |
| Maximum Reproduction Ratio | 1:3.22 |
| Groups/Elements | 12/17 |
| Diaphragm Blades | 7 |
| Features | |
|---|---|
| Image Stabilization | No |
| Autofocus | Yes |
| Tripod Collar | No |
| Physical | |
|---|---|
| Filter Thread | 67 mm |
| Dimensions (DxL) | Approx. 3.0 x 3.7" (7.62 x 9.40 cm) |
| Weight | 1.07 lb (485 g) |
REVIEW SNAPSHOT®
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Most Liked Positive Review
Winner...with a Quirk
I bought this lens as an upgrade to my 16-45mm f/4 lens. The older 16-45mm lens has excellent sharpness, contrast and color reproduction, but lacks in build quality and under certain...Read complete review
I bought this lens as an upgrade to my 16-45mm f/4 lens. The older 16-45mm lens has excellent sharpness, contrast and color reproduction, but lacks in build quality and under certain conditions shows significant color fringing. To my delight the 17-70mm equals or betters its older cousin in all optical categories, even with its extended zoom range. Also, the build quality is excellent and the color fringing is much better controlled. With the SDM, lens mounted motor, the focus is fast, accurate and nearly silent.
Now the "Quirk". This lens will only auto-focus with the SDM. It is manual focus only on camera bodies that pre-date the K10D. But, the manual focus ring on this lens is very thin, extremely "loose" in feel and only rotates 1/8 turn from stop-to-stop. None of which is condusive to accurate manual focusing.
If your camera supports SDM and you primarily use auto-focus, this lens is excellent for its price range, both optically and mechanically. If your camera doesn't support SDM or you plan to do a lot of manual focusing, don't buy this lens.
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Most Liked Negative Review
Not as good as I hoped
I bought this to replace my old DA16-45mm as a general purpose zoom but am disappointed in the optical performance in the 50-70mm range. f/4 aperture also doesn't show good performance throughout...Read complete review
I bought this to replace my old DA16-45mm as a general purpose zoom but am disappointed in the optical performance in the 50-70mm range. f/4 aperture also doesn't show good performance throughout the range but the lens is very good from 17mm through to 35mm or 50mm especially stopped down a stop or two. It has less barrel distortion and chromatic aberration than my DA*16-50mm but otherwise doesn't match that pro level lens (or any of my Pentax primes).
The the DA17-70mm appears well made, the zoom actuation is nice and tight and the SDM focus accurate and hunt-free. The rubber weather ring on the mount is a nice touch to at least cover a potential ingress point for moisture to the body even though the lens is not weather resistant.
Overall a very attractive general purpose zoom if it wan't for the poor optical performance at the long end. This is what dragged it down to 3 stars for me - otherwise it would be much higher. I can only hope mine is poorly made and that other examples are better optically.
REVIEWS
Reviewed by 28 customers
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
Has hardly been off my K7 since I bought it. The long end is especially nice. It could be a tad sharper at the long end, but only in comparison to my old 85mm f1.8. Very low distortion and performs really well in backlit situations. Seems to be very solid mechanically.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
I bought this Pentax lens to travel light and to replace a Sigma lens 18-125.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
I bought and used this for a vacation and the pictures were very sharp and the colors were very nice. I received some nice comments about my pictures. I am very happy with my purchase.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
This is an excellent walk around general purpose lens for APS-C cameras. The zoom range is very useful,it focuses quickly and the images are very satisfactory.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
I upgraded from a Sigma 17-70mm and the Pentax is sharper and has better colors. At f/4 it is already very sharp. The only weakness is that it could be a little sharper at 70mm. Otherwise, this is the best standard lens currently out there for Pentax.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
Focussing is quick and mostly accurate. SDM works well, manual 'focus touch up' feature is good. The focal length range (26-107mm equiv) is really useful. It is sharp at F8 and 5.6, and nearly as good wide open at F4. Considering its range and speed, the weight and size of this lens is fairly easy to cope with. It also has reasonable macro capabilities. Finally, the lens appears to be robust and well made. A great all rounder
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
- I work indoors, so used it only indoors
- very sharp
- In low light must use high ISO still looked sharp with pentax K5
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
I bought this to replace my Sigma 18-200 as a general purpose zoom, but I'am disappointed in the optical performance in the 18-70 mm .The front block of lenses has a free wheeling more than in 4 mm and deviates easily a lens axis extensively.Not correct focusing, bad sharpness/
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
First, let me say that I do not particularly like zoom lenses. I am a sucker for primes and I have never found a zoom lens that really satisfies me, image quality-wise.
That being said, this lens provide a good, convenient focal length range, very quick/quiet autofocus on my K-5, and quite nice color rendition. As far as utility is concerned, is a great lens to own. Its macro performance (though it is not really advertised for this) is not so bad either: It does have a fairly impressive magnification ratio for a standard zoom - and closeups I have taken with it look very nice.
Sadly, there are some drawbacks to it also. Images at f/4 are not all that great-looking. Things improve at f/5.6 in most focal lengths, but it is still not strikingly sharp - and purple/blue fringe can often be found on highlight edges (and such that it is difficult to remove). At f/6.3, this lens improves greatly. At f/8, it looks quite nice, though certainly not as sharp as a good prime. I have not really experimented enough with smaller apertures to comment in detail about its performance at f/11, f/16, etc. but it seems to perform well enough, from what I have seen.
I am not really too disappointed, however, as I got more-or-less what I expected: A good walk-around lens with fast, quiet autofocus. When IQ is critical, I simply use my primes.
Would I recommend it? Well, that depends. If your expectations are realistic, then it is fine. It is a very practical lens (and MUCH nicer than the Sigma/Tamron "super-zooms") but it is certainly no all-in-one solution for great-looking photos. Buy this as a substitute/replacement for the kit lens; buy some decent primes for more critical applications.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
I am a very amature photographer. I needed a versatile lens for close up and telephoto scenes. This lens takes sharp pictures, is easy to use, is not very heavy and travels well. The DA 17-70 mm does it all well. The price is a bit steep but the I'm happy I bought it.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
Covers just about any range you could want. Fast and accurate focusing.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
I bought this lens to complement rather than replace the 18-55 kit lens. The 17-70 lens is a very solid built lens that focuses ever so quietly, with excellent clarity and color.I would definitely purchase this lens again.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
Great walk around lens, light,AF quick,smooth handling,.Wish litlle faster! Very good lens
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
Coming from the DA*16-50 which I found to be too big for a general walk-about lens I find the DA17-70 to be a nive lens. The filter size matched my DA*60-250 so the DA17-70 pairs up really good with the DA*60-250. Now just add a low light lens and a macro lens the kit will cover about anything.
Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
great walk around lens. extremely sharp throughout the range except at 70mm you have to stop down a 1/2 a step at least, otherwise a great piece of glass. I had the sigma 17-70mm, IQ and contrast of the Pentax is much better. SDM is fast and quit. Highly recommended!
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
I and my wife use this lens on our K200D for domestic use, flowers and vacations. I like the control a DSLR provides and this lens gives me full range for all of our photos.
The lens works well with a very rapid auto focus. We take very acceptable pictures across the whole zoom range. The look good on our 40" HDTV.
The lens is heavier than than the standard 18-55 but in my view it provides a better balance of quality; camera to lens.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
Very well made like all the other Pentax lenses I own. Good rendering of color with no distortion that I can see. It has found a permanent place in the day bag.The bag is getting pretty full.
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
Ease to use!
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
Great lens. Renders sharp images with wonderful colors
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Comments about Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR:
I use this lens for almost everything, close focus for flower pictures(at 70mmF4.5 )Beautiful.Portraits,Landscapes,Kids,Flowers, Weddings and just plain walking around.Great Zoom, BUY IT!
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