Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR

Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR

Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR

B&H # PE17704DA MFR # 21740
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  • Zoom Super Wide-Telephoto

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Pentax 17-70mm f/4.0 overview

  • 1Description

The Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Lens is a high-quality fixed-aperture f/4 lens designed exclusively for use with digital SLR cameras. This lens brings together advanced optical technologies, including aspherical elements, special optical-glass elements, and original lens coatings. It offers a versatile wide to medium-telephoto zoom range, and allows for a wider range of shooting applications over the more standard zoom lenses.

This lens comes equipped with the SDM focusing system, which assures smoother and quieter auto-focusing operation by using a built-in supersonic motor. Since this lens only has electrical contacts to communicate between the lens and the camera, autofocusing will only be possible with DSLR cameras that support SDM (e.g. K10D, K20D, K100D Super, K200D, and later models). When mounted on older Pentax digital SLR camera bodies, only manual focusing will be possible.

Note: Not recommended for 35mm film SLR cameras, and digital SLR cameras that don't support SDM feature.

Ultra-Wide to Medium-Telephoto
Equivalent focal length of 26-107mm in 35mm format, when used with digital SLR cameras.
High Optical Performance
ED and aspherical elements compensate for chromatic and spherical aberration.
Exclusive Digital Design
The image circle of the lens has been created to match the smaller image recording area of digital SLR cameras. This ensures precise optical performance ideally suited to the camera's digital imaging characteristics.
SP Coating
SP (Super Protective) coating made of a special fluoride compound has been applied to the front surface of the new lens through the use of a unique evaporation process. As a result, the lens offers excellent water- and oil-repellent performance and makes for easier cleaning should the lens be accidentally smeared with fingerprints or cosmetics.
Quick-Shift Focus System
The Quick-Shift Focus System allows to instantly shift to manual focus once the subject is captured by AF.
Updated Lens Mount
Features the Pentax KAF3 mount, which incorporates electrical contacts to drive the built-in supersonic motor used in autofocusing operation. 1
UPC: 027075141223
In the Box
Pentax SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR
  • 67mm Lens Cap
  • Rear Lens Cap
  • PH-RBM67 Lens Hood for the SMCP-DA 17-70mm f/4 AL (IF) Lens zrtyysufywzaswvusxbtavsrdtqrfyffw
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Pentax 17-70mm f/4.0 specs

    Performance
    Focal Length 17 - 70mm
    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
    Optical Design 17 Elements in 12 Groups
    Diaphragm Blades 7
    Features
    Image Stabilization No
    Autofocus Yes
    Tripod Collar No
    Physical
    Filter Thread 67 mm
    Dimensions (DxL) 3.0 x 3.7" / 7.62 x 9.40 cm
    Weight 1.07 lb / 485 g
    Packaging Info
    Package Weight 1.5 lb
    Box Dimensions (LxWxH) 5.7 x 4.3 x 4.2"

    Pentax 17-70mm f/4.0 reviews

    SMCP-DA 17-70mm f/4 AL (IF) SDM Autofocus Lens for Digital SLR is rated 4.2 out of 5 by 42.
    Rated 5 out of 5 by from Great Lens! This was my first lens purchase other than the DAL 18-55 and the DA 50-200 that came with my K-30. Overall, I'm very pleased with this lens. The photos I'm taking with this lens have been very sharp and an obvious improvement from the kit lens. I love the size of the lens and it has a good weight and makes the camera look more substantial. The auto focus is whisper quiet which is great when you want to be less obvious that you are taking photos out and about. After using a lens that can create such sharp images makes me not want to use the lenses that came with my camera. Some say IQ is overrated. I disagree!
    Date published: 2012-11-15
    Rated 1 out of 5 by from SDM Motors Still Failing Let me start by saying I'm a big Pentax fan. I've owned 3 camera bodies and own 7 different Pentax lenses. Great equipment but the SDM motors on these lenses have been an utter failure. The fanboys and Pentax PR people will tell you the issue has been fixed but don't believe it. The SDM motor on my fairly new 17-70 lasted barely over a year and now it's been sent off for repair. Great images yes, but if I can't use it because it's broke what good is it? Pentax should have done the proper thing and pulled all SDM lenses as a recall and reimbursed their loyal customers who purchased this failed product. Save yourself the hassle and purchase the Sigma 17-70 instead.
    Date published: 2013-11-08
    Rated 5 out of 5 by from The little lens that Can This is a main general purpose lens I use in a variety of shooting situations including inclement weather, florals, landscapes,and seascapes..to name a few indeavors. This lens never fails to turn out sharp pictures that are pleasing to the eye. This is an outstanding lens for the price with good quality,it is a good match for my K20 and gets the job done time after time.
    Date published: 2008-11-05
    Rated 4 out of 5 by from 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 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.
    Date published: 2008-09-14
    Rated 3 out of 5 by from A decent lens for the money 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.
    Date published: 2011-06-01
    Rated 3 out of 5 by from 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 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.
    Date published: 2008-09-11
    Rated 5 out of 5 by from I'm very happy with this lens The lens is well-made, the SDM focusing is fast and quiet (used on a Pentax K20D), images are sharp throughout the zoom range, the bokeh is pleasing, and the lens is weatherproof. All-in-all, a great lens and one that will stay on my camera most of the time because of its versatility and excellent performance. I would definitely recommend this lens if you want to upgrade from the 18-55 kit lens (a great little lens in its own right) for a little extra zoom and the SDM focusing capabilities.
    Date published: 2009-02-25
    Rated 4 out of 5 by from Nice general walk-about lens 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.
    Date published: 2010-06-22
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    Pentax 17-70mm f/4.0 Q&A

    Pentax 17-70mm f/4.0 accessories

    Designed for use with:

    • Pentax K-01
    • Pentax K-3
    • Pentax K-3 II
    • Pentax K-30
    • Pentax K-5
    • Pentax K-5 II
    • Pentax K-5 IIs
    • Pentax K-50
    • Pentax K-500
    • Pentax K-7
    • Pentax K-70
    • Pentax K-S1
    • Pentax K-S2
    • Pentax K-r
    • Pentax K-x
    • Pentax KP
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