Quick answer
The Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM is a ultra-wide to standard zoom lens covering 17-70mm at f/4.0 for the Pentax K mount. Its moderate maximum aperture works best in good light or with a higher ISO.
About this lens
A 17-70mm f/4 standard zoom lens, the Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM is designed for Pentax K mount bodies. The range covers everything from wide scenes to portraits, so it works as a general-purpose lens.
Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM specifications
What can you shoot with the Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM?
At 17-70mm this is a ultra-wide to standard zoom, which typically suits:
- Landscapes and big skies
- Architecture and interiors
- Astrophotography and night skies
- Landscapes and cityscapes
- Street and travel photography
Its moderate maximum aperture works best in good light or with a higher ISO.
Full-frame equivalent and field of view
Calculated from the focal length and crop factor. Not measured.
| Sensor | Crop | Equivalent | Horizontal FOV | Diagonal FOV |
|---|---|---|---|---|
| Full frame | 1.0x | 17–70mm | 28.8–93.3° | 34.3–103.7° |
| APS-C | 1.5x | 26–105mm | 19.5–70.4° | 23.3–80.6° |
Frequently asked questions
What mount does the Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM?
It zooms across 17-70mm with a maximum aperture of f/4.0. That makes it a ultra-wide to standard lens.
Is the Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM a prime or a zoom lens?
It is a zoom lens covering 17-70mm, so you can reframe without moving. Its maximum aperture is f/4.0.
What is the Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 26–105mm on full frame, with a 19.5–70.4° horizontal and 23.3–80.6° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Pentax HD Pentax-DA 17-70mm f/4 AL [IF] SDM fit?
Any Pentax K-mount camera, including Pentax K-1, Pentax K-3, Pentax K-3 II, Pentax K-3 Mark III, and Pentax K-30 and 15 more.
Alternatives for Pentax K from other brands
All Pentax K lensesSame mount, overlapping focal range, closest maximum aperture first.
More Pentax lenses for Pentax K
All Pentax lensesOther 17-70mm lenses
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