Quick answer
The Pentax smc DA 17-70mm F4.0 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
Pentax smc DA 17-70mm F4.0 AL (IF) SDM: a standard zoom lens with a 17-70mm focal length and a maximum aperture of f/4.0, made for Pentax K mount cameras. The range covers everything from wide scenes to portraits, so it works as a general-purpose lens.
Pentax smc DA 17-70mm F4.0 AL (IF) SDM specifications
- Brand
- Pentax
- Mount
- Pentax K
- Focal length
- 17-70mm
- Maximum aperture
- f/4.0
- Lens type
- Zoom
- Format coverage
- aps-c
- Released
- 2008
- Optical construction
- 17 elements in 12 groups
- Aperture blades
- 7
- Autofocus motor
- SDM
- Minimum focus distance
- 0.28 m
- Maximum magnification
- 0.31x
- Filter thread
- 67 mm
- Weight
- 485 g
- Diameter
- 75 mm
Specification source: en.wikipedia.org
What can you shoot with the Pentax smc DA 17-70mm F4.0 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 |
|---|---|---|---|---|
| APS-C | 1.5x | 26–105mm | 19.5–70.4° | 23.3–80.6° |
Frequently asked questions
What mount does the Pentax smc DA 17-70mm F4.0 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 smc DA 17-70mm F4.0 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 smc DA 17-70mm F4.0 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 smc DA 17-70mm F4.0 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 smc DA 17-70mm F4.0 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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