Quick answer
The Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF] is a wide-angle to short telephoto zoom lens covering 28-105mm 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
The Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF] is a standard zoom lens covering 28-105mm at f/4-5.6 for Pentax K mount cameras. The range covers everything from wide scenes to portraits, so it works as a general-purpose lens.
Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF] specifications
What can you shoot with the Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF]?
At 28-105mm this is a wide-angle to short telephoto zoom, which typically suits:
- Landscapes and cityscapes
- Street and travel photography
- Environmental portraits and interiors
- Everyday and street photography
- Natural-perspective portraits
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 | 28–105mm | 19.5–65.5° | 23.3–75.4° |
| APS-C | 1.5x | 42–158mm | 13–46.4° | 15.6–54.5° |
Frequently asked questions
What mount does the Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF] use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF]?
It zooms across 28-105mm with a maximum aperture of f/4.0. That makes it a wide-angle to short telephoto lens.
Is the Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF] a prime or a zoom lens?
It is a zoom lens covering 28-105mm, so you can reframe without moving. Its maximum aperture is f/4.0.
What is the Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF] equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 42–158mm on full frame, with a 13–46.4° horizontal and 15.6–54.5° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Pentax smc Pentax-FA 28-105mm f/4-5.6 [IF] 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 lenses
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