Quick answer
The Tokina AT-X 50-135mm f/2.8 PRO DX is a standard to short telephoto zoom lens covering 50-135mm at f/2.8 for the Pentax K mount. Its bright maximum aperture handles indoor and evening light reasonably well.
About this lens
Tokina AT-X 50-135mm f/2.8 PRO DX: an APS-C fast short-telephoto zoom lens with a 50-135mm focal length and a maximum aperture of f/2.8, made for Pentax K mount cameras. The range suits portraits and general telephoto work.
Tokina AT-X 50-135mm f/2.8 PRO DX specifications
What can you shoot with the Tokina AT-X 50-135mm f/2.8 PRO DX?
At 50-135mm this is a standard to short telephoto zoom, which typically suits:
- Everyday and street photography
- Natural-perspective portraits
- Documentary and travel work
- Portraits with a flattering perspective
- Events and weddings
Its bright maximum aperture handles indoor and evening light reasonably well.
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 | 50–135mm | 15.2–39.6° | 18.2–46.8° |
| APS-C | 1.5x | 75–203mm | 10.2–27° | 12.2–32.2° |
Frequently asked questions
What mount does the Tokina AT-X 50-135mm f/2.8 PRO DX use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Tokina AT-X 50-135mm f/2.8 PRO DX?
It zooms across 50-135mm with a maximum aperture of f/2.8. That makes it a standard to short telephoto lens.
Is the Tokina AT-X 50-135mm f/2.8 PRO DX a prime or a zoom lens?
It is a zoom lens covering 50-135mm, so you can reframe without moving. Its maximum aperture is f/2.8.
What is the Tokina AT-X 50-135mm f/2.8 PRO DX equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 75–203mm on full frame, with a 10.2–27° horizontal and 12.2–32.2° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Tokina AT-X 50-135mm f/2.8 PRO DX 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 Tokina lenses for Pentax K
All Tokina lensesOther 50-135mm lenses
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