Tokina Pentax K mount Wide-angle zoom
Tokina AT-X 240 24-40mm f/2.8
Quick answer
The Tokina AT-X 240 24-40mm f/2.8 is a wide-angle to standard zoom lens covering 24-40mm at f/2.8 for the Pentax K mount. Its bright maximum aperture handles indoor and evening light reasonably well.
- Full frame
- APS-C (36–60mm equiv.)
- 29 Pentax K cameras
- Focal
- 24–40mm
- Aperture
- f/2.8–22
- Weight
- 520g
- Filter
- 72mm
- Min focus
- 0.4m
- AF motor
- None
What 24-40mm sees
- Full frame crop 1.0×
- 56.8–84.1° 48.5–73.7° horizontal
- APS-C crop 1.5× → 36–60mm
- 39.7–62° 33.4–53.1° horizontal
Diagonal angle of view. Frames drawn to scale at 24mm (and 40mm). Calculated from the focal length and crop factor, not measured.
Open the field-of-view calculatorTokina AT-X 240 24-40mm f/2.8 specifications
Optics
- Focal length
- 24-40mm
- Maximum aperture
- f/2.8
- Minimum aperture
- f/22
- Format coverage
- Full frame
- Optical construction
- 17 elements in 13 groups
- Aperture blades
- 7
Focus
- Autofocus motor
- None
- Minimum focus distance
- 0.4 m
Physical
- Filter thread
- 72 mm
- Weight
- 520 g
- Length
- 78 mm
- Diameter
- 76 mm
Specification source: tokinalens.com
What can you shoot with the Tokina AT-X 240 24-40mm f/2.8?
At 24-40mm this is a wide-angle to standard zoom, which typically suits:
- Landscapes and cityscapes
- Street and travel photography
- Environmental portraits and interiors
- Everyday and street photography
- Natural-perspective portraits
Its bright maximum aperture handles indoor and evening light reasonably well.
Frequently asked questions
What mount does the Tokina AT-X 240 24-40mm f/2.8 use?
It uses the Pentax K mount, so it fits Pentax K cameras directly.
What is the focal length of the Tokina AT-X 240 24-40mm f/2.8?
It zooms across 24-40mm with a maximum aperture of f/2.8. That makes it a wide-angle to standard lens.
Is the Tokina AT-X 240 24-40mm f/2.8 a prime or a zoom lens?
It is a zoom lens covering 24-40mm, so you can reframe without moving. Its maximum aperture is f/2.8.
What is the Tokina AT-X 240 24-40mm f/2.8 equivalent on a crop sensor?
On APS-C (1.5x crop) it frames like 36–60mm on full frame, with a 33.4–53.1° horizontal and 39.7–62° diagonal field of view. These figures are calculated from the focal length and crop factor.
Which cameras does the Tokina AT-X 240 24-40mm f/2.8 fit?
Any Pentax K-mount camera, including Pentax *ist DL, Pentax *ist DS, Pentax K-01, Pentax K-1, and Pentax K-3 and 24 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 24-40mm lenses
Browse by focal length: 24mm lenses, 40mm lenses