Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) vs Tokina AT-X 240 24-40mm f/2.8
Both are Pentax K zoom lenses. Here is what actually differs.
Pick the Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) if
- You want a wider view: 17mm vs 24mm at the wide end
- You need more reach: 50mm vs 40mm at the long end
- You shoot close-ups: it focuses down to 0.27 m vs 0.4 m
- Our notes say it suits: Everyday APS-C shooting, events and weddings on APS-C, indoor and low-light zoom work
Pick the Tokina AT-X 240 24-40mm f/2.8 if
- You shoot full frame: the Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) is made for APS-C
Spec differences
11 differences| Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) | Tokina AT-X 240 24-40mm f/2.8 | |
|---|---|---|
| Brand |
Tamron
|
Tokina
|
| Format |
APS-C
|
Full frame
|
| Focal length |
17-50mm
|
24-40mm
|
| Weight |
not listed
|
520 g
|
| Length |
not listed
|
78 mm
|
| Diameter |
not listed
|
76 mm
|
| Filter thread |
67 mm
|
72 mm
|
| Min focus distance |
0.27 m
closer
|
0.4 m
|
| Aperture blades |
not listed
|
7
|
| Optical design |
not listed
|
17 elements / 13 groups
|
| Autofocus motor |
not listed
|
Manual focus
|
4 identical specs hidden: mount, type, max aperture, image stabilization. Show all
- Mount
- Pentax K both
- Type
- Zoom both
- Max aperture
- f/2.8 both
- Image stabilization
- No both
Our notes
Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF)
A popular APS-C standard zoom with a constant f/2.8 aperture, much used on Pentax bodies with in-body stabilization. It has a 67mm filter thread and a minimum focus distance of 0.27 m.
Pros
- Constant f/2.8
- Compact 67mm filter size
- Constant aperture with in-body stabilization support
- Works with Pentax in-body stabilization
Cons
- APS-C only
- No weather sealing
- Plastic build
Our notes
Tokina AT-X 240 24-40mm f/2.8
More comparisons
Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) vs Pentax smc Pentax-DA* 16-50mm f/2.8 ED AL IF SDM
everyday APS-C shooting vs wider (16mm)
Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM vs Tokina AT-X 240 24-40mm f/2.8
wider (16mm) vs 45 g lighter
Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) vs Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM
wider (17mm) vs more reach (135mm)
Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) vs Sigma 17-50mm f/2.8 EX DC OS HSM
everyday APS-C shooting vs stabilized
Pentax smc Pentax-DA* 16-50mm f/2.8 ED AL IF SDM vs Tokina AT-X 240 24-40mm f/2.8
wider (16mm) vs covers full frame
Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) vs Sigma 24-70mm f/2.8 DG OS HSM Art
wider (17mm) vs more reach (70mm)