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
Both are Pentax K zoom lenses for APS-C. 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 50mm at the wide end
- Our notes say it suits: Everyday APS-C shooting, events and weddings on APS-C, indoor and low-light zoom work
Pick the Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM if
- You need more reach: 135mm vs 50mm at the long end
Spec differences
10 differences| Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) | Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM | |
|---|---|---|
| Brand |
Tamron
|
Pentax
|
| Focal length |
17-50mm
|
50-135mm
|
| Weight |
not listed
|
685 g
|
| Diameter |
not listed
|
77 mm
|
| Min focus distance |
0.27 m
|
not listed
|
| Max magnification |
not listed
|
0.17×
|
| Aperture blades |
not listed
|
9
|
| Optical design |
not listed
|
18 elements / 14 groups
|
| Autofocus motor |
not listed
|
SDM
|
| Released |
not listed
|
2007
|
6 identical specs hidden: mount, type, format, max aperture, filter thread, image stabilization. Show all
- Mount
- Pentax K both
- Type
- Zoom both
- Format
- APS-C both
- Max aperture
- f/2.8 both
- Filter thread
- 67 mm 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
Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM
The Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM is a fast short-telephoto zoom lens covering 50-135mm at f/2.8 for Pentax K mount cameras, with extra-low dispersion glass. A premium weather-resistant "Star" series lens for Pentax K-mount cameras.
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)
Tamron SP AF 70-200mm F/2.8 Di LD (IF) MACRO vs Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM
more reach (200mm) vs wider (50mm)
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* 50-135mm f/2.8 ED IF SDM vs Sigma 17-50mm f/2.8 EX DC OS HSM
more reach (135mm) vs 120 g lighter
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)
Pentax smc Pentax-DA* 50-135mm f/2.8 ED IF SDM vs Sigma 24-70mm f/2.8 DG OS HSM Art
more reach (135mm) vs wider (24mm)