Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) vs Sigma 17-70mm f/2.8-4 DC Macro OS HSM
Side-by-side comparison from our catalogue data. Better values are highlighted only where a clear difference exists.
Verdict at a glance
- Sigma 17-70mm f/2.8-4 DC Macro OS HSM reaches further (70mm vs 50mm).
| Spec | SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF) | 17-70mm f/2.8-4 DC Macro OS HSM |
|---|---|---|
| Brand | Tamron | Sigma |
| Mount | Pentax K | Pentax K |
| Type | Zoom | Macro |
| Focal length | 17-50mm | 17-70mm |
| Max aperture | f/2.8 | f/2.8 |
| Format | aps-c | n/a |
| Filter mm | 67 | n/a |
| Min focus m | 0.27 | n/a |
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
Sigma 17-70mm f/2.8-4 DC Macro OS HSM
Sigma 17-70mm f/2.8-4 DC Macro OS HSM: an APS-C macro zoom lens with a 17-70mm focal length and a maximum aperture of f/2.8-4, made for Pentax K mount cameras, with Optical Stabilizer and Hyper Sonic Motor autofocus. It is intended for close-up work with small subjects such as...
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