Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM vs Sigma 8-16mm f/4.5-5.6 DC HSM
Both are Pentax K lenses for APS-C. Here is what actually differs.
Pick the Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM if
- You need 1⅓ stops more light for low light or background blur (f/2.8 vs f/4.5)
- You need more reach: 50mm vs 16mm at the long end
- Our notes say it suits: Events on APS-C, portraits, general professional use
Pick the Sigma 8-16mm f/4.5-5.6 DC HSM if
- You want a wider view: 8mm vs 16mm at the wide end
- You shoot close-ups: it focuses down to 0.24 m vs 0.3 m
Spec differences
13 differences| Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM | Sigma 8-16mm f/4.5-5.6 DC HSM | |
|---|---|---|
| Brand |
Pentax
|
Sigma
|
| Type |
Zoom
|
Wide Zoom
|
| Focal length |
16-50mm
|
8-16mm
|
| Max aperture |
f/2.8
1⅓ stops faster
|
f/4.5
|
| Weight |
565 g
|
not listed
|
| Length |
99 mm
|
not listed
|
| Diameter |
84 mm
|
not listed
|
| Filter thread |
77 mm
|
not listed
|
| Min focus distance |
0.3 m
|
0.24 m
closer
|
| Max magnification |
not listed
|
0.13×
|
| Aperture blades |
not listed
|
7
|
| Optical design |
not listed
|
15 elements / 11 groups
|
| Autofocus motor |
not listed
|
HSM
|
3 identical specs hidden: mount, format, image stabilization. Show all
- Mount
- Pentax K both
- Format
- APS-C both
- Image stabilization
- No both
Our notes
Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM
A constant f/2.8 standard zoom for Pentax APS-C bodies, with SDM focusing. It weighs about 565 g and takes 77mm filters.
Pros
- Constant f/2.8
- SDM autofocus
- Weather-resistant build
- 77mm filters
Cons
- APS-C only
- SDM motors in some units have failed with age
- No lens stabilization
Our notes
Sigma 8-16mm f/4.5-5.6 DC HSM
More comparisons
Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM vs Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical (IF)
wider (16mm) vs everyday APS-C shooting
Tokina AT-X 124 PRO DX 12-24mm f/4 vs Sigma 8-16mm f/4.5-5.6 DC HSM
⅓ stop faster vs wider (8mm)
Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM vs Sigma 17-50mm f/2.8 EX DC OS HSM
wider (16mm) vs stabilized
Pentax smc Pentax-DA Fish-Eye 10-17mm f/3.5-4.5 ED IF vs Sigma 8-16mm f/4.5-5.6 DC HSM
⅔ stop faster vs wider (8mm)
Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM vs Sigma 24-70mm f/2.8 DG OS HSM Art
wider (16mm) vs more reach (70mm)
Pentax smc DA* 16-50mm F2.8 ED AL (IF) SDM vs Tamron SP 15-30mm f/2.8 Di VC USD
more reach (50mm) vs wider (15mm)