Pentax smc Pentax-A 15mm f/3.5 vs Sigma 15mm f/2.8 EX DG Diagonal Fisheye
Both are Pentax K lenses for full frame. Here is what actually differs.
Pick the Pentax smc Pentax-A 15mm f/3.5 if
Our spec data shows no clear advantage for this lens.
Pick the Sigma 15mm f/2.8 EX DG Diagonal Fisheye if
- You need ⅔ stop more light for low light or background blur (f/2.8 vs f/3.5)
- You shoot close-ups: it focuses down to 0.15 m vs 0.3 m
Spec differences
9 differences| Pentax smc Pentax-A 15mm f/3.5 | Sigma 15mm f/2.8 EX DG Diagonal Fisheye | |
|---|---|---|
| Brand |
Pentax
|
Sigma
|
| Type |
Prime
|
Fisheye
|
| Max aperture |
f/3.5
|
f/2.8
⅔ stop faster
|
| Weight |
not listed
|
370 g
|
| Min focus distance |
0.3 m
|
0.15 m
closer
|
| Max magnification |
not listed
|
0.26×
|
| Aperture blades |
not listed
|
7
|
| Optical design |
13 elements / 12 groups
|
7 elements / 6 groups
|
| Autofocus motor |
Manual focus
|
not listed
|
4 identical specs hidden: mount, format, focal length, image stabilization. Show all
- Mount
- Pentax K both
- Format
- Full frame both
- Focal length
- 15mm both
- Image stabilization
- No both
Our notes
Pentax smc Pentax-A 15mm f/3.5
Pentax smc Pentax-A 15mm f/3.5: a wide-angle prime lens with a 15mm focal length and a maximum aperture of f/3.5, made for Pentax K mount cameras. The wide view suits landscapes, architecture and environmental shots.
Our notes
Sigma 15mm f/2.8 EX DG Diagonal Fisheye
This 15mm f/2.8 full-frame fisheye lens from Sigma fits Pentax K mount cameras. It suits dramatic perspectives, astrophotography and creative wide-field work.
More comparisons
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focuses closer vs ⅓ stop faster
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focuses closer vs 1 stop faster
Sigma 15mm f/2.8 EX DG Diagonal Fisheye vs Zeiss Distagon T* 15mm f/2.8 ZE
Pentax smc Pentax-A 15mm f/3.5 vs Zeiss Distagon T* 15mm f/2.8 ZE
Zeiss Distagon T* 15mm f/2.8 ZE: ⅔ stop faster
Sigma 15mm f/2.8 EX DG Diagonal Fisheye vs Zeiss Distagon T* 15mm f/2.8 ZF.2
Pentax smc Pentax-A 15mm f/3.5 vs Zeiss Distagon T* 15mm f/2.8 ZF.2
Zeiss Distagon T* 15mm f/2.8 ZF.2: ⅔ stop faster