Sigma 100-400mm f/5-6.3 DG DN OS Contemporary vs Sony E 10-18mm f/4 OSS
The bottom line
These cover different focal lengths — the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary is 100-400mm, the Sony E 10-18mm f/4 OSS is 10-18mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary for super-telephoto, the Sony E 10-18mm f/4 OSS for wide-angle.
Choose the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary if…
- ✓You need more reach — it goes to 400mm vs 18mm for distant subjects, wildlife and sport.
- ✓You like close-focus work — 0.24x magnification vs 0.1x.
- ✓You work outdoors — it's weather-sealed against dust and moisture; the other isn't.
Choose the Sony E 10-18mm f/4 OSS if…
- ✓You want more light and background blur — f/4 is faster than f/5, better for low light and subject separation.
- ✓You shoot wide — it starts at 10mm vs 100mm for landscapes, interiors and architecture.
- ✓You value portability — at 225g (7.9 oz) it's lighter than the 1140g (2.51 lb) alternative for travel and all-day carry.
Where they differ
- ›Aperture: the Sony E 10-18mm f/4 OSS opens to f/4 vs the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary's f/5 — more light and shallower depth-of-field.
- ›Focal range: Sigma 100-400mm f/5-6.3 DG DN OS Contemporary is 100-400mm, Sony E 10-18mm f/4 OSS is 10-18mm — different framing and reach.
- ›Weight: the Sony E 10-18mm f/4 OSS is 225g (7.9 oz) vs 1140g (2.51 lb) — you'll feel the difference handheld.
- ›Durability: the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary is weather-sealed; the other isn't.
Frequently asked
Is the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary or the Sony E 10-18mm f/4 OSS better?
These cover different focal lengths — the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary is 100-400mm, the Sony E 10-18mm f/4 OSS is 10-18mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary for super-telephoto, the Sony E 10-18mm f/4 OSS for wide-angle.
Who should choose the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary?
Choose the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary if you need more reach — it goes to 400mm vs 18mm for distant subjects, wildlife and sport. Choose it if you like close-focus work — 0.24x magnification vs 0.1x. Choose it if you work outdoors — it's weather-sealed against dust and moisture; the other isn't.
Who should choose the Sony E 10-18mm f/4 OSS?
Choose the Sony E 10-18mm f/4 OSS if you want more light and background blur — f/4 is faster than f/5, better for low light and subject separation. Choose it if you shoot wide — it starts at 10mm vs 100mm for landscapes, interiors and architecture. Choose it if you value portability — at 225g (7.9 oz) it's lighter than the 1140g (2.51 lb) alternative for travel and all-day carry.
What is the main difference between the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary and the Sony E 10-18mm f/4 OSS?
Aperture: the Sony E 10-18mm f/4 OSS opens to f/4 vs the Sigma 100-400mm f/5-6.3 DG DN OS Contemporary's f/5 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 100-400mm | 10-18mm |
| Lens Type | Zoom | Zoom |
| Optical Elements | 22 | 12 |
| Optical Groups | 16 | 11 |
| Aperture & Iris | ||
| Maximum Aperture | f/5 | f/4 |
| Minimum Aperture | f/32 | f/22 |
| Aperture Blades | 9 | 7 |
| Rounded Aperture | Yes | No |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | APS-C |
| Lens Mount | Sony E | Sony E |
| Angle of View | 24° – 6° | 110° – 76° |
| 35mm Equivalent | − | 15-27mm |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | HLA | Stepping |
| Focus Limiter | Yes | No |
| AF/MF Switch | Yes | No |
| Min Focus Distance | 120 cm | 25 cm |
| Max Magnification | 0.24x | 0.1x |
| Stabilization & Video | ||
| Optical Stabilization | Yes | Yes |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $759 | $749 |
| Filter Size | 67mm | 62mm |
| Diameter | 86mm | 70.8mm |
| Length | 196.6mm | 63.8mm |
| Weight | 1140g (2.51 lb) | 225g (7.9 oz) |
| Weather Sealed | Yes | No |
| Tripod Collar | No | No |
