Sigma 12mm F1.4 DC Contemporary (Fujifilm X) vs Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X)
The bottom line
These cover different focal lengths — the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) is 12mm, the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) is 18-300mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) for wide-angle, the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) for super-telephoto.
Choose the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) if…
- ✓You want more light and background blur — f/1.4 is faster than f/3.5, better for low light and subject separation.
- ✓You shoot wide — it starts at 12mm vs 18mm for landscapes, interiors and architecture.
- ✓You prefer a fast, compact single focal length — a 12mm prime over a zoom.
- ✓You value portability — at 225g (7.9 oz) it's lighter than the 620g (1.37 lb) alternative for travel and all-day carry.
Choose the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) if…
- ✓You need more reach — it goes to 300mm vs 12mm for distant subjects, wildlife and sport.
- ✓You want one-lens flexibility — a 18-300mm zoom covers what the fixed 12mm can't reframe.
- ✓You shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't.
- ✓You like close-focus work — 0.5x magnification vs 0.1x.
Where they differ
- ›Aperture: the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) opens to f/1.4 vs the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X)'s f/3.5 — more light and shallower depth-of-field.
- ›Focal range: Sigma 12mm F1.4 DC Contemporary (Fujifilm X) is 12mm, Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) is 18-300mm — different framing and reach.
- ›Type: the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) is a zoom (flexible framing), the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) a prime (one focal length, usually brighter and lighter).
- ›Stabilisation: only the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) has optical stabilisation — steadier handheld shots, especially on bodies without IBIS.
- ›Close-up: the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) reaches 0.5x magnification vs 0.1x — more for close-up and macro work.
- ›Weight: the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) is 225g (7.9 oz) vs 620g (1.37 lb) — you'll feel the difference handheld.
Frequently asked
Is the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) or the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) better?
These cover different focal lengths — the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) is 12mm, the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) is 18-300mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) for wide-angle, the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) for super-telephoto.
Who should choose the Sigma 12mm F1.4 DC Contemporary (Fujifilm X)?
Choose the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) if you want more light and background blur — f/1.4 is faster than f/3.5, better for low light and subject separation. Choose it if you shoot wide — it starts at 12mm vs 18mm for landscapes, interiors and architecture. Choose it if you prefer a fast, compact single focal length — a 12mm prime over a zoom. Choose it if you value portability — at 225g (7.9 oz) it's lighter than the 620g (1.37 lb) alternative for travel and all-day carry.
Who should choose the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X)?
Choose the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X) if you need more reach — it goes to 300mm vs 12mm for distant subjects, wildlife and sport. Choose it if you want one-lens flexibility — a 18-300mm zoom covers what the fixed 12mm can't reframe. Choose it if you shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't. Choose it if you like close-focus work — 0.5x magnification vs 0.1x.
What is the main difference between the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) and the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X)?
Aperture: the Sigma 12mm F1.4 DC Contemporary (Fujifilm X) opens to f/1.4 vs the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD (Fuji X)'s f/3.5 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 12mm | 18-300mm |
| Lens Type | Prime | Zoom |
| Optical Elements | 14 | 19 |
| Optical Groups | 12 | 13 |
| Aperture & Iris | ||
| Maximum Aperture | f/1.4 | f/3.5 |
| Minimum Aperture | f/16 | f/32 |
| Aperture Blades | 9 | 7 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | APS-C | APS-C |
| Lens Mount | Fujifilm X | Fujifilm X |
| Angle of View | 99.6° | 76° – 5° |
| 35mm Equivalent | 18-18mm | 27-450mm |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | HLA | VXD |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | No |
| Min Focus Distance | 17 cm | 19 cm |
| Max Magnification | 0.1x | 0.5x |
| Stabilization & Video | ||
| Optical Stabilization | No | Yes |
| Aperture Ring | Yes | No |
| Declickable Aperture | Yes | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $629 | $649 |
| Filter Size | 62mm | 67mm |
| Diameter | 68mm | 75mm |
| Length | 69mm | 125.6mm |
| Weight | 225g (7.9 oz) | 620g (1.37 lb) |
| Weather Sealed | Yes | No |
| Tripod Collar | No | No |
