Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) vs Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z)
The bottom line
These cover different focal lengths — the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) is 56mm, the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) is 70-300mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) for short-telephoto / portrait, the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) for super-telephoto.
Choose the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) if…
- ✓You want more light and background blur — f/1.4 is faster than f/4.5, better for low light and subject separation.
- ✓You prefer a fast, compact single focal length — a 56mm prime over a zoom.
- ✓You value portability — at 280g (9.9 oz) it's lighter than the 545g (1.20 lb) alternative for travel and all-day carry.
Choose the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) if…
- ✓You need more reach — it goes to 300mm vs 56mm for distant subjects, wildlife and sport.
- ✓You want one-lens flexibility — a 70-300mm zoom covers what the fixed 56mm can't reframe.
- ✓You like close-focus work — 0.32x magnification vs 0.1x.
Where they differ
- ›Aperture: the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) opens to f/1.4 vs the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z)'s f/4.5 — more light and shallower depth-of-field.
- ›Focal range: Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) is 56mm, Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) is 70-300mm — different framing and reach.
- ›Type: the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) is a zoom (flexible framing), the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) a prime (one focal length, usually brighter and lighter).
- ›Close-up: the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) reaches 0.32x magnification vs 0.1x — more for close-up and macro work.
- ›Weight: the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) is 280g (9.9 oz) vs 545g (1.20 lb) — you'll feel the difference handheld.
Frequently asked
Is the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) or the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) better?
These cover different focal lengths — the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) is 56mm, the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) is 70-300mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) for short-telephoto / portrait, the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) for super-telephoto.
Who should choose the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z)?
Choose the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) if you want more light and background blur — f/1.4 is faster than f/4.5, better for low light and subject separation. Choose it if you prefer a fast, compact single focal length — a 56mm prime over a zoom. Choose it if you value portability — at 280g (9.9 oz) it's lighter than the 545g (1.20 lb) alternative for travel and all-day carry.
Who should choose the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z)?
Choose the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z) if you need more reach — it goes to 300mm vs 56mm for distant subjects, wildlife and sport. Choose it if you want one-lens flexibility — a 70-300mm zoom covers what the fixed 56mm can't reframe. Choose it if you like close-focus work — 0.32x magnification vs 0.1x.
What is the main difference between the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) and the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z)?
Aperture: the Sigma 56mm f/1.4 DC DN Contemporary (Nikon Z) opens to f/1.4 vs the Tamron 70-300mm f/4.5-6.3 Di III RXD (Nikon Z)'s f/4.5 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 56mm | 70-300mm |
| Lens Type | Prime | Zoom |
| Optical Elements | 10 | 14 |
| Optical Groups | 8 | 10 |
| Aperture & Iris | ||
| Maximum Aperture | f/1.4 | f/4.5 |
| Minimum Aperture | f/16 | f/32 |
| Aperture Blades | 9 | 9 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | APS-C | Full-Frame |
| Lens Mount | Nikon Z | Nikon Z |
| Angle of View | 28° | 34° – 8° |
| 35mm Equivalent | 85-85mm | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | HLA | RXD |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 50 cm | 80 cm |
| Max Magnification | 0.1x | 0.32x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | Yes | No |
| Declickable Aperture | Yes | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $449 | $449 |
| Filter Size | 55mm | 67mm |
| Diameter | 67.2mm | 74.4mm |
| Length | 59.5mm | 148.3mm |
| Weight | 280g (9.9 oz) | 545g (1.20 lb) |
| Weather Sealed | No | No |
| Tripod Collar | No | No |
