Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) vs Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF)
The bottom line
These cover different focal lengths — the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) is 10-18mm, the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) is 75mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) for wide-angle, the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) for short-telephoto / portrait.
Choose the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) if…
- ✓You shoot wide — it starts at 10mm vs 75mm for landscapes, interiors and architecture.
- ✓You want one-lens flexibility — a 10-18mm zoom covers what the fixed 75mm can't reframe.
- ✓You like close-focus work — 0.28x magnification vs 0.1x.
- ✓You work outdoors — it's weather-sealed against dust and moisture; the other isn't.
Choose the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) if…
- ✓You want more light and background blur — f/1.8 is faster than f/2.8, better for low light and subject separation.
- ✓You need more reach — it goes to 75mm vs 18mm for distant subjects, wildlife and sport.
- ✓You prefer a fast, compact single focal length — a 75mm prime over a zoom.
Where they differ
- ›Aperture: the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) opens to f/1.8 vs the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF)'s f/2.8 — more light and shallower depth-of-field.
- ›Focal range: Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) is 10-18mm, Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) is 75mm — different framing and reach.
- ›Type: the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) is a zoom (flexible framing), the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) a prime (one focal length, usually brighter and lighter).
- ›Durability: the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) is weather-sealed; the other isn't.
Frequently asked
Is the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) or the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) better?
These cover different focal lengths — the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) is 10-18mm, the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) is 75mm — so they're not really substitutes. Pick by the field of view you actually need: the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) for wide-angle, the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) for short-telephoto / portrait.
Who should choose the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF)?
Choose the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) if you shoot wide — it starts at 10mm vs 75mm for landscapes, interiors and architecture. Choose it if you want one-lens flexibility — a 10-18mm zoom covers what the fixed 75mm can't reframe. Choose it if you like close-focus work — 0.28x 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 Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF)?
Choose the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) if you want more light and background blur — f/1.8 is faster than f/2.8, better for low light and subject separation. Choose it if you need more reach — it goes to 75mm vs 18mm for distant subjects, wildlife and sport. Choose it if you prefer a fast, compact single focal length — a 75mm prime over a zoom.
What is the main difference between the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF) and the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF)?
Aperture: the Voigtlander PORTRAIT HELIAR 75mm f/1.8 (Canon RF) opens to f/1.8 vs the Sigma 10-18mm f/2.8 DC DN Contemporary (Canon RF)'s f/2.8 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 10-18mm | 75mm |
| Lens Type | Zoom | Prime |
| Optical Elements | 13 | 9 |
| Optical Groups | 10 | 7 |
| Aperture & Iris | ||
| Maximum Aperture | f/2.8 | f/1.8 |
| Minimum Aperture | f/22 | f/16 |
| Aperture Blades | 9 | 10 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | APS-C | Full-Frame |
| Lens Mount | Canon RF | Canon RF |
| Angle of View | 110° – 76° | 32° |
| 35mm Equivalent | 16-29mm | − |
| Focus | ||
| Autofocus | Yes | No |
| Focus Motor | HLA | − |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | No |
| Min Focus Distance | 12 cm | 75 cm |
| Max Magnification | 0.28x | 0.1x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | Yes | No |
| Declickable Aperture | Yes | No |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $699 | $699 |
| Filter Size | 67mm | 58mm |
| Diameter | 67.2mm | 64mm |
| Length | 73.3mm | 80mm |
| Weight | 260g (9.2 oz) | 280g (9.9 oz) |
| Weather Sealed | Yes | No |
| Tripod Collar | No | No |
