Canon RF 24-105mm f/2.8 L IS USM Z vs Canon RF45mm F1.2 STM
The bottom line
The Canon RF 24-105mm f/2.8 L IS USM Z is a zoom (24-105mm) and the Canon RF45mm F1.2 STM is a 45mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter (f/1.2 vs f/2.8) and lighter to carry. Choose flexibility or a fast single focal length.
Choose the Canon RF 24-105mm f/2.8 L IS USM Z if…
- ✓You need more reach — it goes to 105mm vs 45mm for distant subjects, wildlife and sport.
- ✓You shoot wide — it starts at 24mm vs 45mm for landscapes, interiors and architecture.
- ✓You want one-lens flexibility — a 24-105mm zoom covers what the fixed 45mm can't reframe.
- ✓You shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't.
Choose the Canon RF45mm F1.2 STM if…
- ✓You want more light and background blur — f/1.2 is faster than f/2.8, better for low light and subject separation.
- ✓You're on a budget — $469 vs $2,999 leaves more for other gear.
- ✓You prefer a fast, compact single focal length — a 45mm prime over a zoom.
- ✓You value portability — at 346g (12.2 oz) it's lighter than the 1330g (2.93 lb) alternative for travel and all-day carry.
Where they differ
- ›Aperture: the Canon RF45mm F1.2 STM opens to f/1.2 vs the Canon RF 24-105mm f/2.8 L IS USM Z's f/2.8 — more light and shallower depth-of-field.
- ›Focal range: Canon RF 24-105mm f/2.8 L IS USM Z is 24-105mm, Canon RF45mm F1.2 STM is 45mm — different framing and reach.
- ›Type: the Canon RF 24-105mm f/2.8 L IS USM Z is a zoom (flexible framing), the Canon RF45mm F1.2 STM a prime (one focal length, usually brighter and lighter).
- ›Price: the Canon RF45mm F1.2 STM is $469, $2,530 under the Canon RF 24-105mm f/2.8 L IS USM Z.
- ›Stabilisation: only the Canon RF 24-105mm f/2.8 L IS USM Z has optical stabilisation — steadier handheld shots, especially on bodies without IBIS.
- ›Weight: the Canon RF45mm F1.2 STM is 346g (12.2 oz) vs 1330g (2.93 lb) — you'll feel the difference handheld.
Frequently asked
Is the Canon RF 24-105mm f/2.8 L IS USM Z or the Canon RF45mm F1.2 STM better?
The Canon RF 24-105mm f/2.8 L IS USM Z is a zoom (24-105mm) and the Canon RF45mm F1.2 STM is a 45mm prime. The zoom gives you framing flexibility from one lens; the prime trades that for a fixed focal length that's usually brighter (f/1.2 vs f/2.8) and lighter to carry. Choose flexibility or a fast single focal length.
Who should choose the Canon RF 24-105mm f/2.8 L IS USM Z?
Choose the Canon RF 24-105mm f/2.8 L IS USM Z if you need more reach — it goes to 105mm vs 45mm for distant subjects, wildlife and sport. Choose it if you shoot wide — it starts at 24mm vs 45mm for landscapes, interiors and architecture. Choose it if you want one-lens flexibility — a 24-105mm zoom covers what the fixed 45mm can't reframe. Choose it if you shoot handheld or on an unstabilised body — it has optical stabilisation, the other doesn't.
Who should choose the Canon RF45mm F1.2 STM?
Choose the Canon RF45mm F1.2 STM if you want more light and background blur — f/1.2 is faster than f/2.8, better for low light and subject separation. Choose it if you're on a budget — $469 vs $2,999 leaves more for other gear. Choose it if you prefer a fast, compact single focal length — a 45mm prime over a zoom. Choose it if you value portability — at 346g (12.2 oz) it's lighter than the 1330g (2.93 lb) alternative for travel and all-day carry.
What is the main difference between the Canon RF 24-105mm f/2.8 L IS USM Z and the Canon RF45mm F1.2 STM?
Aperture: the Canon RF45mm F1.2 STM opens to f/1.2 vs the Canon RF 24-105mm f/2.8 L IS USM Z's f/2.8 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 24-105mm | 45mm |
| Lens Type | Zoom | Prime |
| Optical Elements | 23 | 9 |
| Optical Groups | 18 | 7 |
| Aperture & Iris | ||
| Maximum Aperture | f/2.8 | f/1.2 |
| Minimum Aperture | f/22 | f/16 |
| Aperture Blades | 11 | 9 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Canon RF | Canon RF |
| Angle of View | 84° – 23.5° | 51° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | Dual Nano USM | STM |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 45 cm | 45 cm |
| Max Magnification | 0.29x | 0.13x |
| Stabilization & Video | ||
| Optical Stabilization | Yes | No |
| Aperture Ring | No | No |
| Declickable Aperture | No | No |
| Parfocal | No | No |
| Internal Zoom | Yes | No |
| General | ||
| Price (MSRP) | $2,999 | $469 |
| Filter Size | 82mm | 67mm |
| Diameter | 88.5mm | 78mm |
| Length | 199mm | 75mm |
| Weight | 1330g (2.93 lb) | 346g (12.2 oz) |
| Weather Sealed | Yes | No |
| Tripod Collar | No | No |
