On sale 9%
Canon RF45mm F1.2 STM 45mm
The f/1.2 maximum aperture delivers exceptionally shallow depth of field and strong low-light performance in a compact 345g body, enabled by Canon’s first PMo aspheric lens in this design. Its natural 45mm perspective pairs with a customizable control ring and smooth STM autofocus, offering an affordable entry to ultra-fast RF glass. This lens is best for portrait and lifestyle photographers who want dramatic bokeh and a natural field of view without the bulk or cost of larger f/1.2 primes.
Focal length 45mm
Aperture f/1.2
Mount Canon RF
Weather Sealed Yes
Weight 345 g
af type STM
lens type prime
71 Overall Score
Price $429
Snapshot
What owners think
How owner sentiment changed over time
ExclusiveBased on when customers actually wrote their reviews - so you can see whether early praise held up.
Owner sentiment has improved over time
72/100Our AI sentiment read▼6
Based on 21 dated customer reviews, grouped by calendar quarter. Period analysis is in English.
The proof
Performance
Specifications
Full Specifications
Optics
| Type | Prime |
| Focal Length Min | 45 |
| Focal Length Max | 45 |
| Elements | 9 |
| Groups | 7 |
| Aspherical Elements | 1 |
| Coating | SSC (Super Spectra Coating) |
Aperture
| Max Aperture | f/1.2 |
| Min Aperture | f/1.2 |
| Constant | No |
| Diaphragm Blades | 9 |
Build
| Mount | Canon RF |
| Format | full-frame |
| Weather Sealed | Yes |
| Weight | 0.3 kg / 0.8 lbs |
| Filter Thread | 67 |
AF & Stabilization
| AF Type | STM |
| Stabilization | No |
Focus
| Min Focus Distance | 450 |
| Max Magnification | 0.13x |
vs Competition
| Spec | Canon RF45mm F1.2 STM 45mm | Sigma Contemporary 18-50mm f/2.8 DC DN | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Nikon NIKKOR Z 17-28mm f/2.8 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E PZ 16-50mm f/3.5-5.6 OSS |
|---|---|---|---|---|---|---|
| Focal Length | 45mm | 18-50mm | 17-70mm | 17-28mm | 12-35mm | 16-50mm |
| Max Aperture | f/1.2 | f/2.8 | f/2.8 | f/2.8 | f/2.8 | f/3.5 |
| Mount | Canon RF | Sony E | Sony E | Nikon Z | Micro Four Thirds | Sony E |
| Stabilization | false | false | true | false | true | true |
| Weather Sealed | true | true | true | true | true | true |
| Weight (g) | 345 | 290 | 544 | 450 | 306 | 107 |
| AF Type | STM | stepping motor | RXD | Stepping Motor | Autofocus | Autofocus |
| Lens Type | prime | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | User Sentiment | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|---|
| Canon RF45mm F1.2 STM 45mm | 87.7 | 97.8 | 83.4 | 32.8 | 56.8 | 98.4 | 15.8 | 33.6 | 80.4 | 37.1 |
| Sigma Contemporary 18-50mm f/2.8 DC DN Compare | 87.7 | 81.3 | 86.6 | 90.9 | 82.5 | 83.5 | 80.2 | 78.5 | 89.5 | 37.1 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.7 | 86.6 | 69.7 | 85.1 | 91.1 | 83.5 | 63 | 89.5 | 85 | 82.8 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.7 | 86.6 | 76.1 | 85.1 | 88.4 | 83.5 | 90.7 | 68 | 68.8 | 37.1 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.7 | 81.3 | 85.9 | 50.6 | 86.8 | 83.5 | 63 | 80.4 | 85 | 97 |
| Sony E PZ 16-50mm f/3.5-5.6 OSS Compare | 53.7 | 74.7 | 98.6 | 43.7 | 69.2 | 76.8 | 63 | 83.2 | 80.4 | 93.6 |
