Canon RF 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 346g body. Its quiet STM autofocus and customizable control ring add handling flexibility uncommon at this brightness. This lens is best for portrait and lifestyle photographers who prioritize dramatic bokeh and a lightweight walk-around prime.
Focal length 45mm
Aperture 16
Mount Canon RF
Weight 345 g
af type STM
lens type prime
56 Overall Score
Price ¥69,800
Snapshot
Pros & Cons
Pros
- Strong af (87th percentile) 87th
- Strong social proof (74th percentile) 74th
- Strong build (66th percentile) 66th
Cons
- Below average macro (22th percentile)
- Below average versatility (34th percentile)
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 held steady over time
Based on 35 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 | 16 |
| Min Aperture | 1.2 |
| Constant | No |
| Diaphragm Blades | 9 |
Build
| Mount | Canon RF |
| Format | Full-Frame |
| Weather Sealed | No |
| 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 RF RF45mm F1.2 STM 45mm | Sigma Contemporary 16-300mm f/3.5-6.7 DC OS | Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD | Nikon NIKKOR Z 28-400mm f/4-8 VR | Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 | Meike 50mm F1.8 Full Frame STM Auto Focus Prime |
|---|---|---|---|---|---|---|
| Focal Length | 45mm | 16-300mm | 18-300mm | 28-400mm | 50-200mm | 50mm |
| Max Aperture | 16 | f/3.5 | f/3.5 | f/4 | f/2.8 | f/1.8 |
| Mount | Canon RF | Sony E | Fuji X | Nikon Z | Micro Four Thirds | Sony E |
| Stabilization | false | true | true | true | true | true |
| Weather Sealed | false | true | false | true | true | false |
| Weight (g) | 345 | 615 | 92 | 726 | 655 | 369 |
| AF Type | STM | HLA | VXD linear motor | STM | linear motor | STM |
| Lens Type | prime | zoom | zoom | zoom | telephoto | Wide-Angle |
| Compare | Compare | Compare | Compare | Compare |
| Product | Af | Bokeh | Build | Macro | Optical | Aperture | Versatility | Social Proof | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| Canon RF RF45mm F1.2 STM 45mm | 86.9 | 44.8 | 66.4 | 22.1 | 49.1 | 49.5 | 34.2 | 74 | 36 |
| Sigma Contemporary 16-300mm f/3.5-6.7 DC OS Compare | 54.5 | 84.3 | 59 | 85.9 | 98.9 | 76.9 | 99.6 | 78 | 99.1 |
| Tamron Di III 18-300mm f/3.5-6.3 Di III-A VC VXD Compare | 98.3 | 74.9 | 96.6 | 87.7 | 74.6 | 76.9 | 99.2 | 83.1 | 81.3 |
| Nikon NIKKOR Z 28-400mm f/4-8 VR Compare | 86.9 | 77.8 | 51.6 | 81.3 | 97 | 71.2 | 98.9 | 83.1 | 98.3 |
| Panasonic LUMIX G Leica DG Vario-Elmarit H-ES50200 Compare | 98.3 | 86.1 | 55.3 | 23.1 | 95.9 | 83.7 | 88.3 | 65.9 | 96.4 |
| Meike 50mm F1.8 Full Frame STM Auto Focus Prime Compare | 86.9 | 96.1 | 63.7 | 95.6 | 39.6 | 92.8 | 34.2 | 50.2 | 81.3 |
Price
Value & Pricing
From ¥69,800
Amazon.co.jp 1 offers From ¥69,800
May 25, 2026 ¥69,800
Usage Scores
A full written review is coming soon. The specs, scores, prices and charts above are always up to date.
