


The RF45mm F1.2 STM lens is a great option for creators who want an affordable and lightweight setup. It delivers wide-aperture performance, stunning low-light results, and soft, expressive imagery. Whether you’re taking portraits, lifestyle content, or everyday stories, it’ll give your work a polished look, even straight from the camera.
The RF45mm F1.2 STM combines a large RF mount with a short back focus and advanced digital correction. A compact, affordable lens that still delivers the stunning F1.2 performance you expect.
The wide f/1.2 aperture creates stunning bokeh, making subjects pop with a three-dimensional effect. And thanks to the fast aperture, it shines in low light, allowing you to capture action at faster shutter speeds.
Canon’s first use of a PMo aspheric lens in an F1.2 design helps minimize aberrations for sharper, more accurate images. Combined with the RF mount’s large diameter and short back focus, this allows for a compact build without sacrificing optical performance.
The RF45mm F1.2 STM uses a gear-type STM motor paired with a magnetic detection system for smooth, precise autofocus. This keeps the lens compact and lightweight while ensuring your subject stays sharp, even in challenging lighting or fast-paced shooting.

| Lens Min. Focus Distance | From Camera Sensor: 1.5' / 45 cm |
| Lens Filter Size | 67 mm (Front) |
| Minimum Aperture | f/16 |
| Angle of View (diagonal) | 51° 20' |
| Maximum Aperture | f/1.2 |
| Focus Type | Autofocus |
| Mount Type | Canon RF |
| Focal Length | 45mm |
| Weight | 12.2 oz / 346 g |
| Dimensions | ø: 3.1 x L: 3" / ø: 78 x L: 75 mm |
| Image Stabilization | No |
| Diaphragm Blades | 9 |
| Maximum Magnification | 1:7.7 Macro Reproduction Ratio 0.13x Magnification |
| Optical Design | 9 Elements in 7 Groups |