Canon RF45mm F1.2 STM vs OM SYSTEM Olympus M.Zuiko Digital 40-
Updated July 2026 — Canon RF45mm F1.2 STM wins on price and build, OM SYSTEM Olympus M.Zuiko Digital 40- wins on aperture and zoom.
The Canon RF45mm F1.2 STM excels in low-light performance and image quality, while the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R offers versatility at a lower price.
Why Canon RF45mm F1.2 STM is better
Image Quality
Superior low-light performance with f/1.2 aperture
Build Quality
Robust design with professional features
Autofocus
Faster and more accurate autofocus in low light
Why OM SYSTEM Olympus M.Zuiko Digital 40- is better
Price
Significantly cheaper at $175.99
Versatility
3.75x zoom range for various photography styles
Weight
Lighter and more portable design
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | OM SYSTEM Olympus M.Zuiko Digital 40- |
|---|---|---|
| Focal Length | 45mm | 40-150mm |
| Max Aperture | f/1.2 | f/4.0-5.6 |
| Image Stabilization | No | No |
| Autofocus Type | Fast AF | High-Speed AF |
| Compatibility | Canon RF | Micro Four Thirds |
Dimension comparison
Overview of the Canon RF45mm F1.2 STM
The Canon RF45mm F1.2 STM is a standard prime lens that excels in low-light conditions due to its impressive f/1.2 aperture. This lens is designed to deliver exceptional image quality and a beautiful bokeh effect, making it ideal for portraits and lifestyle photography.
The RF45mm F1.2 STM features a compact design, enhanced by a large-diameter mount and short back focus. It combines digital distortion correction to maintain image clarity while offering an expressive three-dimensional look. This lens is priced at $469.00, providing a premium option for photographers looking to elevate their craft with a high-performance lens.
Overview of the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R
The OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R is a versatile zoom lens that is particularly suitable for Micro Four Thirds system cameras. With a focal length range of 40-150mm and a maximum aperture of f/4.0-5.6, this lens offers flexibility for various photography styles.
Priced at $175.99, the M.Zuiko Digital 40-150mm lens is considerably more affordable than the Canon RF45mm. It provides a 3.75x zoom capability, making it a practical choice for those looking to capture a wide range of subjects, from landscapes to portraits, without the need for multiple lenses.
Image Quality Comparison
When it comes to image quality, the Canon RF45mm F1.2 STM stands out with its f/1.2 aperture that allows for faster shutter speeds and exceptional low-light performance. This lens is designed to minimize aberrations and produce sharp images, making it an excellent choice for professional photographers.
In contrast, the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R, while versatile, has a maximum aperture of f/4.0-5.6. This limits its low-light capabilities compared to the Canon lens. However, it does provide a solid image quality for everyday photography, making it a reliable option for enthusiasts.
Versatility in Usage
The Canon RF45mm F1.2 STM is primarily a prime lens, which means it is fixed at 45mm. This can be limiting for some users who prefer the flexibility of zoom lenses. Nevertheless, its wide aperture makes it incredibly versatile for portrait photography, allowing for artistic effects and subject isolation.
On the other hand, the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R offers a significant advantage in versatility with its 3.75x zoom range. This makes it suitable for a variety of shooting scenarios, from capturing distant subjects to wide-angle landscapes. For users who value flexibility, this lens may be the better choice.
Price Consideration
The price difference between these two lenses is substantial. The Canon RF45mm F1.2 STM is priced at $469.00, whereas the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R is available for $175.99. This places the Olympus lens about 62% cheaper than the Canon lens, making it an attractive option for budget-conscious photographers.
For those just starting out or looking for a more economical choice without sacrificing too much on quality, the Olympus lens provides a compelling alternative to the more expensive Canon model.
Build Quality and Design
The Canon RF45mm F1.2 STM is designed with a large-diameter mount, contributing to its robust build quality and professional appearance. Its compact size makes it easy to carry, while still providing high-end performance characteristics that professionals expect from Canon lenses.
In comparison, the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R also features a portable design that enhances its usability for everyday photography. However, it is inherently less premium than the Canon, reflecting its lower price point. The design is practical and user-friendly, making it suitable for both amateur and experienced photographers alike.
Autofocus Performance
The Canon RF45mm F1.2 STM uses advanced technology to achieve fast and accurate autofocus, which is crucial for capturing fleeting moments in dynamic environments. Its performance in low-light conditions is enhanced by the lens's wide aperture, allowing users to maintain focus even in challenging lighting.
Conversely, the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R features High-Speed Imager AF (MSC), which offers decent autofocus capabilities. While it may not match the speed of the Canon lens, it still provides reliable performance suitable for a wide range of shooting situations.
Which should you buy?
Choosing between the Canon RF45mm F1.2 STM and the OM SYSTEM Olympus M.Zuiko Digital 40-150mm F4.0-5.6 R ultimately depends on your specific photography needs and budget. The Canon lens is ideal for those who prioritize low-light performance and image quality, making it perfect for professional or serious hobbyist photographers. However, its higher price may be a deterrent for some.
On the other hand, the Olympus lens is significantly more affordable, making it a great choice for casual photographers or those just starting in the field. Its versatility as a zoom lens allows for a broader range of photographic opportunities, albeit with some trade-offs in low-light performance. Ultimately, if you seek premium quality and performance, go with the Canon; if you need versatility at a lower price, the Olympus is the way to go.

