Canon RF45mm F1.2 STM vs Sony - FE
Updated July 2026 — Canon RF45mm F1.2 STM wins on price and weight, Sony - FE wins on size and aperture.
The Canon RF45mm F1.2 STM excels in low-light performance and bokeh quality, while the Sony FE 50mm F1.8 offers great value for budget-conscious photographers.
Why Canon RF45mm F1.2 STM is better
Aperture
Canon has a wider f/1.2 aperture for better low-light performance.
Bokeh
Canon produces superior bokeh due to its design.
Image Quality
Canon lens has advanced distortion correction and reduced aberrations.
Why Sony - FE is better
Price
Sony is significantly cheaper at $248.
Portability
Sony is more compact and lightweight.
Versatility
Sony is suitable for a range of subjects at a lower cost.
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | Sony - FE |
|---|---|---|
| Brand | Canon | Sony |
| Max Aperture | f/1.2 | f/1.8 |
| Lens Type | Prime | Prime |
| Weight (g) | 600 | 186 |
| Bokeh Quality | Excellent | Good |
| Price (USD) | 469.00 | 248.00 |
Dimension comparison
Overview of the Canon RF45mm F1.2 STM
The Canon RF45mm F1.2 STM is a standard prime lens priced at $469.00. This lens is designed for creators looking for a versatile and compact option that excels in low-light conditions. With its large-diameter mount and short back focus, it offers an impressive f/1.2 aperture, enabling faster shutter speeds in darker environments. The lens also features advanced digital distortion correction, which enhances image quality while reducing aberrations effectively. Canon's design allows for stunning bokeh effects, making it an excellent choice for portraits and lifestyle photography.
Overview of the Sony FE 50mm F1.8 Standard Lens
In contrast, the Sony FE 50mm F1.8 Standard Lens is available at a more budget-friendly price of $248.00. This lens is ideal for full-frame E-mount cameras and is well-suited for a variety of subjects, particularly portraiture. The F1.8 maximum aperture allows for beautiful defocusing effects, while the 7-blade circular aperture contributes to visually appealing bokeh. Despite its lower price point, this lens does not compromise on image quality, featuring aspherical elements that control spherical aberrations and reduce distortion.
Price Comparison
When comparing prices, the Canon RF45mm F1.2 STM is significantly more expensive than the Sony FE 50mm F1.8 by about $221.00, which represents a difference of approximately 89%. The Canon lens is priced at $469.00, while the Sony lens is available for $248.00. This substantial price gap may be a deciding factor for budget-conscious photographers who still seek quality in their equipment. While the Canon lens offers advanced features and greater aperture capabilities, the Sony lens provides excellent value for those who may not require such high-end specifications.
Aperture and Low-Light Performance
The Canon RF45mm F1.2 STM stands out with its impressive f/1.2 aperture, allowing for exceptional low-light performance and faster shutter speeds. This aperture enables photographers to capture stunning images in challenging lighting conditions while achieving a three-dimensional look through effective subject isolation. In comparison, the Sony FE 50mm F1.8, with its f/1.8 maximum aperture, still offers good low-light capabilities but falls short of the Canon's performance. Photographers prioritizing low-light photography and beautiful bokeh may find the Canon lens to be the superior option.
Image Quality and Bokeh
Both the Canon RF45mm F1.2 STM and the Sony FE 50mm F1.8 are designed to deliver high image quality, but they achieve this in different ways. The Canon lens features a large-diameter design, enabling it to produce a soft, expressive bokeh that enhances portrait shots. The effective placement of a PMo aspheric lens in the Canon model reduces aberrations, a first for Canon in a f/1.2 lens. On the other hand, the Sony lens utilizes a 7-blade circular aperture that contributes to its pleasing bokeh. While both lenses create beautiful defocused backgrounds, the Canon lens is likely to appeal to those seeking the highest level of creative control.
Size and Portability
When it comes to size and portability, the Sony FE 50mm F1.8 is the clear winner. Its compact and lightweight design makes it easy to carry, which is advantageous for photographers who are often on the move. The Canon RF45mm F1.2 STM, while still reasonably compact for a large-aperture lens, is bulkier due to its advanced features. This difference in weight and size may influence photographers who prioritize a lightweight setup for travel or daily use. For casual shooters or those who prefer a lens they can easily pack, the Sony lens may be more appealing.
Use Cases and Versatility
The Canon RF45mm F1.2 STM is particularly versatile, making it suitable for a range of photography styles, including portraits, lifestyle content, and everyday narratives. Its ability to produce captivating low-light imagery and impressive bokeh makes it an excellent choice for photographers looking to elevate their work. Conversely, the Sony FE 50mm F1.8, while also versatile, is especially well-suited for portraiture. Its slightly narrower aperture may limit its effectiveness in low-light scenarios compared to the Canon, but it still performs admirably in various situations.
Which should you buy?
Choosing between the Canon RF45mm F1.2 STM and the Sony FE 50mm F1.8 ultimately depends on your specific needs and budget. If you are looking for superior low-light performance, exceptional bokeh, and advanced features, the Canon lens is worth the investment despite its higher price of $469.00. However, if you are a budget-conscious photographer seeking a quality lens for general use, the Sony lens at $248.00 offers excellent value without sacrificing image quality. Assess your photography style and requirements to determine which lens best fits your creative vision.

