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Canon RF vs Canon RF45mm F1.2 STM

Updated July 2026 — Canon RF wins on weight and versatility, Canon RF45mm F1.2 STM wins on price and bokeh.

The Canon RF 50mm F1.8 STM Lens offers great value for budget-conscious photographers, while the RF45mm F1.2 STM excels in professional quality and low-light performance.

Why Canon RF is better

Price

RF 50mm is $219.00, significantly cheaper than RF45mm at $469.00.

Weight

RF 50mm is compact and lightweight, ideal for portability.

Versatility

RF 50mm is versatile for various photography styles.

Why Canon RF45mm F1.2 STM is better

Aperture

RF45mm has a larger f/1.2 aperture for better low-light performance.

Image Quality

RF45mm provides superior image quality with advanced optics.

Bokeh

RF45mm creates exceptional bokeh effects for professional portraits.

Overall score

Canon RF
75
Canon RF45mm F1.2 STM
90

Specifications

SpecCanon RFCanon RF45mm F1.2 STM
BrandCanonCanon
Focal Length50mm45mm
MountRFRF
MotorSTMPMo
CoatingSuper SpectraDigital Correction

Dimension comparison

Canon RFCanon RF45mm F1.2 STM

Overview of Canon RF 50mm F1.8 STM Lens and Canon RF45mm F1.2 STM

The Canon RF 50mm F1.8 STM Lens is priced at $219.00, making it about 17% cheaper than the Canon RF45mm F1.2 STM, which retails for $469.00. This price difference highlights a significant factor for buyers considering their options. Each lens caters to different photography needs and styles, with the former focusing on affordability and versatility while the latter emphasizes high-end performance and advanced capabilities.

Design and Build Quality

The Canon RF 50mm F1.8 STM Lens is designed to be compact and lightweight, making it an excellent choice for photographers who prioritize portability. It features an RF mount and an aspheric lens element, ensuring quality images without adding bulk. Conversely, the Canon RF45mm F1.2 STM offers a larger diameter mount and a short back focus, making it compact for an f/1.2 lens. Both lenses are well-engineered, but the RF45mm’s advanced design caters to a more specialized audience seeking premium optics.

Aperture Performance

The Canon RF 50mm F1.8 STM Lens has a wide f/1.8 aperture, allowing for decent low-light performance and beautiful background blur. This makes it suitable for portraits and a variety of creative photography applications. In contrast, the Canon RF45mm F1.2 STM boasts a significantly larger f/1.2 aperture, which not only enhances low-light capabilities but also offers superior bokeh effects. This difference in aperture size can be crucial for photographers aiming for a three-dimensional look in their images.

Autofocus Capabilities

When it comes to autofocus, the Canon RF 50mm F1.8 STM Lens employs an STM motor that ensures smooth, fast, and nearly silent focusing. This feature is essential for capturing spontaneous moments without disruption. On the other hand, the Canon RF45mm F1.2 STM is engineered with an effective placement of a PMo aspheric lens, which helps reduce aberrations. While both lenses provide good autofocus performance, the RF45mm’s advanced optics give it an edge in terms of precision and image quality.

Image Quality

Image quality is a distinguishing factor between these two lenses. The Canon RF 50mm F1.8 STM lens delivers sharp images with a pleasing background blur, making it versatile for various photography styles. However, the Canon RF45mm F1.2 STM lens takes it a step further with its advanced optical design, which allows for exceptional low-light imagery and soft visuals. The RF45mm excels in isolating subjects from the background, making it a compelling choice for professional photographers focused on high-quality portraits.

Versatility

The Canon RF 50mm F1.8 STM Lens is touted as a versatile option, ideal for photographers looking to explore a wide range of creative avenues without breaking the bank. It can handle everything from portraits to landscapes effectively. In contrast, the Canon RF45mm F1.2 STM lens is designed for users who require a specialized tool for high-end photography. While it is a fantastic lens for portraits and lifestyle shots, its higher price point may limit its appeal to casual photographers.

Price Comparison

The price disparity between the two lenses is quite significant, with the Canon RF 50mm F1.8 STM Lens at $219.00 and the Canon RF45mm F1.2 STM at $469.00. This means that the RF 50mm is approximately 17% cheaper. For those on a budget or starting their photography journey, the RF 50mm offers considerable value. Meanwhile, the RF45mm justifies its higher price with advanced features and superior image quality, making it a worthwhile investment for serious photographers.

Which should you buy?

Choosing between the Canon RF 50mm F1.8 STM Lens and the Canon RF45mm F1.2 STM ultimately depends on your photography needs and budget. If you are looking for an affordable, versatile lens that performs well in various scenarios, the RF 50mm is an excellent choice. However, if you prioritize high-quality optics and exceptional low-light performance for professional work, the RF45mm is worth the investment despite its higher price. Each lens serves its purpose, catering to different types of photographers in the market.