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Canon RF45mm F1.2 STM vs Sony FE 1.4x Teleconverter

Updated July 2026 — Canon RF45mm F1.2 STM wins on weight and length, Sony FE 1.4x Teleconverter wins on price and aperture.

The Canon RF45mm F1.2 STM is a superior choice for low-light photography and versatility, while the Sony FE 1.4x Teleconverter excels in extending focal lengths for specific lenses.

Why Canon RF45mm F1.2 STM is better

Price

Canon lens is $129 cheaper.

Low Light

Canon lens has a larger aperture for better low-light performance.

Versatility

Canon lens can be used standalone for various photography styles.

Why Sony FE 1.4x Teleconverter is better

Focal Length

Sony teleconverter extends focal length by 1.4x.

Build Quality

Sony teleconverter has dust and moisture resistance.

Compatibility

Sony teleconverter is designed for specific Sony lenses.

Overall score

Canon RF45mm F1.2 STM
88
Sony FE 1.4x Teleconverter
80

Specifications

SpecCanon RF45mm F1.2 STMSony FE 1.4x Teleconverter
Focal Length45mm1.4x
Aperturef/1.2Loss of 1 stop
CompatibilityAll camerasSony E-mount
Weight580g300g
Weather SealingNoYes

Dimension comparison

Canon RF45mm F1.2 STMSony FE 1.4x Teleconverter

Overview of the Canon RF45mm F1.2 STM

The Canon RF45mm F1.2 STM is priced at $469.00, making it an economical choice for photographers seeking a high-quality prime lens. This lens’s large f/1.2 aperture allows for exceptional low-light performance and beautiful bokeh, which is ideal for capturing portraits and lifestyle shots.

The RF45mm F1.2 STM is designed with creators in mind, offering a compact setup without compromising performance. Its digital distortion correction and effective placement of PMo aspheric lens work together to minimize aberrations, ensuring that images are sharp and clear. This lens is a great option for those looking to elevate their photography with a refined appearance right out of the camera.

Overview of the Sony FE 1.4x Teleconverter

The Sony FE 1.4x Teleconverter is priced at $598.00, representing a 27.5% higher cost compared to the Canon RF45mm F1.2 STM. This teleconverter is designed to extend the focal length of compatible lenses by 1.4x while maintaining full optical quality and autofocus performance.

Built for versatility, the teleconverter features a dust and moisture-resistant design, making it suitable for outdoor shooting. It is particularly useful for sports and wildlife photography, allowing photographers to capture distant subjects without sacrificing image quality. The impressive optical performance of the aspherical lens element ensures reliability in various shooting conditions.

Performance in Low Light

The Canon RF45mm F1.2 STM excels in low-light conditions thanks to its large f/1.2 aperture. This feature allows for faster shutter speeds, enabling users to capture stunning images even in dim environments. Photographers will appreciate the lens’s ability to isolate subjects from the background, creating a three-dimensional look through beautiful bokeh.

In contrast, the Sony FE 1.4x Teleconverter does experience a one-stop light loss when attached to a lens. This means that while it can extend the focal length, it may not perform as effectively in low-light scenarios compared to the Canon RF45mm F1.2 STM. For users primarily focused on low-light photography, the Canon lens offers superior capabilities.

Versatility and Use Cases

The Canon RF45mm F1.2 STM is a standard prime lens that works well for a variety of photography styles, including portraits and lifestyle content. Its compact design makes it easy to carry, making it an excellent choice for everyday shooting.

On the other hand, the Sony FE 1.4x Teleconverter is specifically designed for use with compatible Sony E-mount lenses, like the SEL70200GM and SEL100400GM. This teleconverter is ideal for sports and wildlife photographers who require extended reach without the bulk of additional lenses. While it enhances versatility for those using specific Sony lenses, it does not function as a standalone option like the Canon lens.

Build Quality and Design

The Canon RF45mm F1.2 STM is designed with a large-diameter mount and a short back focus, resulting in a compact yet robust lens. Its construction allows for excellent digital distortion correction, making it reliable for everyday use.

In comparison, the Sony FE 1.4x Teleconverter boasts a dust and moisture-resistant design, which significantly enhances its reliability in various shooting environments. This feature is crucial for outdoor photographers who need to protect their equipment from the elements. While both products are built for durability, the teleconverter's weather-sealing gives it an edge for outdoor use.

Price Comparison

At $469.00, the Canon RF45mm F1.2 STM is about 17% cheaper than the Sony FE 1.4x Teleconverter, which is priced at $598.00. For photographers on a budget or those who are just starting out, the Canon lens presents a more accessible option without sacrificing quality.

The price difference may influence which product to choose, particularly for those who are considering their first significant lens purchase. While the Sony teleconverter offers extended capabilities for specific lenses, the lower price of the Canon lens may make it more appealing for a wider range of photographers.

User Experience and Recommendations

Users of the Canon RF45mm F1.2 STM have noted its impressive image quality and ease of use, making it suitable for both amateurs and professionals. The ability to achieve beautiful bokeh and sharp images in low-light conditions has made it a favorite among portrait photographers.

Conversely, the Sony FE 1.4x Teleconverter is appreciated for its ability to maintain image quality while extending focal lengths. Photographers who frequently shoot sports or wildlife have found it to be an invaluable addition to their gear. However, it is essential to have compatible lenses to fully benefit from the teleconverter's capabilities.

Which should you buy?

Choosing between the Canon RF45mm F1.2 STM and the Sony FE 1.4x Teleconverter ultimately depends on your photography needs. If you are looking for a high-quality prime lens that excels in low-light conditions and offers versatility for various styles, the Canon lens is the better choice, especially given its lower price of $469.00.

On the other hand, if you own compatible Sony lenses and require additional reach for sports or wildlife photography, the Sony teleconverter, despite its higher price of $598.00, could be a worthwhile investment for extending your shooting capabilities. Each product has its strengths, but their effectiveness will largely depend on the specific needs of the photographer.