Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens vs TTArtisan AF
Updated July 2026 — Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens wins on price and build, TTArtisan AF wins on focal length.
The Canon RF50mm F1.8 STM lens offers superior optical performance and compatibility with the EOS R system, while the TTArtisan AF 56mm F1.8 provides excellent value for budget-conscious photographers.
Why Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens is better
Optical Performance
Canon lens has advanced coatings and features for better image quality.
Compatibility
Designed specifically for Canon EOS R series cameras.
Low-Light Performance
Canon lens minimizes ghosting and flare effectively.
Why TTArtisan AF is better
Price
TTArtisan lens is significantly cheaper.
Build Quality
Metal construction gives a premium feel.
Eye Tracking
TTArtisan includes eye recognition focus technology.
Overall score
Specifications
| Spec | Canon RF50mm F1.8 STM Lens, Fixed Focal Length Prime Lens | TTArtisan AF |
|---|---|---|
| Brand | Canon | TTARTISAN |
| Aperture | f/1.8 | f/1.8 |
| Weight | 0.5 lbs | 0.4 lbs |
| Compatibility | EOS R | Sony E-Mount |
| Focal Length | 50mm | 56mm |
Dimension comparison
Overview of the Canon RF50mm F1.8 STM Lens
The Canon RF50mm F1.8 STM lens is a high-quality prime lens designed for EOS R series mirrorless cameras. Priced at $219.00, it offers a large f/1.8 aperture, making it ideal for low-light photography and providing beautiful background blur. This lens is compact and lightweight, enhancing its portability for photographers on the go. The stepping motor technology ensures smooth and quiet autofocus, which is particularly beneficial for video recording. With optimized lens placement and coatings, it minimizes ghosting and flare, delivering impressive color balance in your images.
Overview of the TTArtisan AF 56mm F1.8 Auto Focus Lens
The TTArtisan AF 56mm F1.8 Auto Focus lens is priced at $129.00, making it about 41% cheaper than the Canon option. This lens is specifically compatible with Sony E-mount mirrorless cameras. It features a large f/1.8 aperture as well, allowing for excellent low-light performance and soft bokeh effects. The lens incorporates a stepping motor for smooth focusing and includes eye recognition focus technology, making it easier to capture sharp images and videos. The metal barrel and mount enhance durability while maintaining a stylish retro aesthetic.
Design and Build Quality
The Canon RF50mm F1.8 STM lens boasts a compact and lightweight design that makes it easy to handle and transport. Its fixed focal length encourages creativity in composition, while the design is optimized for the EOS R system, ensuring a seamless fit with various camera bodies. In contrast, the TTArtisan AF 56mm F1.8 features a robust construction made from aviation aluminum, providing a premium feel and aesthetic. The design includes a unique firmware upgrade interface on the back cap, enhancing both functionality and style. Although both lenses are well-constructed, the metal build of the TTArtisan may appeal more to users seeking durability and a vintage look.
Performance in Low-Light Conditions
When it comes to low-light performance, both lenses shine with their f/1.8 maximum aperture. The Canon RF50mm F1.8 is designed to excel in various lighting conditions, producing sharp images with minimal noise due to its optimized lens coatings that reduce ghosting and flare. On the other hand, the TTArtisan AF 56mm F1.8 also performs admirably in low light, allowing more light to enter the camera and creating beautiful background blur. While both lenses are effective, the Canon's advanced optical features may provide a slight edge in demanding situations.
Autofocus Capabilities
The Canon RF50mm F1.8 STM lens features a stepping motor (STM) that ensures smooth and quiet autofocus, making it suitable for both photography and video work. This is especially useful for those who frequently shoot in quiet environments or capture video content. Conversely, the TTArtisan AF 56mm F1.8 also utilizes a stepping motor, but it includes eye recognition focus technology, which enhances its ability to track subjects, particularly portraits. This feature allows for accurate and agile focusing, making it a compelling choice for portrait photographers.
Versatility in Photography
Both lenses offer versatility, but they cater to slightly different needs. The Canon RF50mm F1.8 is a true 50mm lens, ideal for a range of applications from portraits to landscapes, thanks to its fixed focal length that encourages creative composition. The TTArtisan AF 56mm F1.8, while slightly longer in focal length, is similarly versatile but particularly excels in portrait photography due to its eye tracking capabilities. Depending on your specific photography style, either lens can serve well, but the choice may sway based on your preference for focal length and autofocus features.
Price Comparison
The Canon RF50mm F1.8 STM lens is priced at $219.00, whereas the TTArtisan AF 56mm F1.8 is significantly cheaper at $129.00. This makes the TTArtisan lens about 41% less expensive than its Canon counterpart. For budget-conscious photographers or those just beginning to explore photography, the lower price point of the TTArtisan may be more appealing. However, the Canon lens may justify its higher price with superior optical performance and compatibility with the EOS R system, making it a worthwhile investment for serious Canon users.
Which should you buy?
Choosing between the Canon RF50mm F1.8 STM lens and the TTArtisan AF 56mm F1.8 ultimately depends on your specific needs as a photographer. If you're invested in the Canon EOS R system and prioritize high optical performance, the Canon lens is an excellent choice despite its higher price. However, if you're looking for a budget-friendly option with solid performance, especially for portrait photography, the TTArtisan lens offers great value at a significantly lower price. Both lenses have their strengths, so consider your shooting style and camera compatibility before making a decision.

