Canon RF45mm F1.2 STM vs TTARTISAN AF
Updated July 2026 — Canon RF45mm F1.2 STM wins on aperture and weight, TTARTISAN AF wins on portability and size.
The Canon RF45mm F1.2 STM excels in optical performance and low-light capabilities, while the TTARTISAN AF 27mm f2.8 offers portability and affordability.
Why Canon RF45mm F1.2 STM is better
Optical Quality
Superior low-light performance with f/1.2 aperture
Bokeh
Creates beautiful background blur for portraits
Build Quality
Durable design with advanced features
Why TTARTISAN AF is better
Price
66% cheaper than Canon
Portability
Ultra-compact pancake design
Ease of Use
Features like eye recognition focus
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | TTARTISAN AF |
|---|---|---|
| Aperture | f/1.2 | f/2.8 |
| Focusing | Smooth | STM Stepping Motor |
| Compatibility | Canon RF | Fuji X Mount |
| Price | $469.00 | $159.99 |
| Bokeh | Excellent | Good |
Dimension comparison
Overview of the Canon RF45mm F1.2 STM
The Canon RF45mm F1.2 STM is a standard prime lens that features a wide f/1.2 aperture. This lens is designed for creators who desire a compact setup without sacrificing performance. Priced at $469.00, it offers exceptional low-light capabilities and beautiful bokeh for isolating subjects.
This lens stands out with its large-diameter mount and short back focus, which contribute to its compact design and affordability for a large-diameter lens. With the ability to produce soft, expressive visuals, the Canon RF45mm F1.2 STM excels in capturing portraits and lifestyle content, making it an attractive option for both amateur and professional photographers.
Overview of the TTARTISAN AF 27mm f2.8
The TTARTISAN AF 27mm f2.8 is an ultra-compact pancake lens aimed at Fuji X mount cameras, priced at $159.99. This lens is about 66% cheaper than the Canon RF45mm, making it an appealing choice for budget-conscious photographers looking for portability and convenience.
The TTARTISAN lens features a small size, which enhances its travel-friendly design. It is equipped with a STM stepping motor for smooth focusing and includes modern features like eye recognition focus and a clicked aperture ring, allowing for a more efficient shooting experience. Its unique USB-C interface for firmware upgrades also sets it apart, providing a level of customization that can enhance performance over time.
Optical Performance
The Canon RF45mm F1.2 STM offers superior optical performance with its f/1.2 aperture, allowing for faster shutter speeds in low-light situations. This lens is particularly adept at creating images with a three-dimensional look, thanks to its large-diameter design that enables captivating bokeh.
On the other hand, the TTARTISAN AF 27mm f2.8, while compact and practical, does not match the low-light performance of the Canon. With its f/2.8 aperture, it provides a different aesthetic that may be less suitable for dramatic portrait work but is more versatile for everyday shooting. The optical quality remains strong, but it lacks the same depth of field control that the Canon offers.
Build Quality and Design
The Canon RF45mm F1.2 STM is designed for durability and performance, featuring a compact build that does not compromise on quality. Its design incorporates advanced features like digital distortion correction, which enhances image clarity across various shooting conditions.
Conversely, the TTARTISAN AF 27mm f2.8 boasts an ultra-compact pancake design that makes it extremely portable. Its lightweight nature is ideal for travel, but it may not feel as robust as the Canon lens. Nonetheless, the TTARTISAN lens offers a stylish and practical choice for photographers who prioritize ease of use and portability.
Focus Mechanism
The focus mechanism of the Canon RF45mm F1.2 STM is optimized for smooth and precise focusing, which is crucial for capturing high-quality images. While specific details on the focusing system are not provided, the lens is engineered to deliver exceptional performance, particularly in fast-paced shooting situations.
In comparison, the TTARTISAN AF 27mm f2.8 utilizes a STM stepping motor that facilitates smooth focusing, with added features like eye recognition focus for enhanced accuracy. This makes it a great option for capturing dynamic moments, though it may not match the responsiveness of higher-end systems.
Use Cases
The Canon RF45mm F1.2 STM shines in scenarios where low light and subject isolation are key. Its wide aperture is perfect for portrait photography, allowing for beautiful background blur and stunning subject focus. It is also suitable for lifestyle and narrative photography, where visual impact is paramount.
The TTARTISAN AF 27mm f2.8, with its compact size and versatility, is ideal for street photography and travel. It is lightweight enough to carry all day, making it a practical choice for capturing everyday moments. While it may not deliver the same artistic effects as the Canon, it offers a reliable option for general photography needs.
Price Comparison
The price difference between the Canon RF45mm F1.2 STM and the TTARTISAN AF 27mm f2.8 is significant, with the Canon lens retailing at $469.00 and the TTARTISAN priced at $159.99. This makes the TTARTISAN approximately 66% cheaper, making it an attractive option for those on a budget.
However, the price disparity reflects the differences in optical performance and features. While the Canon lens offers premium quality and advanced capabilities, the TTARTISAN provides a cost-effective solution that meets the needs of many photographers without the higher price tag.
Which should you buy?
Choosing between the Canon RF45mm F1.2 STM and the TTARTISAN AF 27mm f2.8 ultimately depends on your specific needs and budget. If you require exceptional low-light performance and are willing to invest in a premium lens, the Canon RF45mm is a clear choice with its advanced features and optical quality. However, if you are looking for an affordable, portable lens for everyday use and travel, the TTARTISAN AF 27mm provides excellent value without compromising on essential functionality.