Canon RF45mm F1.2 STM vs TTARTISAN
Updated July 2026 — Canon RF45mm F1.2 STM wins on price and build, TTARTISAN wins on weight and autofocus.
The Canon RF45mm F1.2 STM excels in low-light performance and artistic capabilities, while the TTARTISAN 40mm f2 offers great portability and affordability.
Why Canon RF45mm F1.2 STM is better
Aperture
Canon has a wider f/1.2 aperture.
Image Quality
Canon provides superior bokeh and low-light performance.
Versatility
Canon is better for artistic expression.
Why TTARTISAN is better
Price
TTARTISAN is significantly cheaper.
Weight
TTARTISAN is ultra-portable at 167g.
Autofocus
TTARTISAN features advanced autofocus capabilities.
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | TTARTISAN |
|---|---|---|
| Brand | Canon | TTARTISAN |
| Focal Length | 45mm | 40mm |
| Max Aperture | f/1.2 | f/2 |
| Material | Plastic/Metal | Aerospace Aluminum |
| Focus Type | Manual/Auto | Auto |
Dimension comparison
Overview
When it comes to prime lenses, the Canon RF45mm F1.2 STM and the TTARTISAN 40mm f2 Lens for Z Mount present two distinct options for photographers. The Canon lens retails for $469.00, while the TTARTISAN lens is significantly more budget-friendly at $168.00, making it about 64% cheaper. Each lens offers unique features, catering to different needs and preferences among photographers.
Build Quality
The Canon RF45mm F1.2 STM is designed with a focus on compactness and affordability, featuring a large-diameter mount and short back focus. Its construction allows for effective digital distortion correction, resulting in a lightweight and portable lens. In contrast, the TTARTISAN 40mm f2 boasts a premium build from 5052 aerospace aluminum, weighing only 167g. This makes it ultra-portable, perfect for travel and quick shooting. While both lenses are designed for durability, the materials used in the TTARTISAN lens offer a notably lightweight option.
Aperture Performance
The Canon RF45mm F1.2 STM features an impressive f/1.2 aperture, allowing for faster shutter speeds in low-light situations. This wide aperture facilitates beautiful bokeh, helping to isolate subjects from the background in portrait and lifestyle photography. On the other hand, the TTARTISAN 40mm f2 offers a bright f/2 aperture, providing excellent clarity and color reproduction even in challenging lighting conditions. While the Canon lens excels in extreme low-light scenarios, the TTARTISAN still delivers commendable performance, though it may not achieve the same level of separation in portraits.
Versatility in Shooting
The Canon lens presents versatility for various types of photography, including portraits and everyday narratives. Its wide aperture enables a three-dimensional look, making it a favorite among creators looking to elevate their work. The TTARTISAN 40mm f2, with its 57° full-frame angle, captures true-to-life perspectives, making it ideal for street photography and authentic textures. While both lenses are versatile, the Canon RF45mm shines in artistic expression, while the TTARTISAN is well-suited for capturing everyday moments.
Autofocus and Tracking
When it comes to autofocus performance, the TTARTISAN 40mm f2 incorporates advanced features such as STM motor and face/eye tracking. This ensures smooth focus transitions, making it particularly effective for video shooting and dynamic portraits. In contrast, the Canon RF45mm F1.2 STM does not specifically highlight autofocus capabilities in its features. Therefore, if autofocus performance is a priority, the TTARTISAN may be the more appealing option.
Price Comparison
The price difference between the two lenses is significant, with the Canon RF45mm F1.2 STM priced at $469.00 and the TTARTISAN 40mm f2 at $168.00. This makes the TTARTISAN lens about 64% cheaper than the Canon option. For photographers on a budget or those just starting, the affordability of the TTARTISAN makes it an attractive choice without sacrificing essential performance features. However, the Canon lens offers premium capabilities that may justify its higher price for more serious photographers.
Target Audience
The Canon RF45mm F1.2 STM is aimed at professional photographers and creators who seek high-quality optics and are willing to invest in a premium lens. Its exceptional low-light performance and artistic capabilities cater to those looking to produce striking visual narratives. In contrast, the TTARTISAN 40mm f2 is designed for enthusiasts and casual photographers who prioritize portability and affordability. Its lightweight design and ease of use make it a great choice for hobbyists and travelers.
Which should you buy?
Choosing between the Canon RF45mm F1.2 STM and the TTARTISAN 40mm f2 ultimately depends on your specific needs and budget. If you are seeking a high-performance lens for professional use and are willing to invest, the Canon lens offers unparalleled capabilities, especially in low light and creative bokeh. However, if affordability and portability are your primary concerns, the TTARTISAN lens is an excellent choice, providing solid performance at a fraction of the price.

