Canon RF45mm F1.2 STM vs Tamron 28-
Updated July 2026 — Canon RF45mm F1.2 STM wins on price and aperture, Tamron 28- wins on versatility and build.
The Canon RF45mm F1.2 STM excels in low-light performance and image quality, while the Tamron 28-75mm F2.8 Di III VXD G2 offers versatility and autofocus speed.
Why Canon RF45mm F1.2 STM is better
Price
Canon is $280 cheaper than Tamron
Aperture
Canon has a wider f/1.2 aperture
Bokeh
Canon provides superior background separation
Why Tamron 28- is better
Versatility
Tamron has a zoom range of 28-75mm
Autofocus
Tamron features a fast VXD linear motor
Build Quality
Tamron has moisture-resistant construction
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | Tamron 28- |
|---|---|---|
| Focal Length | 45mm | 28-75mm |
| Max Aperture | f/1.2 | f/2.8 |
| Min Object Dist. | N/A | 7.1in |
| Weight | 1.1 lbs | 1.2 lbs |
| Moisture Resistant | No | Yes |
Dimension comparison
Price Comparison
When it comes to pricing, the Canon RF45mm F1.2 STM is about 37% cheaper than the Tamron 28-75mm F2.8 Di III VXD G2. The Canon lens is priced at $469.00, while the Tamron lens retails for $749.00. This significant price difference makes the Canon lens an attractive option for those on a budget, especially given its capabilities as a prime lens. However, the higher price of the Tamron lens may be justified by its versatility and zoom range, accommodating a broader range of shooting scenarios.
Optical Performance
The Canon RF45mm F1.2 STM excels in low-light conditions with its wide f/1.2 aperture, allowing for faster shutter speeds and remarkable bokeh that enhances subject isolation. In contrast, the Tamron 28-75mm F2.8 Di III VXD G2 offers a constant f/2.8 aperture throughout its zoom range, which is still impressive but does not match the low-light performance of the Canon. While both lenses provide exceptional optical performance, the Canon’s larger aperture makes it particularly suited for portrait and lifestyle photography, where soft backgrounds are desired.
Autofocus Capabilities
The Tamron 28-75mm F2.8 Di III VXD G2 features a fast, quiet VXD linear motor for high-speed and high-precision autofocus, making it ideal for capturing fast-moving subjects. While the Canon RF45mm F1.2 STM does not specifically mention its autofocus system, its design suggests effective focus capabilities suitable for a variety of photography styles. For those prioritizing autofocus performance in dynamic environments, the Tamron lens may be the better choice.
Build Quality
The Tamron 28-75mm F2.8 Di III VXD G2 has a moisture-resistant construction and a fluorine coating, which enhances durability and usability in various weather conditions. The Canon RF45mm F1.2 STM, while compact and reasonably priced, does not highlight similar protective features. Photographers who often shoot outdoors or in challenging conditions may find the build quality of the Tamron lens more appealing, as it is designed to withstand the rigors of everyday use.
Versatility
The Tamron 28-75mm F2.8 Di III VXD G2 offers a versatile zoom range from 28mm to 75mm, making it suitable for a wide array of photography styles, including landscapes, portraits, and events. Its close-up capabilities, with a minimum object distance of 7.1 inches, further enhance its versatility. Conversely, the Canon RF45mm F1.2 STM is a standard prime lens, limiting its flexibility but excelling in specific scenarios where shallow depth of field and low-light performance are critical. For users seeking an all-in-one solution, the Tamron lens presents a distinct advantage.
Ideal Use Cases
The Canon RF45mm F1.2 STM is particularly well-suited for portrait photography, lifestyle shoots, and any scenario where bokeh and low-light performance are essential. Its f/1.2 aperture allows for stunning background separation and excellent detail in dim lighting. On the other hand, the Tamron 28-75mm F2.8 Di III VXD G2 is an ideal everyday lens for Nikon full-frame mirrorless camera users, offering flexibility across different types of photography, making it a valuable addition to any photographer's kit.
User Experience
Both lenses are designed with user experience in mind but cater to different preferences. The Canon RF45mm F1.2 STM promises a refined appearance straight out of the camera, ideal for creators looking for simplicity and quality. The Tamron 28-75mm F2.8 Di III VXD G2, with its rubber focusing ring and compact design, enhances usability, particularly for those who appreciate ease of handling and operation during long shooting sessions. The choice between them may ultimately come down to whether a user prioritizes image quality or versatility.
Which should you buy?
In conclusion, the choice between the Canon RF45mm F1.2 STM and the Tamron 28-75mm F2.8 Di III VXD G2 boils down to individual needs and shooting style. If you are looking for a budget-friendly option with outstanding low-light capabilities, the Canon lens is a fantastic choice. However, if you require versatility, autofocus speed, and durability, the Tamron lens justifies its higher price tag. Ultimately, both lenses serve different purposes, making it essential to assess your photography needs before making a decision.

