Canon RF45mm F1.2 STM vs Tamron 25-
Updated July 2026 — Canon RF45mm F1.2 STM wins on weight, Tamron 25- wins on price and focal length.
The Canon RF45mm F1.2 STM excels in low-light performance and image quality, while the Tamron 25-200mm offers versatility and zoom capabilities.
Why Canon RF45mm F1.2 STM is better
Price
Canon lens is significantly cheaper at $469.
Aperture
Canon has a wider f/1.2 aperture for low-light.
Bokeh
Canon provides superior bokeh for portraits.
Why Tamron 25- is better
Versatility
Tamron's zoom range from 25mm to 200mm.
Autofocus
Tamron features fast VXD autofocus for action.
Close-Up
Tamron offers 1:1.9 magnification for macro shots.
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | Tamron 25- |
|---|---|---|
| Lens Type | Prime | Zoom |
| Brand | Canon | Tamron |
| Max Aperture | f/1.2 | f/2.8-5.6 |
| Autofocus | Standard | VXD |
| Close-Up | N/A | 1:1.9 |
Dimension comparison
Price Comparison
The Canon RF45mm F1.2 STM is priced at $469.00, making it about 17% cheaper than the Tamron 25-200mm F/2.8-5.6 Di III VXD G2, which retails for $899.00. This significant price difference can be a deciding factor for many photographers, especially those who are budget-conscious. The Canon lens offers a standard prime focal length, which may appeal to creators looking for high-quality images without breaking the bank. Conversely, the Tamron lens, while more expensive, provides versatility with its zoom range, catering to photographers who prefer an all-in-one solution.
Lens Type and Versatility
The Canon RF45mm F1.2 STM is a prime lens, while the Tamron 25-200mm F/2.8-5.6 Di III VXD G2 is a zoom lens. The difference in lens type directly impacts versatility. The Canon lens is excellent for capturing portraits and low-light situations due to its wide f/1.2 aperture, which allows for faster shutter speeds and beautiful bokeh. On the other hand, the Tamron lens's zoom capability from 25mm to 200mm makes it suitable for a wide range of subjects, from landscape to wildlife photography. This flexibility can be particularly beneficial for photographers who want to carry just one lens for various shooting scenarios.
Aperture and Low-Light Performance
The Canon RF45mm F1.2 STM features a fast f/1.2 aperture, which excels in low-light conditions and creates stunning shallow depth-of-field effects. This lens allows photographers to isolate subjects against beautifully blurred backgrounds, enhancing the overall aesthetic of their images. In contrast, the Tamron lens has a variable aperture ranging from f/2.8 to f/5.6. While it performs well across its zoom range, it does not achieve the same level of low-light performance as the Canon lens. For those shooting in dimly lit environments, the Canon lens may be the better option.
Autofocus Technology
The Tamron 25-200mm F/2.8-5.6 Di III VXD G2 comes equipped with fast and precise VXD autofocus technology, designed to capture fast-moving subjects like children and pets effectively. This feature enhances its usability for action photography, making it suitable for dynamic shooting scenarios. In contrast, while the Canon RF45mm F1.2 STM also has reliable autofocus capabilities, it does not specifically highlight any advanced autofocus technology. Thus, if you're focused on capturing action shots, the Tamron lens might be a more suitable choice.
Close-Up Performance
The Tamron lens boasts outstanding close-up performance with a maximum magnification ratio of 1:1.9 at the 25mm end, making it ideal for half-macro shooting. This feature allows photographers to capture intricate details in subjects such as flowers or small objects, providing additional creative opportunities. The Canon RF45mm F1.2 STM, while excellent for portraits, does not emphasize macro capabilities. For photographers who value close-up work, the Tamron lens presents a considerable advantage.
Build Quality and Portability
Both the Canon RF45mm F1.2 STM and the Tamron 25-200mm F/2.8-5.6 Di III VXD G2 are designed with portability in mind, but they cater to different needs. The Canon lens is compact for a prime lens with such a wide aperture, making it easy to carry for everyday use. On the other hand, the Tamron lens, being an all-in-one zoom, is also compact but offers the versatility of multiple focal lengths in one body. For photographers who prioritize a lightweight setup without sacrificing functionality, either lens could fit the bill, depending on their specific needs.
Target Audience
The Canon RF45mm F1.2 STM is tailored for photographers seeking high-quality images with a focus on portraiture and low-light performance. Its premium features justify its price for those who understand the value of a fast prime lens. Meanwhile, the Tamron 25-200mm F/2.8-5.6 Di III VXD G2 appeals to a broader audience, including beginners and experienced users looking for a versatile all-in-one option. This lens serves as a reliable choice for those who want to simplify their gear without compromising on quality.
Which should you buy?
Choosing between the Canon RF45mm F1.2 STM and the Tamron 25-200mm F/2.8-5.6 Di III VXD G2 ultimately depends on your photography needs. If you prioritize low-light performance and the aesthetic of a prime lens, the Canon is a compelling option at $469. However, if versatility and a broader focal range are essential for your shooting style, the Tamron lens, priced at $899, offers significant advantages, especially with its fast autofocus and close-up capabilities. Consider your budget and shooting preferences carefully before making your decision.

