Canon RF45mm F1.2 STM vs Tamron 70-
Updated July 2026 — Canon RF45mm F1.2 STM wins on price and aperture, Tamron 70- wins on stability and weight.
The Canon RF45mm F1.2 STM offers exceptional low-light performance and is budget-friendly, while the Tamron 70-180mm F/2.8 provides versatility and advanced features.
Why Canon RF45mm F1.2 STM is better
Price
Canon is significantly cheaper at $469.
Compactness
Canon is more portable and lightweight.
Low-light
Canon excels in low-light photography.
Why Tamron 70- is better
Versatility
Tamron offers a zoom range from 70mm to 180mm.
Image Stabilization
Tamron includes VC for steadier shots.
Autofocus
Tamron has advanced autofocus capabilities.
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | Tamron 70- |
|---|---|---|
| Focal Length | 45mm | 70-180mm |
| Aperture | f/1.2 | f/2.8 |
| Stabilization | No | Yes |
| Autofocus | Standard | High-speed |
| Build Quality | Compact | Robust |
Dimension comparison
Overview of Canon RF45mm F1.2 STM and Tamron 70-180mm F/2.8 Di III VC VXD G2
The Canon RF45mm F1.2 STM is more compact and significantly cheaper at $469.00 compared to the Tamron 70-180mm F/2.8 Di III VC VXD G2, which retails for $999.00. The price difference of $530 means that the Canon lens is about 53% less expensive than the Tamron lens, making it an appealing option for those looking to save money while still achieving quality photography.
The Canon RF45mm is a standard 45mm prime lens with an impressive f/1.2 aperture, allowing for excellent low-light performance and beautiful bokeh. In contrast, the Tamron lens is a versatile zoom lens that spans from 70mm to 180mm, providing more flexibility for various shooting situations. This fundamental difference in lens type will significantly influence which lens is more suitable for your needs.
Build and Design
The Canon RF45mm F1.2 STM boasts a compact and lightweight design, making it an excellent choice for photographers who prioritize portability. Its large-diameter mount and short back focus contribute to its compact nature, allowing for comfortable handling during extended shooting sessions.
On the other hand, the Tamron 70-180mm is relatively larger and heavier, measuring 6.2 inches and weighing 30.2 oz. However, it still maintains a reasonable size for a telephoto zoom lens. The robust build includes moisture-resistant construction and a fluorine coating, enhancing its adaptability to various shooting environments, especially in challenging weather conditions.
Optical Performance
The optical performance of both lenses caters to different needs. The Canon RF45mm F1.2 STM excels in low-light conditions due to its wide f/1.2 aperture, which allows for faster shutter speeds and captures stunning images with a three-dimensional quality. This lens is particularly effective for portrait and lifestyle photography, where background separation is crucial.
In contrast, the Tamron 70-180mm features a constant f/2.8 aperture throughout its zoom range, which is excellent for maintaining exposure consistency while shooting at different focal lengths. This lens also incorporates advanced optical technology to reduce aberrations and improve overall image quality, making it a solid choice for dynamic photography, including wildlife and sports.
Autofocus and Stability
Autofocus performance is a critical factor for many photographers. The Canon RF45mm F1.2 STM benefits from its design, allowing for quick autofocus capabilities, which is essential for capturing fleeting moments. However, it does not feature a specific image stabilization system.
The Tamron 70-180mm is equipped with the VXD (Voice-coil eXtreme-torque Drive) linear motor focus mechanism, which provides high-speed and high-precision autofocus. Additionally, it includes TAMRON’s proprietary VC (Vibration Compensation) image stabilization, ensuring steadier shots even at longer focal lengths. This feature is particularly beneficial for handheld shooting, especially in lower light conditions or at slower shutter speeds.
Versatility and Use Cases
When it comes to versatility, the Tamron 70-180mm F/2.8 shines with its zoom capabilities. Covering a range from 70mm to 180mm, it allows photographers to adapt quickly to different subjects, from portraits to distant wildlife. This flexibility makes it suitable for a variety of genres, including events, sports, and landscapes.
Conversely, the Canon RF45mm F1.2 STM is more specialized. While it excels in portrait and narrative photography due to its wide aperture and subject isolation capabilities, it may fall short for photographers needing a broader focal range. Thus, those who primarily focus on close-up work may find the Canon more beneficial, while those who enjoy diverse subjects will appreciate the Tamron's zoom range.
Price and Value Proposition
The price difference between the Canon RF45mm F1.2 STM and the Tamron 70-180mm is significant. At $469.00, the Canon lens offers an excellent value, particularly for those prioritizing quality in low-light conditions without breaking the bank. This lens is an attractive option for enthusiasts and professionals alike who seek high-quality images without the hefty price tag.
In contrast, the Tamron 70-180mm, priced at $999.00, represents a larger investment. However, this lens brings advanced features like image stabilization and a versatile zoom range, which can justify the higher cost for serious photographers who need that extra functionality and flexibility. The decision ultimately hinges on whether the user values a prime lens's optical quality or a zoom lens's versatility.
Community and Usage Feedback
Both lenses have garnered positive feedback from the photography community. Users of the Canon RF45mm F1.2 STM often commend its sharpness and the beautiful bokeh it produces, making it a favorite for portrait photographers. Its compact design also appeals to those who travel or shoot on the go.
The Tamron 70-180mm has also received accolades, particularly for its autofocus performance and image stabilization features. Photographers report that it performs exceptionally well in various conditions and excels in delivering high-quality images across the zoom range. The lens's ability to support dedicated TAMRON Lens Utility apps for customization further enhances its appeal to tech-savvy users.
Which should you buy?
Choosing between the Canon RF45mm F1.2 STM and the Tamron 70-180mm F/2.8 Di III VC VXD G2 ultimately depends on your specific needs as a photographer. If you are looking for a lightweight, budget-friendly option that excels in low-light conditions and portrait photography, the Canon lens is an excellent choice at $469.00. However, if you require versatility, image stabilization, and advanced autofocus capabilities, the Tamron lens, though pricier at $999.00, could better serve your photographic endeavors. Both lenses are outstanding in their own right; the best choice hinges on your shooting style and requirements.

