Canon RF45mm F1.2 STM vs Tamron 18-
Updated July 2026 — Tamron 18- leads on stability and ease of use.
The Canon RF45mm F1.2 STM excels in low-light performance and image quality, while the Tamron 18-300mm F/3.5-6.3 offers versatility for various photography styles.
Why Canon RF45mm F1.2 STM is better
Low-light performance
f/1.2 aperture allows for better low-light shooting
Bokeh quality
produces stunning background blur for portraits
Compact design
lightweight and easy to carry for specific uses
Why Tamron 18- is better
Versatility
16.6x zoom range covers wide to telephoto
Image stabilization
VC system helps reduce camera shake
All-in-one solution
ideal for various photography scenarios without lens changes
Overall score
Specifications
| Spec | Canon RF45mm F1.2 STM | Tamron 18- |
|---|---|---|
| Aperture | f/1.2 | f/3.5-6.3 |
| Zoom Range | Fixed | 18-300mm |
| Image Stabilization | No | Yes |
| Max Magnification | N/A | 1:2 |
| Target Audience | Portrait Photographers | General Photographers |
Dimension comparison
Overview of the Canon RF45mm F1.2 STM and Tamron 18-300mm F/3.5-6.3
The Canon RF45mm F1.2 STM is an excellent choice for those seeking a high-quality prime lens, while the Tamron 18-300mm F/3.5-6.3 is designed as a versatile all-in-one zoom lens. Priced at $469.00, the Canon lens focuses on delivering exceptional low-light performance and beautiful bokeh, making it ideal for portrait and lifestyle photography. In contrast, the Tamron lens, priced at $599.00, offers a 16.6x zoom range, catering to a broader range of photography styles, including landscapes and wildlife.
Design and Build Quality
When it comes to design and build quality, the Canon RF45mm F1.2 STM is a compact and reasonably priced lens that emphasizes portability without sacrificing performance. Its large-diameter mount and short back focus contribute to a sleek design, making it a comfortable addition to any camera setup. On the other hand, the Tamron 18-300mm F/3.5-6.3 is also compact and lightweight, specifically tailored for APS-C cameras. This makes it an excellent travel companion, fitting easily into camera bags while providing extensive versatility in focal lengths.
Optical Performance
Optical performance is a critical factor for any lens. The Canon RF45mm F1.2 STM shines with its f/1.2 aperture, allowing for faster shutter speeds in low-light conditions and producing stunning bokeh that separates subjects from the background. This lens is built with a PMo aspheric lens to reduce aberrations, ensuring sharp and clear images. In contrast, the Tamron 18-300mm F/3.5-6.3 provides a wide zoom range that covers everything from wide-angle to ultra-telephoto. However, its maximum aperture of f/3.5-6.3 means it may not perform as effectively in low light compared to the Canon.
Versatility and Use Cases
Versatility is a key selling point for the Tamron 18-300mm F/3.5-6.3, designed for various photography needs including travel, wildlife, and sports. Its extensive zoom range provides flexibility, allowing users to capture everything from close-up portraits to expansive landscapes without changing lenses. The Canon RF45mm F1.2 STM, while not a zoom lens, excels in specific scenarios like portraiture and low-light photography, offering a more specialized use case. For someone looking to cover multiple genres of photography, the Tamron lens presents a more versatile option.
Autofocus and Stability
Autofocus efficiency and image stabilization are crucial for capturing sharp images. The Canon RF45mm F1.2 STM leverages a fast autofocus system beneficial for spontaneous shots, especially in portrait settings. However, it lacks built-in image stabilization, which could be a drawback for handheld shooting in low light. The Tamron 18-300mm F/3.5-6.3 addresses this with its Vibration Compensation (VC) system, providing significant stability when shooting at longer focal lengths. This makes the Tamron a better choice for users concerned about camera shake during handheld shooting.
Price Comparison
The price difference between the two lenses is notable. The Canon RF45mm F1.2 STM retails for $469.00, while the Tamron 18-300mm F/3.5-6.3 is priced at $599.00. This places the Tamron lens at approximately 28% higher than the Canon, reflecting its broader range of features and versatility. For photographers on a budget, the Canon lens offers exceptional quality and performance without breaking the bank, making it an attractive option for those who primarily shoot in controlled environments.
Target Audience
The target audience for these lenses differs significantly. The Canon RF45mm F1.2 STM caters to portrait photographers and those who prioritize image quality and low-light performance. Its specialized features make it ideal for creators focusing on aesthetics and depth of field. Conversely, the Tamron 18-300mm F/3.5-6.3 targets a wider audience, including travelers and casual photographers who want an all-in-one solution. Its versatility makes it suitable for various shooting scenarios, appealing to those who prefer convenience over specialization.
Which should you buy?
Ultimately, the decision between the Canon RF45mm F1.2 STM and the Tamron 18-300mm F/3.5-6.3 comes down to your specific needs as a photographer. If you prioritize low-light performance and beautiful bokeh for portrait photography, the Canon lens is an outstanding choice at $469.00. However, if you seek versatility and a comprehensive solution for various photography styles, the Tamron lens, priced at $599.00, offers a broader range of capabilities. Consider your shooting style and preferences to choose the lens that best fits your photographic journey.

