Canon RF28- vs Tamron 28-200 F/2.8-5.6 Di III RXD for Sony
Updated July 2026 — Canon RF28- wins on weight and aperture, Tamron 28-200 F/2.8-5.6 Di III RXD for Sony wins on price and length.
The Canon RF28-70mm F2.8 is STM excels in image quality and build, while the Tamron 28-200 F/2.8-5.6 offers versatility at a lower price.
Why Canon RF28- is better
Image Quality
Canon offers superior edge-to-edge sharpness and low-light performance.
Build Quality
Canon's weather-resistant construction is more robust.
Aperture Control
Canon maintains a fixed f/2.8 aperture throughout the zoom range.
Why Tamron 28-200 F/2.8-5.6 Di III RXD for Sony is better
Price
Tamron is significantly cheaper at $699.
Portability
Tamron is lighter and more compact.
Versatility
Tamron covers a broader focal range in one lens.
Overall score
Specifications
| Spec | Canon RF28- | Tamron 28-200 F/2.8-5.6 Di III RXD for Sony |
|---|---|---|
| Max Aperture | f/2.8 | f/2.8-5.6 |
| Focal Length | 28-70mm | 28-200mm |
| Weight | 1.0 lb | 20.3 oz |
| Weather Resistance | Yes | Yes |
| Image Stabilization | Yes | No |
Dimension comparison
Overview of the Canon RF28-70mm F2.8 is STM
The Canon RF28-70mm F2.8 is STM is a versatile mid-range zoom lens known for its fixed f/2.8 aperture across the entire zoom range. Priced at $1,098.95, this lens is designed for content creators seeking high-quality performance without the bulk associated with traditional L-series lenses. The lens features advanced image stabilization and is crafted for durability, making it suitable for various shooting conditions.
The RF28-70mm lens is particularly appealing for those who prioritize image quality and a compact design. Its lightweight build (just over one pound) enhances portability, allowing photographers to bring it along for everyday use. The lens's impressive edge-to-edge sharpness is attributed to its unique optical design, which includes 2 UD elements to minimize chromatic aberration. This lens shines in low-light situations, providing photographers with more creative control.
Overview of the Tamron 28-200 F/2.8-5.6 Di III RXD
On the other hand, the Tamron 28-200 F/2.8-5.6 Di III RXD is priced at $699.00, making it about 36% less expensive than the Canon RF28-70mm. This all-in-one zoom lens is designed for Sony mirrorless full-frame and APS-C cameras, offering a versatile focal range from wide-angle to telephoto. Its maximum aperture of f/2.8 at 28mm makes it unique for an all-in-one zoom lens.
The Tamron lens weighs 20.3 ounces and measures only 4.6 inches in length, making it highly portable. Additionally, it features a moisture-resistant construction and a fluorine coating for added durability. The RXD stepping motor unit ensures quiet operation, making this lens a great choice for both still photography and video work. This lens caters to photographers looking for flexibility without sacrificing quality.
Price Comparison
When comparing prices, the Canon RF28-70mm F2.8 is STM costs $1,098.95, whereas the Tamron 28-200 F/2.8-5.6 is priced at $699.00. This means that the Tamron lens is around $399.95 cheaper, making it a more budget-friendly option for photographers.
The price difference can influence purchasing decisions, especially for those on a tighter budget or those who may not require the specific features of the Canon lens. While the Canon offers superior image quality and build, the Tamron provides an excellent balance of performance and versatility at a significantly lower price point.
Optical Performance
The Canon RF28-70mm F2.8 is STM is designed for high-quality imaging, featuring advanced elements that minimize chromatic aberration and ensure edge-to-edge sharpness. Its fixed f/2.8 aperture allows for excellent low-light performance and depth-of-field control, making it ideal for professional photographers who need reliable results in various conditions.
In contrast, the Tamron 28-200 F/2.8-5.6 also offers impressive optical performance, with a fast maximum aperture of f/2.8 at the wide end. While it provides versatility with its zoom range, its aperture gradually narrows to f/5.6 at the telephoto end. This makes the Canon lens potentially superior for low-light situations and creative photography that requires a wide aperture throughout the zoom range.
Build Quality and Durability
The Canon RF28-70mm F2.8 is STM boasts a weather-resistant construction that rivals L-series lenses, making it suitable for harsh shooting environments. This durability ensures that photographers can rely on it in various conditions, enhancing its appeal for serious users.
The Tamron 28-200 F/2.8-5.6 also features moisture-resistant construction and a fluorine coating, providing protection against the elements. However, the Canon lens's build quality is often regarded as more robust, which may be a crucial factor for photographers who frequently work outdoors or in challenging conditions.
Portability and Convenience
The Tamron 28-200 F/2.8-5.6 excels in portability, weighing only 20.3 ounces and measuring just 4.6 inches in length. This lightweight design makes it an excellent choice for travel and everyday use, allowing photographers to carry it without feeling burdened.
While the Canon RF28-70mm F2.8 is also relatively compact for a zoom lens, it is heavier than the Tamron, which might be a consideration for those prioritizing convenience. Nevertheless, both lenses offer excellent portability for their respective feature sets, allowing photographers to capture spontaneous moments with ease.
Ideal Use Cases
The Canon RF28-70mm F2.8 is STM is ideal for professional photographers and videographers who require high image quality and consistent performance across various situations. Its fixed f/2.8 aperture makes it suitable for low-light environments, portraits, and creative photography.
Conversely, the Tamron 28-200 F/2.8-5.6 is perfect for enthusiasts and casual photographers looking for a versatile all-in-one solution. Its broad focal range allows users to cover a wide array of subjects, from landscapes to portraits, without needing to switch lenses frequently. This flexibility makes it a great choice for travel and event photography.
Which should you buy?
Ultimately, the decision between the Canon RF28-70mm F2.8 is STM and the Tamron 28-200 F/2.8-5.6 comes down to your specific needs and budget. If you prioritize image quality, durability, and professional-grade performance, the Canon lens is worth the investment at $1,098.95. However, if you are looking for a versatile, budget-friendly option that still delivers good performance, the Tamron lens at $699.00 could be the better choice. Each lens serves different types of photographers, ensuring that there's a suitable option for everyone.

