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Canon RF 75- vs Tamron 17-

Updated July 2026 — Canon RF 75- wins on focal length and close focus, Tamron 17- wins on price and filter size.

The Canon RF 75-300mm f/4-5.6 offers excellent value for budget-conscious photographers, while the Tamron 17-70mm f/2.8 excels in versatility and low-light performance.

Why Canon RF 75- is better

Price

Canon is significantly cheaper at $253.95.

Weight

Canon is lighter, making it more portable.

Focal Range

Canon offers a longer focal range for telephoto needs.

Why Tamron 17- is better

Aperture

Tamron has a constant f/2.8 aperture for better low-light performance.

Optical Quality

Tamron features advanced optical elements for superior image quality.

Stabilization

Tamron includes AI-enhanced stabilization for video shooting.

Overall score

Canon RF 75-
75
Tamron 17-
88

Specifications

SpecCanon RF 75-Tamron 17-
BrandCanonTamron
Max Aperturef/4-5.6f/2.8
Focal Length75-300mm17-70mm
Weight1.0 lb1.2 lb
Close Focus4.9 ft7.5 in

Dimension comparison

Canon RF 75-Tamron 17-

Overview of the Canon RF 75-300mm f/4-5.6 Lens

The Canon RF 75-300mm f/4-5.6 Lens is designed for versatility in photography, particularly for capturing distant subjects such as wildlife and sports. Priced at $253.95, this lens offers a lightweight telephoto zoom that covers a focal length range equivalent to 120-480mm on APS-C cameras. Canon emphasizes its portability, making it a suitable option for travel and everyday photography. With a variable aperture of f/4-5.6, it maintains a balance between reach and compactness, weighing just over 1 lb. The lens also features advanced optical design for sharpness and clarity, enhanced by Super Spectra Coating to minimize lens flare and ghosting.

Overview of the Tamron 17-70mm f/2.8 Di III-A VC RXD Lens

The Tamron 17-70mm f/2.8 Di III-A VC RXD Lens is a high-speed zoom lens tailored for Sony APS-C mirrorless cameras, priced significantly higher at $599.00. It covers a focal length range equivalent to 25.5-105mm in full-frame terms, making it ideal for everyday shooting scenarios. One of its standout features is a constant maximum aperture of f/2.8 throughout its zoom range, enhancing low-light performance and depth of field options. The lens incorporates advanced optical elements and Vibration Compensation technology, making it suitable for both photography and videography, particularly due to its AI-enhanced stabilization for video shooting.

Design and Build Quality

In terms of design, the Canon RF 75-300mm f/4-5.6 is compact and lightweight, making it easy to carry around, especially for outdoor shooting. It features a 58mm filter thread, which is standard for many lenses, allowing for easy integration into existing photography kits. Conversely, the Tamron 17-70mm f/2.8 lens, while also relatively lightweight, includes moisture-resistant construction and a fluorine coating that enhances durability and usability in various weather conditions. This lens has a larger filter size of 67mm, which can lead to increased costs for filters but may enhance optical performance with higher-quality glass.

Optical Performance

The optical performance of the Canon RF 75-300mm f/4-5.6 is optimized for sharpness and clarity, thanks to its Super Spectra Coating, which combats lens flare and ghosting. It also boasts a close-focusing capability with a minimum distance of 4.9 feet, allowing for semi-macro photography. In contrast, the Tamron 17-70mm f/2.8 features a more complex optical design with 16 elements in 12 groups, including two Glass Molded Aspherical lenses, aimed at achieving outstanding optical performance. Its close-focusing capability is impressive, with a minimum distance of just 7.5 inches at 17mm, making it incredibly versatile for a range of subjects.

Autofocus and Shooting Experience

Both lenses offer responsive autofocus systems, but they cater to slightly different needs. The Canon RF 75-300mm f/4-5.6 utilizes a DC motor for autofocus, which is suitable for both stills and video, providing accurate focusing performance. This lens is particularly effective for capturing fast-moving subjects in sports and wildlife photography. On the other hand, the Tamron 17-70mm f/2.8 leverages advanced features found in Sony cameras, such as Fast Hybrid AF and Eye AF, enhancing its performance for portrait and event photography. The AI technology in its Vibration Compensation system also improves stabilization during video shooting, making it a strong contender for videographers.

Price Comparison

The price difference between the two lenses is substantial, with the Canon RF 75-300mm f/4-5.6 priced at $253.95 and the Tamron 17-70mm f/2.8 at $599.00. This makes the Canon lens about 57% cheaper than its Tamron counterpart. For photographers on a budget or those who primarily need a telephoto option, the Canon lens presents a more accessible choice. However, the Tamron's features, such as the constant f/2.8 aperture and advanced stabilization, justify its higher price for users seeking versatility in a variety of shooting conditions.

Use Cases

When considering use cases, the Canon RF 75-300mm f/4-5.6 is particularly suited for wildlife and sports photography, where long focal lengths are essential. Its lightweight design also makes it an excellent option for travel photography, where portability is a priority. Meanwhile, the Tamron 17-70mm f/2.8 is ideal for everyday photography, including portraits and events. Its wider aperture allows for more creative control over depth of field, and its robust construction makes it a reliable choice in less-than-ideal weather conditions.

Which should you buy?

Choosing between the Canon RF 75-300mm f/4-5.6 and the Tamron 17-70mm f/2.8 depends largely on your photography needs and budget. If you require a lightweight, budget-friendly telephoto lens primarily for sports and wildlife, the Canon RF 75-300mm is the better choice. However, for those looking for a versatile, high-speed zoom lens for a variety of shooting scenarios, including low-light conditions, the Tamron 17-70mm f/2.8 offers excellent performance and features that justify its higher price. Ultimately, both lenses cater to different segments of photographers, and your decision should align with your specific shooting style and requirements.