vsversusfinder

Canon RF100- vs Tamron 18-

Updated July 2026 — Canon RF100- wins on focal length and min focus, Tamron 18- wins on zoom ratio.

The Canon lens excels in telephoto performance and build quality, while the Tamron lens offers versatility and affordability.

Why Canon RF100- is better

Price

Canon lens is more expensive but offers superior features.

Zoom Range

Canon lens has a longer focal length.

Build Quality

Canon lens has L-series construction for durability.

Why Tamron 18- is better

Weight

Tamron lens is lighter and more portable.

Price

Tamron lens is significantly cheaper.

Versatility

Tamron lens covers a wider zoom range.

Overall score

Canon RF100-
88
Tamron 18-
76

Specifications

SpecCanon RF100-Tamron 18-
AutofocusDual Nano USMVXD
Image Stabilization5 stopsVC
Moisture ResistanceYesYes
Optical Elements7Special
Max ApertureF4.5F3.5

Dimension comparison

Canon RF100-Tamron 18-

Price Comparison

The Canon RF100-500mm F4.5-7.1 L is USM Lens is significantly more expensive than the Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD Lens. The price of the Canon lens is $2,898.95, while the Tamron lens retails for $599.00. This makes the Tamron lens about 80% cheaper than its Canon counterpart. If budget is a key consideration for you, the Tamron lens offers a more accessible entry point into quality photography without sacrificing too much versatility in zoom range.

Zoom Range and Versatility

In terms of zoom range, the Canon RF100-500mm lens offers a remarkable focal length of 100mm to 500mm, making it ideal for sports, wildlife, and aviation photography. This extensive range allows for detailed shots from a distance. On the other hand, the Tamron lens covers a wide-angle to ultra-telephoto range of 18mm to 300mm (27mm to 450mm full-frame equivalent). While the Canon lens excels in super-telephoto capabilities, the Tamron lens provides a versatile 16.6x zoom ratio, catering to a broader range of photography situations, including everyday life and travel.

Autofocus Performance

The Canon RF100-500mm features high-speed, smooth, and quiet autofocus thanks to its Dual Nano USM technology. This is particularly advantageous for capturing fast-moving subjects, ensuring that you don’t miss fleeting moments. Conversely, the Tamron lens incorporates VXD (Voice-coil eXtreme-torque Drive) linear motor autofocus. This technology also promises fast and precise autofocus, making it suitable for both stills and video. While both lenses prioritize autofocus performance, the Canon lens may have a slight edge in speed and quietness, especially in dynamic shooting scenarios.

Build Quality and Durability

The Canon RF100-500mm lens boasts L-series construction, which includes dust and weather resistance, making it reliable for outdoor shooting under challenging conditions. Additionally, it features fluorine-coated lens elements that resist dirt, moisture, and oils. The Tamron lens, while also designed with moisture-resistant construction and fluorine coating, weighs just 21.9 ounces, making it more portable. Although both lenses offer solid build quality, the Canon’s L-series designation suggests a higher level of durability suited for professionals who frequently shoot in variable environments.

Optical Performance

When it comes to optical performance, the Canon lens includes one Super UD and six UD lenses, ensuring brilliant resolving power and clarity throughout its zoom range. The Tamron lens also excels with special optical elements arranged to maintain high resolution from the center to the corners, which is essential for high-quality images. Both lenses are designed to deliver excellent image quality, but the Canon lens may provide slightly sharper results, especially at longer focal lengths, owing to its advanced optical design.

Minimum Focusing Distance

The Canon RF100-500mm has a minimum focusing distance of 3.0 feet (0.9 meters), which allows for effective subject isolation and detail capture at a distance. In comparison, the Tamron lens offers a remarkably close focusing distance of 5.9 inches at 18mm, allowing for impressive macro photography capabilities. This makes the Tamron lens highly versatile for both wide-angle and close-up shots, while the Canon lens is more specialized for distant subjects.

Weight and Portability

The Tamron lens is notably lighter and more compact, measuring 4.9 x 2.9 inches and weighing 21.9 ounces. This makes it an excellent choice for travel and street photography, where carrying a lighter setup can be advantageous. The Canon RF100-500mm, though designed to be travel-ready, is inherently bulkier due to its super-telephoto capabilities. If portability is a significant factor in your decision-making, the Tamron lens will be more comfortable for extended use.

Which should you buy?

Ultimately, the choice between the Canon RF100-500mm F4.5-7.1 L is USM Lens and the Tamron 18-300mm F/3.5-6.3 Di III-A VC VXD Lens depends on your specific photography needs and budget. If you're focused on wildlife or sports photography and require exceptional telephoto performance, the Canon lens is the superior option despite its higher price. However, if you're looking for a versatile, all-in-one solution that accommodates a wide range of shooting situations and is budget-friendly, the Tamron lens is an excellent choice. Consider what features are most important to you, and choose accordingly.