Canon RF-S18- vs Tamron 28-

Design and Build Quality

The Tamron 28-75mm F/2.8 Di III VXD G2 offers a more compact and moisture-resistant design compared to the Canon RF-S18-150mm F3.5-6.3 Telephoto Lens. Tamron’s lens measures just 4.7 inches in length and weighs 19.4 ounces, emphasizing portability and ease of handling. It also features a moisture-resistant construction and a fluorine coating, enhancing durability and protecting the lens barrel from scratches. In contrast, the Canon RF-S18-150mm is designed primarily for APS-C cameras with RF mounts and does not highlight weather sealing or protective coatings in its description. The Canon lens prioritizes versatility with its zoom range and optical image stabilization but does not emphasize compactness or ruggedness like the Tamron. Overall, Tamron’s lens feels more tailored for demanding outdoor use and travel with its reinforced build, while Canon focuses on flexible everyday use.

Zoom Range and Aperture

Canon’s RF-S18-150mm lens provides a more extensive zoom range from 18mm to 150mm, covering wide-angle to telephoto perspectives, making it highly versatile for varied shooting scenarios. This contrasts with the Tamron 28-75mm lens, which offers a shorter zoom range limited to 28mm to 75mm. However, the Tamron compensates with a constant, fast aperture of f/2.8 throughout the zoom range, allowing for better low-light performance and more control over depth of field. The Canon lens has a variable aperture from f/3.5 at the wide end to f/6.3 at the telephoto end, which is slower and less ideal for low-light or creative bokeh effects. While Canon’s zoom range is about twice as long, Tamron’s wider aperture offers superior light gathering and background blur capabilities, important for portraits and indoor shooting.

Autofocus and Image Stabilization

Both lenses provide advanced autofocus systems tailored to their respective mounts. The Canon RF-S18-150mm features a lead screw-type stepping motor (STM) designed for smooth and quiet autofocus, especially beneficial for video shooting by minimizing noise. The lens also includes in-lens optical image stabilization (OIS) offering up to 4.5 stops of shake correction, which can extend to 6.5 stops when paired with EOS R series cameras that have In-Body Image Stabilizer (IBIS). This combination is excellent for handheld shooting in low light or while moving. On the other hand, the Tamron 28-75mm uses a fast and quiet VXD linear motor for autofocus, delivering high-speed and high-precision focusing. Although Tamron's lens does not specify in-lens stabilization, its autofocus system is among the best for Nikon Z mount mirrorless cameras, focusing on speed and accuracy rather than stabilization. Canon’s lens is more versatile for handheld and video work due to its superior image stabilization.

Close-up and Macro Capabilities

For close-up photography, the Tamron 28-75mm F/2.8 excels with a minimum object distance (MOD) of just 7.1 inches (0.18 meters) at the wide end and a maximum magnification ratio of 1:2.7. This makes it well-suited for creative close-up shots or semi-macro photography, allowing for detailed images of smaller subjects. The Canon RF-S18-150mm does not highlight specific minimum focusing distances or macro capabilities, focusing instead on general-purpose photography across a broad zoom range. As a result, Tamron’s lens offers more specialized functionality for users interested in close-up work, while Canon targets users needing flexibility across many focal lengths without the same close-up precision.

Compatibility and Sensor Coverage

The Canon RF-S18-150mm is designed specifically for APS-C cameras with the RF mount but features automatic APS-C sensor cropping when mounted on full-frame EOS R-series cameras. This ensures optimal performance and autofocus coverage (100% x 100% Dual Pixel CMOS AF on APS-C sensors and 80% x 80% on full-frame in crop mode). This makes it versatile within the Canon ecosystem, especially for users who may use both APS-C and full-frame EOS R cameras. Tamron’s 28-75mm G2 lens is built for full-frame Nikon Z mount mirrorless cameras, providing an ideal standard zoom option for these users. It is compatible with the latest high-pixel-resolution models but is not designed for APS-C cameras. The compatibility difference reflects the intended user bases: Canon’s lens suits APS-C and hybrid users, while Tamron’s lens targets Nikon full-frame mirrorless photographers.

Video and Still Photography Use

Both lenses cater to both still photography and video shooting, but with different strengths. The Canon RF-S18-150mm offers dynamic IS stabilization that works while shooting in motion during movie mode at wide angles, paired with a quiet lead screw-type STM autofocus motor that minimizes noise during video capture. This makes it a solid choice for video enthusiasts who want smooth autofocus and stabilization in one lens. The Tamron 28-75mm also supports video use but focuses more on high-speed, quiet VXD autofocus for smooth and precise focusing transitions. It additionally includes TAMRON Lens Utility software to expand shooting options for both stills and videos, a feature not mentioned for the Canon. Tamron’s faster aperture also benefits video in low-light and shallow depth-of-field scenarios. Overall, Canon emphasizes stabilization and quiet operation, while Tamron prioritizes fast focusing and aperture speed for video.

Price and Value

Price-wise, the Canon RF-S18-150mm F3.5-6.3 Telephoto Lens is listed at $569.00, making it about 24% less expensive than the Tamron 28-75mm F/2.8 Di III VXD G2, priced at $749.00. The price difference of $180 reflects the differing feature sets: Canon’s lens offers a much longer zoom range and advanced image stabilization, while Tamron provides a faster, constant aperture and a more compact, weather-resistant build. The Canon lens’s price is stable, with a 90-day average price matching its current price, while Tamron’s 90-day average is higher at $829.66, indicating it may be a premium lens with occasional discounts. Budget-conscious buyers seeking versatility across focal lengths may prefer Canon, while those prioritizing aperture speed and build quality might find Tamron worth the premium.

Which should you buy?

Your choice depends largely on your shooting style and camera system. If you use a Canon APS-C or EOS R series camera and want a versatile, all-around zoom lens with excellent image stabilization and a broad focal range, the Canon RF-S18-150mm at $569.00 is a compelling option. It covers everything from wide-angle to telephoto, making it great for landscapes, portraits, sports, and video with smooth autofocus and stabilization. However, if you own a Nikon full-frame Z mount mirrorless camera and prioritize a fast, constant f/2.8 aperture for low-light performance, portrait bokeh, and close-up capability, the Tamron 28-75mm F/2.8 Di III VXD G2 at $749.00 offers superior optics, compactness, and build quality. Tamron’s lens excels in speed, precision, and durability but at a higher price and shorter zoom range. Choose Canon for zoom versatility and stabilization or Tamron for aperture speed and professional-grade durability.