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S erounder vs Canon RF-S18-

Updated July 2026 — S erounder wins on weight, Canon RF-S18- wins on price and zoom range.

The Canon RF-S18-45mm lens offers superior versatility and optical performance, making it the better choice for most photographers.

Why S erounder is better

Price

The fisheye lens is significantly cheaper at $52.35.

Specialty

Designed specifically for creative fisheye photography.

Weight

Lighter weight at approximately 228g.

Why Canon RF-S18- is better

Versatility

Covers a zoom range of 18-45mm for various photography styles.

Optical Quality

Features two aspheric elements for better image quality.

Autofocus

Includes smooth and quiet autofocus capabilities.

Overall score

S erounder
65
Canon RF-S18-
85

Specifications

SpecS erounder Canon RF-S18-
Lens TypeFisheyeZoom
MaterialAluminum AlloyPlastic
Image StabilizationNoYes
AutofocusManualYes
Compatibility37mmAPS-C

Dimension comparison

S erounder Canon RF-S18-

Overview of the Products

When it comes to camera lenses, both the 37mm 0.25X Super Fisheye Lens Additional Lens and the Canon RF-S18-45mm F4.5-6.3 Lens offer unique features tailored for different photography needs. The Super Fisheye Lens, priced at $52.35, provides a specialized fisheye effect suitable for creative photography. In contrast, the Canon lens, available at $87.00, offers a versatile zoom range ideal for general photography and video work. The price difference of $34.65 highlights a significant gap in cost between the two, with the fisheye lens being about 40% cheaper than the Canon lens.

Design and Build Quality

The design and build quality of a lens can greatly influence its usability and durability. The 37mm Super Fisheye Lens is constructed from high-quality aluminum alloy and optical glass, ensuring sturdiness and a long service life. It comes with a storage bag, making it easy to carry and store, especially for photographers on the go. In contrast, the Canon RF-S18-45mm features a compact and lightweight design, specifically engineered for APS-C cameras. Its retractable mechanism enhances portability. While both lenses are designed for easy handling, the Canon lens wins on versatility due to its compactness, making it more convenient for everyday use.

Optical Performance

Optical performance is crucial for achieving high-quality images. The 37mm Super Fisheye Lens offers a unique fisheye effect with a magnification of 0.25X, allowing for wider picture ranges and creative shooting angles. However, this lens is specifically tailored for unique photographic effects and may not deliver the same quality for standard shots. On the other hand, the Canon RF-S18-45mm boasts excellent image quality through its two aspheric elements and Canon Super Spectra Coating. It also includes optical image stabilization that can correct up to 4 stops of shake, providing sharper images in various shooting conditions. For general photography aiming for high-quality results, the Canon lens clearly outperforms the fisheye lens.

Versatility and Usage Scenarios

Versatility in a lens can significantly enhance a photographer's experience. The 37mm Super Fisheye Lens is primarily designed for creative photography and special shooting occasions, making it less versatile for everyday use. It excels in capturing unique angles and wide views but may fall short for standard photography needs. Conversely, the Canon RF-S18-45mm is a standard zoom lens that covers a range of 18-45mm, making it suitable for a variety of photography scenarios, from landscapes to portraits. This flexibility is further enhanced by its compatibility with full-frame EOS R-series cameras, making it a more practical choice for diverse photography styles.

Autofocus Capabilities

Autofocus capabilities can greatly affect the shooting experience, especially in dynamic environments. The 37mm Super Fisheye Lens does not specifically mention autofocus features, indicating that it may rely on manual focus for optimal results. This could be a limitation for photographers who prefer quick adjustments in fast-paced situations. In contrast, the Canon RF-S18-45mm lens features a lead screw-type stepping motor (STM) designed for smooth and quiet autofocus operations. This capability is particularly beneficial for videographers, ensuring minimal background noise during recording. Thus, when it comes to autofocus performance, the Canon lens stands out as the more user-friendly option.

Price and Value

Pricing plays a significant role in determining the value of a product. The 37mm Super Fisheye Lens is priced at $52.35, making it a budget-friendly option for those looking to experiment with fisheye effects without a large investment. In comparison, the Canon RF-S18-45mm lens is priced at $87.00, which may seem steep but reflects its versatility, optical performance, and advanced features. The Canon lens, despite being about 66% more expensive, offers a broader range of applications and better overall performance, which may justify the higher cost for serious photographers.

Customer Acceptance and Popularity

Customer acceptance and popularity can provide insights into a product's reliability and performance. The Canon RF-S18-45mm lens has a sales rank of 604, indicating a solid market presence and acceptance among users. This popularity can often correlate with quality and customer satisfaction. In contrast, the 37mm Super Fisheye Lens does not have a specified sales rank, which could suggest it is less recognized or sought after. This difference in customer acceptance may influence potential buyers, as a well-regarded product often comes with assurance of quality and performance.

Which should you buy?

Choosing between the 37mm 0.25X Super Fisheye Lens Additional Lens and the Canon RF-S18-45mm F4.5-6.3 Lens ultimately depends on your photography needs. If you're looking for a specialized tool for unique creative shots, the fisheye lens offers great value at $52.35. However, for those seeking a versatile, high-quality lens for a wide range of photography applications, the Canon lens at $87.00 is a superior choice. It provides excellent image quality, autofocus capabilities, and greater adaptability, making it a worthwhile investment for any photographer.