S erounder vs Canon RF
Updated July 2026 — S erounder wins on weight and compatibility, Canon RF wins on price and aperture.
The 37mm 0.25X Super Fisheye Lens is a budget-friendly option for creative photography, while the Canon RF 50mm F1.8 STM Lens offers superior versatility for portraits and low-light conditions.
Why S erounder is better
Price
Significantly cheaper at $52.35
Weight
Lightweight at 228g
Macro Feature
Includes a removable macro lens for close-up shots
Why Canon RF is better
Optical Quality
Wide f/1.8 aperture for better low-light performance
Autofocus
STM motor for smooth and silent autofocus
Build Quality
Aspheric lens element enhances image quality
Overall score
Specifications
| Spec | S erounder | Canon RF |
|---|---|---|
| Brand | S erounder | Canon |
| Material | Aluminum Alloy + Optical Glass | Unknown |
| Fisheye Effect | Yes | No |
| Autofocus | No | Yes |
| Use Case | Creative Photography | Portraits |
Dimension comparison
Overview of the Products
In this comparison, we will explore two distinct camera lenses: the 37mm 0.25X Super Fisheye Lens Additional Lens and the Canon RF 50mm F1.8 STM Lens. The first lens is priced at $52.35, while the latter is significantly more expensive at $219.00. Each lens serves a different purpose and caters to different photography styles, making a direct comparison essential for potential buyers.
Build Quality and Design
The 37mm 0.25X Super Fisheye Lens features a sturdy aluminum alloy construction combined with optical glass, ensuring durability and long service life. Weighing approximately 228g, it is lightweight and easy to carry. In contrast, the Canon RF 50mm F1.8 STM Lens is also compact and lightweight but emphasizes its advanced design with an aspheric lens element. This design enhances image quality, particularly in portrait photography. While both lenses are portable, the choice of materials in the Canon lens may appeal to photographers seeking a more premium feel.
Optical Performance
The optical performance of the lenses varies significantly. The 37mm 0.25X Super Fisheye Lens offers a unique fisheye effect with a wide view, making it ideal for creative photography and special shooting occasions. Its 0.25X magnification is specifically designed for wide-angle shots. On the other hand, the Canon RF 50mm F1.8 STM Lens features a wide f/1.8 aperture, which excels in low-light conditions and provides a beautiful background blur, perfect for portraits. If optical versatility is a priority, the Canon lens may have the upper hand thanks to its aperture and lens element design.
Features and Usability
The 37mm 0.25X Super Fisheye Lens is designed for ease of use, featuring a removable macro lens that allows for 12.5 times magnification, making it suitable for close-up shots. It comes with a storage bag, enhancing its portability. The Canon RF 50mm F1.8 STM Lens features an STM motor, which offers smooth, fast, and near-silent autofocus, making it user-friendly for spontaneous photography. While both lenses are user-centric, the Canon lens's advanced autofocus system may be more appealing to those looking for quick, reliable performance.
Price Comparison
The price difference between the two products is substantial. The 37mm 0.25X Super Fisheye Lens is available for $52.35, which is about 76% less than the Canon RF 50mm F1.8 STM Lens, priced at $219.00. This significant price difference makes the fisheye lens an attractive option for those on a budget or for hobbyists looking to experiment without a hefty investment. However, the higher price of the Canon lens may reflect its advanced features and overall versatility for serious photographers.
Target Audience
The 37mm 0.25X Super Fisheye Lens is aimed at creative photographers who enjoy experimenting with unique perspectives and special effects. Its wide-angle capabilities make it suitable for capturing landscapes, architecture, and artistic shots. Conversely, the Canon RF 50mm F1.8 STM Lens targets portrait photographers and those seeking a reliable, versatile lens for everyday photography. Each lens appeals to different segments of the market, catering to specific photography needs and preferences.
Compatibility and Versatility
The 37mm 0.25X Super Fisheye Lens is compatible with all 37mm caliber camera lenses, showcasing strong applicability across various camera models. This makes it an excellent addition for photographers with compatible equipment. The Canon RF 50mm F1.8 STM Lens is designed exclusively for EOS R-Series cameras, which may limit its versatility for users with different camera systems. If you own an EOS R-Series camera, the Canon lens may be the better choice, while the fisheye lens offers broader compatibility.
Which should you buy?
Choosing between the 37mm 0.25X Super Fisheye Lens and the Canon RF 50mm F1.8 STM Lens ultimately depends on your photography needs and budget. If you are looking for a budget-friendly option for creative and experimental photography, the fisheye lens at $52.35 is hard to beat. However, if you require a more versatile lens for portrait work and low-light conditions, the Canon lens, although priced at $219.00, may provide better value for your investment. Each lens has its strengths, making the decision a matter of personal preference and intended use.

