S erounder vs VILTROX
Updated July 2026 — S erounder wins on weight and focal length, VILTROX wins on price and build.
The VILTROX 20mm f2.8 FE lens offers superior optical performance and autofocus capabilities, making it the better choice for serious photographers.
Why S erounder is better
Lower Price
The 37mm fisheye lens is significantly cheaper at $52.35.
Macro Capability
The fisheye lens can be used for macro photography with 12.5x magnification.
Lightweight
The fisheye lens is slightly heavier but still portable.
Why VILTROX is better
Optical Quality
The VILTROX lens has advanced optical structure for clearer images.
Autofocus
The VILTROX lens features fast autofocus for moving subjects.
Versatility
The VILTROX lens fits multiple Sony e-mount cameras.
Overall score
Specifications
| Spec | S erounder | VILTROX |
|---|---|---|
| Material | Aluminum Alloy | Unknown |
| Autofocus | No | Yes |
| Lens Elements | 2 | 10 |
| Macro Mode | Yes | No |
| Image Distortion | High | Low |
Dimension comparison
Overview of the Products
In this comparison, we will be looking at the 37mm 0.25X Super Fisheye Lens Additional Lens from S erounder and the VILTROX 20mm f2.8 FE lens. The former is priced at $52.35, while the latter comes in at $176.00, making the fisheye lens about 70% cheaper than the VILTROX lens. Both products cater to different photography needs, with the fisheye lens focusing on wide-angle and macro capabilities, whereas the VILTROX lens is designed for versatile wide-angle shots with autofocus features.
Design and Build Quality
The 37mm 0.25X Super Fisheye Lens is made from high-quality aluminum alloy and optical glass, ensuring durability and a long service life. Weighing approximately 228 grams, its lightweight design makes it easy to carry, especially with the included storage bag. On the other hand, the VILTROX 20mm f2.8 FE lens is also compact, weighing only 157 grams, which enhances its portability. Its optical structure consists of 10 elements in 8 groups, including 2 ED lenses and 2 aspherical lenses, ensuring high-quality images. Both lenses are built to withstand regular use, but the materials used in the VILTROX lens may offer a slight edge in optical performance.
Image Quality
When it comes to image quality, the VILTROX 20mm f2.8 FE lens boasts a minimum focus distance of 0.62 feet (0.19 m) and a maximum magnification ratio of 0.17x. This makes it suitable for capturing detailed images even at close range. In contrast, the 37mm 0.25X Super Fisheye Lens provides a fisheye effect that expands the field of view significantly, allowing photographers to capture a wider scene. However, while the fisheye lens offers a unique perspective, it may not deliver the same level of sharpness and clarity as the VILTROX lens, which is designed with advanced optical structures that promise crisp and distortion-free images.
Autofocus and Usability
The VILTROX 20mm f2.8 FE lens features fast autofocus capabilities, which is crucial for capturing moving subjects or spontaneous moments. This lens supports EXIF information transmission, allowing for better integration with Sony cameras. In contrast, the 37mm 0.25X Super Fisheye Lens does not mention autofocus features, which may limit its usability for those who require quick adjustments. The absence of autofocus might make the fisheye lens less appealing for dynamic shooting situations, while the VILTROX lens stands out for its user-friendly design and efficient performance.
Versatility
The 37mm 0.25X Super Fisheye Lens offers versatility through its two-part design, allowing photographers to use it as a standard fisheye lens or as a macro lens with a 12.5x magnification effect. This adaptability makes it suitable for various shooting scenarios, particularly for creative photography. On the other hand, the VILTROX 20mm f2.8 FE lens serves as a prime wide-angle lens that fits multiple Sony e-mount cameras, making it versatile for different types of photography, from landscapes to street photography. However, it lacks the macro capabilities that the fisheye lens provides, limiting its creative options in that regard.
Price Comparison
The 37mm 0.25X Super Fisheye Lens is priced at $52.35, making it considerably more budget-friendly than the VILTROX 20mm f2.8 FE lens, which retails for $176.00. This significant price difference—about 70%—makes the fisheye lens a more accessible option for photographers on a budget. While the VILTROX lens offers advanced features and superior optical quality, the economical choice of the fisheye lens could appeal to hobbyists or those experimenting with new photography styles without a hefty investment.
Target Audience
The target audience for the 37mm 0.25X Super Fisheye Lens primarily includes amateur photographers and those who enjoy creative and experimental photography. Its affordability and unique fisheye effect make it an attractive option for those looking to explore different perspectives without a significant financial commitment. Conversely, the VILTROX 20mm f2.8 FE lens is geared towards more serious photographers who require high-quality optics and reliable autofocus functionality for a range of shooting environments. Its advanced features cater to professionals needing versatility and performance in their gear.
Which should you buy?
Choosing between the 37mm 0.25X Super Fisheye Lens and the VILTROX 20mm f2.8 FE lens ultimately depends on your photography needs and budget. If you are looking for a cost-effective lens that offers a unique fisheye perspective and macro capabilities, the 37mm fisheye lens is a great choice at $52.35. However, if you require advanced optical performance, fast autofocus, and a versatile wide-angle option, the VILTROX lens, priced at $176.00, is worth the investment. Each lens serves different purposes, making the decision reliant on your specific shooting style and requirements.

