S erounder vs Viltrox
Updated July 2026 — S erounder wins on weight, Viltrox wins on price and portability.
The Viltrox 25mm F1.7 E offers superior versatility and performance, making it the better choice for serious photographers. However, the 37mm fisheye lens is a great budget option for creative effects.
Why S erounder is better
Price
Significantly lower cost at $52.35
Special Effects
Unique fisheye effect for creative photography
Macro Capability
Includes a macro lens with 12.5x magnification
Why Viltrox is better
Aperture
Bright f/1.7 for low-light performance
Autofocus
Quiet autofocus for video shooting
Weight
Lighter at 170g for portability
Overall score
Specifications
| Spec | S erounder | Viltrox |
|---|---|---|
| Aperture | N/A | f/1.7 |
| Material | Aluminum Alloy | Unknown |
| Fisheye Effect | Yes | No |
| Macro Lens | Yes | No |
| Autofocus | No | Yes |
Dimension comparison
Overview of the Products
In this comparison, we are looking at the 37mm 0.25X Super Fisheye Lens Additional Lens and the Viltrox 25mm F1.7 E. The former is priced at $52.35, while the latter comes in at $176.00, making the fisheye lens about 70% less expensive. This significant price difference raises the question of whether the additional features of the Viltrox justify its higher cost.
Design and Build Quality
The 37mm 0.25X Super Fisheye Lens features a design that incorporates high-quality aluminum alloy and optical glass materials, ensuring durability and a long service life. Its lightweight design, at approximately 228g, is complemented by a compact size that includes a storage bag for easy transport. In contrast, the Viltrox 25mm F1.7 E weighs slightly less at 170g, making it even more portable. While both lenses are designed for ease of use, the Viltrox lens’s construction allows for quiet autofocus, which is particularly beneficial for video shooting.
Optical Performance
When it comes to optical performance, the 37mm 0.25X Super Fisheye Lens provides a super fisheye effect, suitable for capturing a wider picture range. It has a magnification of 0.25X, which is ideal for special photography occasions. The Viltrox 25mm F1.7 E, on the other hand, boasts a bright f/1.7 maximum aperture. This feature lends itself well to low-light conditions and offers greater control over depth of field, making it a versatile choice for various shooting scenarios. The superior aperture of the Viltrox could be a deciding factor for photographers who often shoot in diverse lighting environments.
Versatility and Use Cases
The 37mm 0.25X Super Fisheye Lens is particularly tailored for creative photography, allowing for unique angles and perspectives. Its two-part design includes a macro lens that offers a 12.5 times magnification effect, making it suitable for macro close-up shooting. This feature enhances its versatility for photographers interested in both wide and close-up shots. The Viltrox 25mm F1.7 E, however, is designed for standard photography with its focus on everyday use and compatibility with various Sony E-mount cameras. While it excels in general-purpose photography, it lacks the specialized effects offered by the fisheye lens.
Autofocus Features
The Viltrox 25mm F1.7 E incorporates an STM stepper motor that provides quiet autofocus, enhancing the shooting experience by minimizing disruptions during photo and video capture. This feature is especially useful for videographers who require silent operation. In contrast, the 37mm 0.25X Super Fisheye Lens does not specify any autofocus capabilities, indicating that it may rely more on manual adjustments. For users who prioritize ease of use and efficiency in autofocus, the Viltrox lens may be the superior choice.
Portability and Convenience
Both lenses are designed with portability in mind, but the Viltrox 25mm F1.7 E is marginally lighter at 170g compared to the 228g of the 37mm 0.25X Super Fisheye Lens. This slight weight advantage makes the Viltrox easier to carry for extended periods, which is ideal for travel photographers. Additionally, both products come with storage solutions; however, the Viltrox lens’s focus on everyday usability may make it a more convenient option for daily photography needs.
Price Comparison
The price difference between the two lenses is stark, with the 37mm 0.25X Super Fisheye Lens retailing for $52.35 and the Viltrox 25mm F1.7 E at $176.00. This represents a difference of about $123.65, or roughly 70% more for the Viltrox lens. While the lower price of the fisheye lens is appealing, potential buyers must consider whether its specialized features meet their needs or if the versatility and advanced technology of the Viltrox justify its higher price.
Customer Appeal
The 37mm 0.25X Super Fisheye Lens targets a niche market of photographers looking for creative effects and macro capabilities. Its affordability makes it an attractive option for hobbyists or beginners entering the world of photography. Conversely, the Viltrox 25mm F1.7 E appeals to more serious photographers who require a reliable everyday lens with advanced features, such as autofocus and low-light performance. The choice between the two ultimately comes down to the user’s specific photography needs and budget constraints.
Which should you buy?
In conclusion, the decision between the 37mm 0.25X Super Fisheye Lens and the Viltrox 25mm F1.7 E hinges on what you value in a lens. If you are looking for a unique, creative lens at a budget-friendly price, the fisheye lens is a compelling choice. However, for those who prioritize versatility, low-light performance, and quiet autofocus capabilities, the Viltrox lens represents a worthwhile investment despite its higher price. Consider your photography style and requirements to make the best choice for your needs.

