S erounder vs VILTROX
Updated July 2026 — S erounder wins on weight and portability, VILTROX wins on price and focal length.
The VILTROX 56mm F1.7 Fuji XF offers superior optical performance and versatility for portrait photography, while the 37mm fisheye lens is a budget-friendly option for creative wide-angle shots.
Why S erounder is better
Price
More affordable option at $52.35
Specialization
Ideal for unique fisheye effects
Portability
Compact and lightweight design
Why VILTROX is better
Optical Quality
Superior image quality with advanced lens structure
Aperture
Bright f/1.7 maximum aperture for low-light performance
Autofocus
Quiet STM autofocus for seamless shooting
Overall score
Specifications
| Spec | S erounder | VILTROX |
|---|---|---|
| Material | Aluminum Alloy | Optical Glass |
| Aperture | N/A | f/1.7 |
| Compatibility | 37mm lenses | Fuji X Mount |
| Macro Feature | Yes | No |
| Autofocus | Manual | STM |
Dimension comparison
Overview of the Products
The 37mm 0.25X Super Fisheye Lens Additional Lens is priced at $52.35, while the VILTROX 56mm F1.7 Fuji XF is significantly higher at $180.00. This difference of about 244% in price sets the stage for a comparison between a specialized fisheye lens and a versatile prime lens designed for portrait photography.
The fisheye lens is tailored for wide-angle shots, offering unique visual effects, whereas the VILTROX lens is better suited for everyday photography, especially portraits. This stark contrast in functionality defines their usage scenarios.
Build Quality and Design
The 37mm 0.25X Super Fisheye Lens is constructed from high-quality aluminum alloy and optical glass, ensuring durability and a long service life. It weighs approximately 228 grams and comes with a storage bag for portability. In comparison, the VILTROX 56mm F1.7 Fuji XF lens weighs slightly less at 171 grams, making it a lightweight option for travel and daily use.
Both lenses exhibit thoughtful design features, but the VILTROX lens offers a more refined build with a nine-blade diaphragm that enhances bokeh quality, which is essential for portrait photography. The aluminum alloy of the fisheye lens provides sturdiness, but it may lack the aesthetic and functional finesse found in the VILTROX.
Optical Performance
In terms of optical performance, the fisheye lens provides a 0.25X magnification and a wide fisheye effect. This allows for expansive vistas and creative photography opportunities, making it ideal for specific shooting scenarios. However, the VILTROX lens shines with its bright f/1.7 maximum aperture, which excels in low-light conditions and offers greater control over depth of field.
The VILTROX lens features a complex optical structure with 9 groups and 11 pieces, including 4 ED lenses and 3 high refraction index lenses. This configuration contributes to superior image quality, particularly for portrait shots, compared to the simpler optical setup of the fisheye lens.
Versatility and Use Cases
The 37mm 0.25X Super Fisheye Lens is designed for photographers seeking to capture unique and expansive images, ideal for creative projects or special occasions. Its removable macro capability allows for close-up shooting, providing versatility in specific contexts.
Conversely, the VILTROX 56mm F1.7 Fuji XF is a prime lens, offering an 85mm equivalent focal length on APS-C cameras, making it an excellent choice for portraiture. Its design caters to everyday photographers looking for a reliable all-rounder, suitable for various shooting environments, from casual snapshots to more serious portrait work.
Autofocus and Usability
The VILTROX lens incorporates an STM stepper motor for quiet autofocus, enhancing the shooting experience by ensuring that video and photo captures are not disrupted by noisy focusing mechanisms. This feature is particularly beneficial for videographers and those who prefer a seamless shooting environment.
In contrast, the 37mm fisheye lens lacks advanced autofocus capabilities, focusing more on manual adjustments to achieve the desired effects. While this can be an advantage for those looking to have full control over their shots, it may deter users who prefer the convenience of autofocus, especially in fast-paced settings.
Portability and Storage
Both lenses are designed with portability in mind, but they serve different purposes. The 37mm 0.25X Super Fisheye Lens is compact and lightweight, making it easy to carry around. It comes with a storage bag and a dust removal cloth, adding to its convenience for on-the-go photography.
The VILTROX lens is also lightweight at 171 grams, making it suitable for travel. However, it does not come with additional storage accessories, which may require users to invest in a separate case or bag. The compact nature of both lenses makes them practical choices for photographers who often work outside or travel frequently.
Price Comparison
At $52.35, the 37mm 0.25X Super Fisheye Lens is a budget-friendly option, especially when compared to the VILTROX 56mm F1.7 Fuji XF, which is priced at $180.00. This price difference of about $127.65 makes the fisheye lens appealing for those who are looking for unique photographic effects without a hefty investment.
The VILTROX lens, while significantly more expensive, offers advanced features and superior optical quality that may justify its higher price for serious photographers. This stark difference in pricing reflects the varying target audiences for each product, making the fisheye lens an attractive choice for hobbyists while the VILTROX caters to professionals.
Which should you buy?
Choosing between the 37mm 0.25X Super Fisheye Lens and the VILTROX 56mm F1.7 Fuji XF ultimately depends on your photographic needs. If you seek a specialized lens for creative wide-angle shots and macro photography without breaking the bank, the fisheye lens is a solid choice. However, if you are looking for a versatile and high-quality lens for portrait photography, the VILTROX lens delivers superior performance and features, albeit at a higher price point. Consider your specific usage scenarios and budget to make the best decision for your photography endeavors.

