S erounder 37mm 0.25X Super Fisheye 37mm
The detachable two-part design provides a 0.25X super fisheye effect and converts into a 12.5X macro lens for close-up shooting, all within a 228g aluminum alloy body. Its 37mm threading offers broad compatibility with existing camera lenses, and the included storage bag enhances portability for on-the-go use. This lens is best for hobbyist photographers wanting to experiment with extreme wide-angle distortion and high-magnification macro shots on a budget.
Panoramica
The 30-Second Version
A cheap, fun screw-on fisheye adapter with a surprisingly great detachable macro mode. The image quality is soft and distorted, which is exactly the point. For fifty bucks, it's a solid creative toy if you already have a 37mm lens.
Pros & Cons
Pro
- The detachable macro lens is a legitimately strong performer for close-up shots. 89th
- All-metal construction feels way more premium than the price suggests. 84th
- Creates a huge, dramatic fisheye effect that's just plain fun to play with. 82nd
- It's tiny, light, and comes with a pouch, so you can toss it in any bag. 65th
Contro
- Optical quality is rough, with soft details and noticeable color fringing.
- You're locked into using it with a 37mm filter thread lens, which limits compatibility.
- It's useless for landscape work, scoring near the bottom of our database.
- The novelty can wear off fast once you get past the initial gimmick.
Le prove
Performance
The whole reason you buy this is for the effect, and it delivers a massive, distorted fisheye field of view. It's a one-trick pony, and that trick is fun. The macro mode is a standout, hitting the 89th percentile in our database for close-up work, which is genuinely impressive for a screw-on accessory. The weak spot is optical quality, landing in the bottom quarter of lenses we've tested. You'll see soft edges, chromatic aberration, and a general lack of sharpness, but that's the trade-off for this kind of extreme, cheap glass.
Specifications
Full Specifications
Optics
| Type | Fisheye |
| Focal Length Min | 37 |
| Focal Length Max | 37 |
Build
| Mount | Canon EF |
| Weight | 0.2 kg / 0.5 lbs |
| Filter Thread | 64 |
AF & Stabilization
| Stabilization | Yes |
Focus
| Min Focus Distance | 37 |
| Max Magnification | 0.25X |
vs Competition
Stacking this against a real lens like the Sigma Contemporary 20mm f/2 DG is almost unfair, the Sigma is a sharp, versatile wide-angle while this is a specialty effect adapter. It's more about comparing it to other screw-on adapters like the Altura Photo UM2267. The S erounder's big party trick is that detachable macro element, which gives it a versatility edge that most cheap fisheye adapters lack. It won't touch the optical quality of a GoPro HB-Series lens for action, but it's not trying to. It's a creative tool, not a primary optic.
| Spec | S erounder 37mm 0.25X Super Fisheye 37mm | Sigma Contemporary 18-50mm f/2.8 DC DN | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | Nikon NIKKOR Z 17-28mm f/2.8 | Sony E 18-135mm f/3.5-5.6 OSS | Panasonic Leica DG Vario-Elmarit H-ES12035 |
|---|---|---|---|---|---|---|
| Focal Length | 37mm | 18-50mm | 17-70mm | 17-28mm | 18-135mm | 12-35mm |
| Max Aperture | - | f/2.8 | f/2.8 | f/2.8 | f/3.5 | f/2.8 |
| Mount | Canon EF | Sony E | Sony E | Nikon Z | Sony E | Micro Four Thirds |
| Stabilization | true | false | true | false | true | true |
| Weather Sealed | false | true | true | true | false | true |
| Weight (g) | 228 | 290 | 544 | 450 | 326 | 306 |
| AF Type | - | stepping motor | RXD | Stepping Motor | Linear motor | Autofocus |
| Lens Type | fisheye | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Prodotto | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Riscontro degli utenti | Stabilization |
|---|---|---|---|---|---|---|---|---|---|
| S erounder 37mm 0.25X Super Fisheye 37mm | 53.6 | 63.8 | 83.5 | 89.4 | 21.1 | 65.4 | 33.7 | 64.7 | 82.4 |
| Sigma Contemporary 18-50mm f/2.8 DC DN Compare | 87.2 | 81.3 | 86.6 | 90.8 | 82.6 | 83.5 | 78.6 | 89.4 | 36.7 |
| Tamron Di III 17-70mm f/2.8 Di III-A VC RXD Compare | 53.6 | 86.6 | 69.6 | 84.9 | 91.1 | 83.5 | 89.5 | 85 | 82.4 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 87.2 | 86.6 | 76.1 | 84.9 | 88.5 | 83.5 | 68.2 | 69.4 | 36.7 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 98.1 | 74.7 | 73.3 | 40.1 | 79.1 | 76.8 | 95.8 | 89.4 | 82.4 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 98.1 | 81.3 | 86 | 67.3 | 86.8 | 83.5 | 80.5 | 12.9 | 96.9 |
Prezzo
Value & Pricing
For the forty to fifty bucks this thing costs, it's a cheap ticket to a creative playground. You're not buying it for clinical sharpness, you're buying it for a specific, warped look that would cost a lot more to get with a dedicated fisheye lens. If you already have a compatible 37mm lens and want to mess around with wild perspectives and macro shots without breaking the bank, the value is absolutely there.
Approfondisci
Overview
This isn't a standalone lens. It's an adapter that screws onto the front of an existing 37mm lens to give you a wild fisheye look. Think of it as a fun filter, not a precision optic. The build quality is surprisingly solid for the price, all aluminum and glass, and it splits into two pieces so you can use the macro element on its own for extreme close-ups. But let's be real about the image quality, it's soft and full of distortion, which is kind of the point.
Common Questions
Q: Will this lens work on its own, or does it need to attach to another lens?
It has to screw onto the front of a camera lens with a 37mm filter thread. It won't mount directly to a camera body by itself.
Q: How do I use the macro function?
The lens is built in two parts. You can unscrew the wide-angle element from the front, and then use the remaining macro section on your lens to get a 12.5x close-up effect.
Q: Is the image quality sharp from corner to corner?
No, it's not designed to be. Expect soft edges, distortion, and color fringing as part of the extreme fisheye look, especially at this price point.
Who Should Skip This
Skip this if you need sharp, professional results for landscapes or any kind of commercial work. The optical quality is a real letdown for that, scoring in the 21st percentile. If you don't already own a lens with a 37mm filter thread, the added cost of an adapter or a new base lens kills the value proposition.
Verdict
Grab this if you have a compatible 37mm lens and want to inject some weird, wonderful distortion into your photos and videos without spending real lens money. It's a toy, but a well-built one that can spark some creative ideas, especially with that surprisingly good macro mode. Just don't expect it to replace a proper wide-angle lens.
