Lensbaby 5.8mm f/3.5 Circular Fisheye
The Lensbaby Fisheye Lens for Fujifilm X is a 5.8mm f/3.5 lens designed for Canon EF, Nikon F, Sony A, Sony E, Micro Four Thirds mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Lensbaby 5.8mm f/3.5 Circular Fisheye
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Lens Overview — Lensbaby Fisheye Lens for Fujifilm X
Key Features — Lensbaby Fisheye Lens for Fujifilm X
5.8mm Circular Fisheye: Produces a full circular image within the frame, delivering an extreme 185-degree field of view for a distinctly surreal perspective.
APS-C Format Coverage: Designed specifically for APS-C sensors, matching the format of a wide range of current mirrorless camera bodies.
f/3.5 Maximum Aperture: Offers reasonable light-gathering capability for a fisheye prime, useful in lower-light creative shooting situations.
Manual Focus Only: Fully manual focus operation puts complete control in the shooter's hands, suiting the deliberate, artistic style this lens is built for.
Wide Mount Compatibility: Available in Canon EF, Nikon F, Sony A, Sony E, and Micro Four Thirds mounts, covering a broad range of camera systems.
320g Prime Construction: Compact and lightweight at 320g, adding minimal bulk to a mirrorless kit.
Lens Specifications — Lensbaby Fisheye Lens for Fujifilm X
| Spec | Detail |
|---|---|
| Use Cases | Creative Effects |
| Lens Type | Fisheye |
| Format | APS-C |
| Zoom/Prime | Prime |
| Focal Length | 5.8mm |
| Maximum Aperture | f/3.5 |
| Camera System | Mirrorless |
| Lens Mount | Canon EF, Nikon F, Sony A, Sony E, Micro Four Thirds |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Weight | 320g |
Description — Lensbaby Fisheye Lens for Fujifilm X
The Lensbaby 5.8mm f/3.5 Circular Fisheye is a prime lens with a fixed focal length of 5.8mm and a maximum aperture of f/3.5, purpose-built for APS-C mirrorless camera systems. It falls into the wide-angle fisheye category and is designed for photographers looking to create dramatic, circular-perspective imagery with a strong creative character. Focus is entirely manual — there is no autofocus system — giving the photographer direct, tactile control over the image.
Weighing just 320g, the lens is easy to carry and handle on a mirrorless body. It offers compatibility across five mount systems: Canon EF, Nikon F, Sony A, Sony E, and Micro Four Thirds, making it a versatile special-effect tool that can follow you across different camera platforms. There is no image stabilization and no filter thread, so users should factor those limitations into their workflow planning.
If you are shooting on an APS-C mirrorless system and want a dedicated fisheye prime with broad mount flexibility, this Lensbaby offering is worth serious consideration.
Pros — Lensbaby Fisheye Lens for Fujifilm X
- ✓Broad mount compatibility covering Canon EF, Nikon F, Sony A, Sony E, and Micro Four Thirds systems
- ✓Compact prime design at a fixed 5.8mm focal length — no zoom complexity
- ✓Maximum aperture of f/3.5 for a fisheye prime lens
Cons — Lensbaby Fisheye Lens for Fujifilm X
- ✗Fully manual focus only — no autofocus support whatsoever
- ✗No image stabilization, which can be a challenge in handheld low-light scenarios
- ✗No filter thread available, limiting use of traditional screw-on filters
Reviews — Lensbaby Fisheye Lens for Fujifilm X
Videos — Lensbaby Fisheye Lens for Fujifilm X
Lensbaby 5.8mm f/3.5 Circular Fisheye lens review with samples (full-frame and APS-C) — Christopher Frost


