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Opteka 6.5mm f/2 Ultra-Wide Fisheye Lens

The Opteka 6.5mm f/2 is a 6.5mm f/2 lens designed for Canon EF, Nikon F, Sony E, Micro Four Thirds mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Opteka 6.5mm f/2 Ultra-Wide Fisheye Lens

Opteka 6.5mm f/2 Ultra-Wide Fisheye Lens

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Lens Overview — Opteka 6.5mm f/2

The Opteka 6.5mm f/2 Ultra-Wide Fisheye Lens is a prime, manual-focus fisheye lens designed for APS-C format sensors. With a fixed focal length of 6.5mm and a maximum aperture of f/2, it sits in the ultra-wide angle category and delivers the dramatic, immersive perspective that fisheye optics are known for. The lens is available in four mount options — Canon EF, Nikon F, Sony E, and Micro Four Thirds — making it a versatile choice across a wide range of camera systems.

At just 295 grams, it's a compact and lightweight option that won't add significant bulk to any of these compatible setups. As a fully manual lens, focus is handled by the shooter rather than the camera's autofocus system, which suits deliberate, creative shooting workflows. There is no image stabilization, so steady technique or a stable platform is recommended, especially in lower light situations.

The f/2 maximum aperture is a genuine strength for a fisheye lens at this focal length, offering meaningful light-gathering capability for available-light and low-light shooting. With no filter thread listed, the optical design does not accommodate standard screw-on filters.

Key Features — Opteka 6.5mm f/2

6.5mm Fisheye Prime: Fixed 6.5mm focal length delivers a dramatic, curved ultra-wide perspective characteristic of fisheye optics on APS-C sensors.

f/2 Maximum Aperture: Wide f/2 aperture gathers substantial light for a fisheye lens, making it usable in low-light and available-light situations.

APS-C Format Coverage: Designed specifically for APS-C sensors, producing the full circular or near-circular fisheye effect the format allows at this focal length.

Multiple Mount Options: Available in Canon EF, Nikon F, Sony E, and Micro Four Thirds mounts, covering a broad range of compatible camera systems.

Manual Focus Only: Focus is controlled entirely by the shooter via the focus ring, suited to deliberate, creative shooting rather than fast-moving subjects.

Lightweight Build: At 295g, the lens adds minimal weight to any compatible mirrorless or DSLR body.

Lens Specifications — Opteka 6.5mm f/2

Opteka 6.5mm f/2 full specifications
SpecDetail
Use CasesTravel, Astrophotography, Creative Effects
Lens TypeFisheye
FormatAPS-C
Zoom/PrimePrime
Focal Length6.5mm
Maximum Aperturef/2
Lens MountCanon EF, Nikon F, Sony E, Micro Four Thirds
AutofocusNo
Focus TypeManual
Image StabilizationNone
Weight295g

Description — Opteka 6.5mm f/2

The Opteka 6.5mm f/2 Ultra-Wide Fisheye Lens is a prime lens built for APS-C format cameras, offering a fixed 6.5mm focal length in the ultra-wide angle fisheye category. With a maximum aperture of f/2, it provides solid light-gathering performance for a lens of this type. Focusing is entirely manual, with no autofocus capability across any of its supported mounts.

The lens is offered in four mount configurations — Canon EF, Nikon F, Sony E, and Micro Four Thirds — giving shooters across multiple ecosystems access to the same fisheye perspective. Weighing in at 295 grams, it remains a manageable addition to any camera bag. There is no image stabilization on board, and no filter thread is provided, so standard screw-on filter accessories are not compatible.

For photographers interested in manual-focus fisheye work on a crop-sensor system, this lens covers a broad range of popular camera platforms from a single product line.

Pros — Opteka 6.5mm f/2

  • ✓Wide f/2 maximum aperture provides strong light-gathering for a fisheye prime
  • ✓Broad mount compatibility across Canon EF, Nikon F, Sony E, and Micro Four Thirds systems
  • ✓Lightweight at 295g, keeping the overall kit weight manageable

Cons — Opteka 6.5mm f/2

  • ✗Fully manual focus only — no autofocus support on any compatible mount
  • ✗No image stabilization, requiring steady technique especially in lower light
  • ✗No filter thread, ruling out standard screw-on filter use

Videos — Opteka 6.5mm f/2

NEW BMX FISHEYE LENS! // Quick Review of the Opteka 6.5mm — Wasley Schultz

Resources & Downloads — Opteka 6.5mm f/2

Manuals & Guides

Frequently Asked Questions — Opteka 6.5mm f/2

Which camera mounts is this lens compatible with?+
The Opteka 6.5mm f/2 is available in Canon EF, Nikon F, Sony E, and Micro Four Thirds mounts. This covers a broad range of APS-C format cameras across multiple brands and systems.
Does this lens support autofocus?+
No. The lens is manual focus only. There is no autofocus mechanism regardless of which mount version you choose, so all focusing is done manually by the photographer.
Is this lens compatible with full-frame cameras?+
The lens is designed for APS-C format sensors. While it may physically mount on some full-frame bodies depending on the mount version, the image circle is specified for APS-C and is not intended for full-frame use.
Can I use filters with this lens?+
No filter thread size is listed in the specifications for this lens, which means standard screw-on filters cannot be attached to the front of the lens.
How heavy is this lens?+
The Opteka 6.5mm f/2 weighs 295 grams, making it a relatively light option that should balance comfortably on most APS-C mirrorless and DSLR bodies.
Does the lens include image stabilization?+
No, the lens does not include any image stabilization. Photographers shooting in lower light or at slower shutter speeds should plan accordingly with steady technique or camera support.

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