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Opteka 6.5mm f/3.5 Fisheye

The Opteka 6.5mm f/3.5 is a 6.5mm f/3.5 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/3.5 Fisheye

Opteka 6.5mm f/3.5 Fisheye

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Lens Overview — Opteka 6.5mm f/3.5

The Opteka 6.5mm f/3.5 is a manual focus prime fisheye lens designed for APS-C sensor camera systems. With a maximum aperture of f/3.5 and a fixed focal length of 6.5mm, it sits firmly in the ultra wide-angle category, delivering the distinctive curved, immersive look that fisheye lenses are known for. The lens is available in four mount options — Canon EF, Nikon F, Sony E, and Micro Four Thirds — making it compatible with a broad range of DSLR and mirrorless bodies from multiple manufacturers.

Weighing just 330g, it is a relatively compact and lightweight option that won't add significant bulk to your kit. Focus is entirely manual, with no autofocus system present, which means shooters will need to manage focus by hand. There is no image stabilization on board either.

A 67mm filter thread provides the option to attach compatible front filters. For photographers interested in creative fisheye imagery across street, landscape, skateboarding, or action contexts, the Opteka 6.5mm f/3.5 offers multi-mount compatibility and a straightforward manual-only shooting experience at a fixed focal length.

Key Features — Opteka 6.5mm f/3.5

6.5mm Fisheye Prime: Fixed focal length delivers a consistent ultra wide-angle fisheye perspective with the characteristic curved, immersive distortion the format is known for.

f/3.5 Maximum Aperture: Moderate maximum aperture provides usable light gathering for outdoor and well-lit shooting conditions.

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

APS-C Format Coverage: Designed for APS-C sensor cameras, delivering full-frame fisheye coverage on crop-sensor bodies.

Manual Focus Only: No autofocus system is present, requiring the shooter to focus by hand throughout use.

67mm Filter Thread: Front filter thread accepts standard 67mm filters, allowing use of ND, polarizing, or other compatible accessories.

Lens Specifications — Opteka 6.5mm f/3.5

Opteka 6.5mm f/3.5 full specifications
SpecDetail
Use CasesAstrophotography, Creative Effects
Lens TypeFisheye
FormatAPS-C / DX
Zoom/PrimePrime
Focal Length6.5mm
Maximum Aperturef/3.5
Camera SystemDSLR
Lens MountCanon EF, Nikon F, Sony E, Micro Four Thirds
AutofocusNo
Focus TypeManual
Image StabilizationNone
Filter Thread67mm

Description — Opteka 6.5mm f/3.5

The Opteka 6.5mm f/3.5 is a prime fisheye lens built for APS-C sensor cameras, sitting in the ultra wide-angle focal length category. With a fixed focal length of 6.5mm and a maximum aperture of f/3.5, it delivers the sweeping, curved perspective that defines the fisheye look. The lens is offered across four mount options — Canon EF, Nikon F, Sony E, and Micro Four Thirds — giving photographers on a variety of systems access to this focal length.

Weighing in at 330g, it keeps your kit light without sacrificing the wide-angle reach. Focus is fully manual, with no autofocus or image stabilization on board, so it rewards shooters who are comfortable working with manual controls. A 67mm filter thread is included for those who want to pair the lens with compatible front-mounted filters.

Whether you're shooting creative portraits, architecture, or action from an exaggerated low angle, this lens offers a distinctive visual character tied directly to its fisheye design.

Pros — Opteka 6.5mm f/3.5

  • ✓Wide mount compatibility — available in Canon EF, Nikon F, Sony E, and Micro Four Thirds
  • ✓Lightweight at 330g, making it easy to carry for extended shoots
  • ✓Fixed 6.5mm focal length delivers a consistent ultra wide-angle fisheye perspective

Cons — Opteka 6.5mm f/3.5

  • ✗Manual focus only — no autofocus support for faster-moving subjects
  • ✗No image stabilization, which can be a drawback in lower-light handheld shooting
  • ✗APS-C format only, so it will not cover full-frame sensors

Frequently Asked Questions — Opteka 6.5mm f/3.5

Which camera mounts is the Opteka 6.5mm f/3.5 compatible with?+

The lens is available in four mount options: Canon EF, Nikon F, Sony E, and Micro Four Thirds. This covers a wide range of DSLR and mirrorless camera bodies across multiple brands.

Does this lens support autofocus?+

No. The Opteka 6.5mm f/3.5 is a manual focus only lens. There is no autofocus system built in, so all focus adjustments must be made by hand.

What sensor format does this lens support?+

The lens is designed for APS-C format sensors. It is not intended for use with full-frame camera bodies.

What filter size does the Opteka 6.5mm f/3.5 use?+

The lens features a 67mm filter thread, allowing you to attach compatible 67mm front filters.

Does this lens have image stabilization?+

No, the Opteka 6.5mm f/3.5 does not include any image stabilization. Shooters should be mindful of shutter speed when shooting handheld.

How heavy is this lens?+

The lens weighs 330g, making it a relatively lightweight option that adds minimal bulk to your camera setup.

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