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AstrHori 6mm f/2.8 Circular Fisheye
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UNSCORED
AstrHori · 6 mm · Sony E, Nikon Z, Canon RF, Leica L mount

AstrHori 6mm f/2.8 Circular Fisheye

From $299 — 1 offer
KEY FACTS
BrandAstrHori
Announcement dateAug 2025
Released2025
Production started2025
Production statusIn Production
What We Like
+Exceptional 220° ultra-wide field of view captures entire sky for astrophotography
+Sharp center sharpness even at f/2.8 with smooth manual focus ring and clicked aperture
+Compact and lightweight at 340g, easily portable for specialized shooting
+Excellent low-light performance with fast f/2.8 aperture ideal for night sky and Milky Way
+Solidly built metal construction with professional feel
+Outstanding close focus capability at 0.08m enables creative macro-style fisheye shots
Worth Knowing
−Manual focus ring lacks precision—turns too easily and can slip out of position with slight touch
−No filter support due to massive front element bulge
−Extreme distortion and composition challenges—difficult to keep feet, hands, and tripod out of frame
−Limited video utility as top and bottom portions of circular image get cropped

General

Brand
AstrHori
Announcement date
ⓘ
Refers to the date the manufacturer publicly announced the upcoming release and general specs of this camera.
Aug 2025
Released
ⓘ
Refers to the year this camera was officially made available for sale.
2025
Production started
2025
Production status
ⓘ
Current status of lens manufacturing (e.g., in production, discontinued).
In Production
Read our notes on general
The AstrHori 6mm f/2.8 Circular Fisheye is a specialized manual-focus ultra-wide for full-frame mirrorless cameras, delivering an extraordinary 220° field of view that captures the entire sky in a single circular image. Optically sharp in the center and solidly built at just 340g, it excels for astrophotography and creative landscape work, though its extreme distortion and loose focus ring demand deliberate technique and limit mainstream appeal.

Optical

Aperture Range
f/2.8 to f/16
Field of View
220° diagonal (circular)
Optical Design
10 elements in 8 groups with HRI/low-dispersion elements

Focus

Type
Manual focus
Autofocus
None

Build

Construction
Metal/alloy with frosted finish
Image Stabilization
None (no OIS)

Compatibility

Sensor Coverage
Full-frame
Filter Support
None (large front element incompatible with standard filters)

Optics

Min focal length
6 mm
Max focal length
6 mm
Focal range
ⓘ
Shortest to longest focal length of the lens (zoom range start - end )
6 mm
Zoom lens
ⓘ
Zoom allows you to vary the focal length, change between long shots and close-ups
No
Blades
ⓘ
Number of diaphragm blades in aperture
8020
Closest focusing distance
ⓘ
Minimum distance for a subject to be in focus.
8 cm01500

Physical

Lens weight
340 g
Lens length
ⓘ
How long the lens is from front to back.
61 mm
Lens mount
ⓘ
The lens mount will tell you what type of lens range you can fit onto the camera body. Often the same camera company will have different lens ranges for different cameras.
Sony E, Nikon Z, Canon RF, Leica L