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AstrHori 6mm f/2.8 Circular Fisheye
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AstrHori · f/2.8 · Nikon Z mount

AstrHori 6mm f/2.8 Circular Fisheye

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Mount
KEY FACTS
BrandAstrHori
Release Year2025
Production StatusIn Production
Lens MountNikon Z
SystemNikon Z
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
Release Year
2025
Production Status
ⓘ
Current status of lens manufacturing (e.g., in production, discontinued).
In Production
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.
Nikon Z
System
ⓘ
Indicates which camera system the lens is designed to attach to.
Nikon Z
Maximum Format
ⓘ
Largest sensor size compatible with the lens.
Full Frame
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.

Physical

Lens Weight
340 g
Lens Length
ⓘ
How long the lens is from front to back.
61 mm
Front Filter Compatible
ⓘ
Some lenses are compatible with front filters, some are compatible with back filters and some are compatible with both. Front filters are usually more convenient to add and remove.
No

Optics

Focal Range
ⓘ
Shortest to longest focal length of the lens (zoom range start - end )
6 mm
Aperture Range
ⓘ
Largest aperture at the lens's shortest focal length to longest focal length (aperture range start - end)
2.8
Focal Length Angle of View
220°
Diaphragm Type
ⓘ
Structure and design of the aperture
Manual
Blades
ⓘ
Number of diaphragm blades in aperture
8020
Zoom Lens
ⓘ
Zoom allows you to vary the focal length, change between long shots and close-ups
No
Closest Focusing Distance
ⓘ
Minimum distance for a subject to be in focus.
8 cm01500
Autofocus Mode
No
Manual Mode
Yes
Manual Focusing Ring
Yes

Features

Built In Lens Hood
No
Image Stabilization
No

Construction

Elements
ⓘ
Lens elements refer to individual pieces of glass within the lens.
10
Groups
8
Low Dispersion
ⓘ
Elements that reduce chromatic aberration
2