
Rokinon
Rokinon RK8MV-NEX 8mm T3.8 Cine Fisheye Lens - Sony E-Mount
★★★★★
Rokinon 8mm T3.8 Cine Fisheye lens delivers 180-degree ultra-wide footage with smooth, de-clicked aperture for video shooters.
$269.00*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.
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Overview
Key Features
8mm ultra wide cine fisheye lens with 180 degrees angle of view
feature declicked aperture for easy video shooting
constructed of 10 elements for easy video shooting
works best with APS-C image sensors
Seamless aperture shifting from t3.8-t22
Specifications
Focal Length
8mm
Aperture Range
T3.8 – T22 (De-clicked)
Lens Type
Cine Fisheye
Angle of View
180°
Sensor Compatibility
APS-C (full coverage), Full-Frame (circular image)
Mount
Sony E-mount (NEX)
Focus Type
Manual
Pros & Cons
👍 Pros
- De-clicked aperture ring enables smooth, jerk-free exposure transitions during video recording
- 180-degree fisheye field of view captures extremely wide, immersive perspectives
- T-stop markings provide accurate light transmission readings for consistent cinematic exposure
- Compact and lightweight for an ultra-wide cine lens, keeping rig weight manageable
👎 Cons
- Fully manual focus and aperture with no electronic communication to the camera body
- Strong barrel distortion inherent to the fisheye design limits use for conventional straight-line shots
- Produces a circular image with heavy vignetting on full-frame sensors rather than full coverage
- Fixed Sony E-mount with no adapter flexibility for other camera systems
Frequently Asked Questions
What is a de-clicked aperture and why does it matter for video?
A de-clicked aperture allows smooth, stepless aperture adjustments instead of the click-stop increments found on photo lenses. This prevents visible exposure jumps during recording, which is essential for professional video work.
Does this lens work on full-frame Sony E-mount cameras?
Yes, though on full-frame sensors it produces a semi-circular fisheye image with exaggerated perspective rather than edge-to-edge coverage. On APS-C sensors, it provides full-frame 180-degree coverage.
Is this lens autofocus or manual focus?
This is a fully manual lens — both focus and aperture are controlled manually via the lens barrel, giving videographers precise hands-on control.
Why does this lens use T-stops instead of F-stops?
T-stops measure actual light transmission through the lens rather than the theoretical value of F-stops. This provides more accurate and consistent exposure readings, which is critical when matching exposure across multiple cine lenses.
What camera mount is this specific version designed for?
This version is built for the Sony E-mount (NEX) system and fits both APS-C and full-frame Sony mirrorless cameras.