Rokinon

Rokinon RK8MV-NEX 8mm T3.8 Cine Fisheye Lens - Sony E-Mount

4.7 (3 reviews)

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

The Rokinon 8mm T3.8 Cine Fisheye lens is a video-optimized version of the well-regarded Rokinon 8mm F/3.5 fisheye, sharing the same multi-element optical design while adding features that videographers demand. The de-clicked aperture ring is the headline upgrade, allowing smooth and silent aperture transitions from T3.8 to T22 without the click stops that would cause jarring exposure shifts in footage. The use of T-stop markings instead of F-stops means exposure settings reflect actual light reaching the sensor, making it easier to match this lens with other cine glass on multi-lens shoots.

Mounted on Sony E-mount APS-C cameras, the lens delivers a full 180-degree diagonal field of view with edge-to-edge coverage, ideal for immersive establishing shots, action footage, skateboarding and extreme sports content, real estate interiors, and creative music video work. On full-frame Sony bodies, it produces a dramatic circular fisheye image that can be used for artistic effect or cropped in post. Focus is fully manual with a smooth, well-damped focus ring that suits follow-focus rigs. This is a specialty optic by nature — the extreme barrel distortion and ultra-wide perspective make it a powerful creative tool, but it is not intended to replace a standard wide-angle lens for everyday shooting.

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

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.
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.
This is a fully manual lens — both focus and aperture are controlled manually via the lens barrel, giving videographers precise hands-on control.
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.
This version is built for the Sony E-mount (NEX) system and fits both APS-C and full-frame Sony mirrorless cameras.