B00TS9QB0W Samyang 8 mm T3.1 VDSLR Manual Focus Video Lens for Sony-E

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Features the latest generation multi-layer anti-reflection ultra multi-coating (UMC) to minimise flare and ghosting
Low dispersion (ED) and glass aspherical lens (AS) elements
De-clicked aperture movement and toothed focus and aperture rings provide smooth operation while shooting video.
180 degree wide angle of view
Compact size