- 【12 Elements in 9 Groups & Ideal Aperture】: Its optical system consists of 12 elements in 9 groups. Aperture range: F2 – F22, ideal aperture with 10 diaphragm blades.
- 【2 aspherical glasses & 2 low wave high refractive glasses】: Improve contrast and color rendering in a variety of lighting conditions. Its UMC layer achieves the uniform light transmission, which reduces flare and ghosting.
- 【Durable, Compact & Portable】: Metal body, only weight 0.66lb/300g. Anodizing coloring design, which enhances the lens anti-corrosion, an-dirt functions, and its varnish not easy to removed.
- 【Brass Lens Mount & Chromed Copper Mount Design】: The chromed copper mount is resistant to abrasion and corrosion.
Lens construction: 12 elements in 9 groups
Focal length: f=12mm
35mm format equivalent: （18mm(Sony）18（Fuji）19（M4/3) 18(Nikon Z Mount）
Angle of view: 97°
Max. aperture: F2
Min. aperture: F22
Number of of blades : 10(rounded diaphragm opening)
Focus range: Approx. 20cm/0.66ft – ∞
External dimensions: ø66mm x59.5mm
Weight (excluding caps and hoods): Approx. 300g