Free Express Shipping! NiSi ATHENA PRIME 25mm T1.9 Full-Frame Lens (E Mount, Drop-In Filter) Full-Frame - T1.9 to T22, 80mm Front Diameter, 10 Aperture Blades, 0.8 MOD Focus and Aperture Gears, 300° Focus Rotation, Lens Markings in Feet and Meters