Specifications: Back Adjustment: No
Arm Type: Armless
Mechanism Type: Height Adjustable
Infinite Lock: No
Knee Tilt: No
Tilt Tension: No
Pneumatic Gas Lift: Yes
Upright Lock: No
Seat Slider: No
Chair Base: Chrome 25 Inch
Casters: Dual Wheel Nylon 2 Inch
Weight Capacity: 275 lb
Type: SIGMA 30mm f/1.4 DC DN Contemporary Lens for Sony Mirrorless Cameras and APS-C format e-mount The lens is made in Brazil and features a maximum aperture of f/1.4, high-quality optical design with aspherical and high-refractive index elements, and a stepping AF motor for smooth, near-silent autofocus.