Adopting 7 pcs and 5 groups of sonner optical structure, pure aluminum housing, brass multi-thread mechanical structure, support the yellow spot linkage. 35MM is relatively close to the human eye perspective, which can properly the expression relationship between the subject and the background. In addition, the small size may be the focal point used by photography enthusiasts, which is often placed on the camera as a hanging lens. Compact size, with a modest appearance, combined with pure aluminum shell body, good grip feeling. It is convenient to switch the aperture. The focusing ring feels moderately damped, which is conducive to the accuracy of focusing. Made of good quality aluminum alloy material, sturdy, anti-rust, wear resistant and durable.