This is a new, deadstock item. I think it's just the right size to hang around your neck for field observation without feeling heavy. The lens can be removed by turning the screw, allowing for maintenance such as cleaning. ★Magnification★ For observing and identifying small items indoors, especially minerals and gemstones, a magnification of 20x or more is recommended. However, for outdoor nature observation, high magnification can be inconvenient due to the narrow field of view. Outdoors, if you want to carry it around and observe various things without limiting your subjects, such as mineral crystal faces, insect faces and legs, and the fine structures of plants, "10x" is the most user-friendly magnification. You can ship it immediately because the Yu-Packet Post mini-exclusive envelopes are now readily available! Thank you for viewing. #MineralCollecting #FossilCollecting #MineralGathering #Pegmatite