Monocular 8x-100x 40mm-100mm C-Mount Zoom-Glass Lens Eyepiece Suitable For Industry Lab- Microscope Camera Features Work distance: 40mm-100mm.Size: 115mm L X40mm C-mount Lens , visual field :4mm-30mm.Magnification power by 0.12-2X (about 8X-100X on the display).Easy to carry , weigt and small in size , so you can carry it out easily.Specifications:aluminum alloy- Working distance: 40mm-100mmVisual field: 4mm-30mmPackage Includes:1xC-Mount LensNote:Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item.