10.5X stereo microscope assisted objective lens, effectively enlarged the field of view. 2Significantly increase working distance up to 165mm. 3Easy to attach on objective, just screw it on. 4This lens comes with a 1-1/8 5Double the magnification of original objectives, a very practical objective lens accessories.Features:0.5X stereo microscope assisted objective lens, effectively enlarged the field of view. Significantly increase working distance up to 165mm. Easy to attach on objective, just screw it on. This lens comes with a 1-7/8" (48mm) mounting thread. Double the magnification of original objectives, a very practical objective lens accessories. Specification:Material: Metal, Aluminum alloy, Glass LensModel: KP-0.5XWeight: 85g/3ozMagnification: 0.5XStereoscopic microscope objective lens: 0.3 timesWorking Distance: 165mmMounting Thread Size: 48mm/1.9inchPackage List:1* 0.5X Auxiliary Objective Lens