Shelf Bracket -0.3X Aux Barlow Objective For 1-7/8 Stereo Microscope Highlights Generic Brand 0.3X Aux Barlow Objective For 1-7/8 Stereo Microscope Description: Auxiliary 0.3X barlow objective for stereo microscope. If the maximum magnification of your stereo microscope is 30x, this item can increase it to 9x! Enlarge the field of vision. Significantly increase the working distance. Attach this objective to the microscope body to reduce magnification, increase working distance and field of view. 1-7/8" (48mm) mounting thread, easy to attach to a lens - just screw it in. Specification: Magnification: 0.3X Working Distance: 278mm Mounting Thread: 1-7/8" (48mm) , M48 Color: black Material: metal Package includes: 1 piece 0.3x Barlow auxiliary lens WD278