This lens kit makes my Andonstar AD407 much more useful for PCB work by expanding the field of view and increasing the depth of field. PCBs with tall components often couldn't be fully focused, but I now have a depth of field of around 25mm (1 inch) which makes it much easier to work with PCBs without my tools going completely out of focus. And being able to tilt the board while you work without refocusing is awesome!
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