please examine pictures. these lenses are mainly for industrial applications however last picture as example of set up that can be made for working on pcbs. will require a suitable camera and software. This can be used to magnify existing camera set ups. this listing is for 21k. I also have 15k and 19k, last one I will be listung soon with stand and camera as pictured in the last photo. you will only be getting 21k lense as pictured in the first photos. please see my other items as I am getting rid of all of my electronic equipment and things I've acquired over the years.
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