We have a lot of Mitutoyo Plan APOs floating around at work, sometimes they come up on ebay. If you can get your hands on a 5x or 10x those are great for quicki

We have a lot of Mitutoyo Plan APOs floating around at work, sometimes they come up on ebay. If you can get your hands on a 5x or 10x those are great for quickie high mag photography. Highly recommended.