Use Your Cellphone

Your cell phone’s camera can be a magnifying glass. Focus on the marking you want to read and go in for a close-up. You can pinch it open on your phone for a closer look. It is great for ceramics or prints, but a little difficult for metal because of glare. No need for a ruler and a magnifier. Now you can go to a show with a dollar bill (a 6-inch ruler) and a phone.