National Bureau of Standards, A TEST of LENS RESOLUTION for the PHOTOGRAPHER $8 including shipping to USA address for PayPal add $.60 Consists of one calibrated test target and a reprint of a 16 page 6x9 inch booklet that describes a test that will tell you how to calculate resolution in line pairs per millimeter based on a simple practical photographic test. The target is the original made by NBS. I have a few of these. I am happy to sell items on APUG and I make a contribution to APUG. To make this work please: To buy send me a private message (PM) with your email address for use in communicating; I will provide my email address via PM. If you use PayPal I will ship to the address PayPal provides. Books to US adresses are via MEDIA MAIL, USA only. For shipping I will charge you what the USPS charges me. When you pay tell me what you are buying!.