Check the listing for details. Johnson Standard Exposure Calculator Artificial Light Exposure Calculator. Condition: Used. Listed at 22.95 USD. What I have up for auction is a very nice, used set of Johnson Exposure Calculators. This is a pair of Johnson Calculators, one is the Standard Exposure and the other is the Artificial Light Exposure. No issues at all. Please email me with any questions. Thanks, and good luck. Please remember to leave feedback so that I can do the same for you. Canadian Residents: Taxes are not included in the price, and will be calculated at the end of the sale. International Buyers-Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.Also, due to high volumes of fraudulent claims, shipping rates have changed. Small Packet International Air mail will not be available to all countries. The new service Tracked Packet will be available, but the cost has increased a fair bit. Please inquire before buying.