62TECHNICAL INFORMATION/PHOTOGRAPHY TECHNIQUES continuedCLOSE-UP PHOTOGRAPHYFor shooting subjects which are located closer than the closestpossible focusing distance of the lens, Nikon offers a widevariety of close up equipment as shown below.In close up photography, depth of field is usually quite shallow.Thus, you should stop the lens down as much as possible whenphotographing a subject having great depthTo focus in close-up photography, use the matte portion of thescreen. Or replace the standard Type K2 focusing screen withthe Type B2 or E2 screen. (For details about interchangeablefocusing screens, refer to page 66.)To measure the exact distance between the subject and filmplane, use the film plane indicator ^~r which indicates the exactposition of the film plane inside the camera. The distancebetween the film plane and the lens mounting flange is exactly46.5 mm.Close-Up Equipment• Close-Up Attachment Lenses Nos. 0, 1, 2, 3T, 4T, 5T, 6T.These lenses screw into the front of the lens just like filters tomagnify the image Exposure metering can still be done at fullaperture without compensation.• Auto Extension Rings PK-11, PK-12, PK-13. These fitbetween the lens and camera body. Used singly or incombination, exposure determination is done at full aperturewith all Al-type lenses.• Bellows Attachment PB-6. The PB-6 is also attachedbetween the lens and camera body. Exposure is determinedby the stop-down method with centerweighted metering. Thebeauty of this accessory is that you can changemagnifications continuously by extending the bellows.• Micro-Nikkor 55mm f/2.8, 105mm f/2.8, 200mm f/4 IFlenses. These specially designed lenses for close-upphotography offer continuous focusing from infinity down to1/2X lifesize.