Basic AccessoriesThe AE Prism Finder FE401The Mamiya AE (Automatic Exposure) Prism FinderFE401 pentaprism guarantees a true, upright image andfeatures built-in electronic shutter control which ensuresaperture-priority, TTL automatic exposure metering whilein the A or AEL mode.<3-Way Metering System>The FE401 comes with three metering modes: averagemetering (AV), spot metering (SP). and AV-SP meteringcapable of automatically selecting AV or SP according tosubject conditions.The LED display in the viewfinder indicates correctexposure.If you forget to extract the Dark Slide when the finder isbeing used with the 645 PRO TL, an LED will flash awarning.Power Drive Grip WG401The motorized film transport mechanism is placed in anergonomically designed handgrip for speedy (2 f.p.s)and continuous shooting. Features include cable releasesocket, shutter release lock, multi-exposure switch, firstframe advance, battery check, and power connectorsocket for leaf shutter lenses. Uses 6 AA 1.5 V. batteries.AE Reflex Finder FK402This aperture priority, Keplerian type, automatic (AE)reflex finder features TTL auto or manual exposure withcenter weighted averaging. It offers upright, eyelevelviewing with unreversed image.Exposure is indicated by red and green LEDs.. A built-inadjustable diopter eyepiece can be set from +/-5 forviewing convenience without eyeglasses.Power Drive Grip WG 402This simplified, compact, lightweight grip uses one 6 V.lithium battery. It has a shutter release with lock andoffers single frame exposure mode.