Pentax ME-F ME-F Manual - Page 68
speed/film
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METER COUPLING RANGE The meter coupling range of yoru ME-F assures accurate exposure reading over a broad range of shutter speed/film speed combinations. The working EV range of for both auto and manual exposure systms also varies with the lens in use and is reflected in the chart to the right. With the SMC Pentax AF zoom with ASA 100 film it extends from EV-1 (f/2.8 at 4 seconds) to EV 19 (f/16 at 1/2000th second; f/22 at 1/1000th second); with the f/1.4 50mm standard lens it runs from EV-1 (f/1.4 at 1 second) to EV-19 (f/16 at 1/2000th second; f/22 at 1/1000th second). You can calculate what the working EV range would be at other film speeds by mentally adjusting the accurate exposure coupling range. Simply move the ASA arrow at the right of the chart up or down and adjust the chart accordingly. At ASA 50 with the 50mm f/1.4 lens, for example, it would run from EV-0 (f/1.4 at 2 seconds; f/2 at 4 seconds) to EV-18 (f/22 at 1/500th second; f/16 at 1/1000th second). • 64