Nikon Elw instruction manual TTL Exposure Meter

TTL EXPOSURE METER-Continued

•How to read the EV range chart

The chart indicates the EV (for ASA 100) vs. shutter speed range.

To determine the shutter speed range, note that the bars in section A indicate the responsive range of the ELW's photosensitive CdS element (i .e. , f/8 covers EV6-22, f/16 covers EV8-22) for the f-stop in use.

In Section 8, note the f-stop being used on the appropriate ASA scale. For example, at ASA 25 with the lens set at f/8, we follow the line diagonally and find that it intersects EV6 at four seconds, and at EV18 runs off the scale at 1/1000 second. ASA 100 at f/8 runs from EV4 at four seconds to EV 16 at 1/1000 second.

In any case, it is generally the low end which requires a careful check. The wide exposure (EV) range of the Nikomat EL W will encompass most lighting situations. It is only under dim-light or rare bright-light situations that any special atten- tion need be paid.

Full-aperture metering

The metering range is determined by the bars (Section A), fl number range in appropriate ASA scale (Section 8) and shutter speed (4 - 1/1000 sec., Section C). For example, the green area encompassed by the heavy lines demonstrate a

.combination of an filA lens and ASA 100 film.

Stop-down metering

The metering range is determined by the bars (Section A), flnumber in appropriate ASA scale (Section 8) which corresponds to the stopped- down aperture in operation, and shutter speed (4 - 1/ 1000 sec., Section C). The green line demonstrates stop-down measurement in the case of an f/8 lens combined with ASA 100 film, indicating a range from 1 sec. to 1/1000 sec.

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