Sekonic L-758D - Manual (Page 20)

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4. Basic Operation
4. Reflected Measurement Mode (spot metering)
This method measures the brightness (luminance) of the
light reflected from the subject. It is useful for distant objects
such as landscapes, when you cannot go to the position
of the subject, or for metering subjects that generate light
(neon signs, etc.), highly reflective surfaces or translucent
subjects (stained glass, etc.).
1. Take the measurement by aligning the circle inside the
viewfinder with the subject area to be measured.
2. The black circle A in the finder indicates the measure-
ment range. The light receiving angle is 1 degree .
< Diopter Adjustment >
Turn the eyepiece @2 and adjust the diopter so that the circle in the finder is clearly visible when
you look into the finder.
< Step-Up Ring (Lens Hood)> (optional)
The step-up ring (30.5mm
→
40.5mm), available as an optional accessory, makes it possible to
mount step-up rings and filters. This simplifies the setting of exposure without the troublesome
correction calculation of polarizing filters, etc. (see page 52)
The step-up ring can also be used as a lens hood to prevent lens flare and erroneous light
measurements from glare, it also protects the spot lens from scratching, soiling, etc.
A
(Display in spot viewfinder)