3) measuring area, 4) diopter scale compensation, P40) – Sekonic Speedmaster L-858D-U Light Meter User Manual

Page 54: Warning

4. Basic Operations

Measuring Area

The measuring area is the inside of circle in the

viewfinder.

The light receiving angle is 1 degree.

Diopter Scale Compensation

While looking through the viewfinder, adjust the diopter by

rotating the Viewfinder Eyepiece

so that the circle and

digital display can be seen clearly.

(The setting range is -2.5 to 1.0 D.)

WARNING

Be careful not to directly look at the sun or bright light sources during

measurement.

This may cause a serious eye injury or lead to blindness.

NOTE

<> (Accessory sold separately)

You can attach a filter to the objective lens side using the step-up ring

(30.5 mm → 40.5 mm). This allows you to determine the exposure without

specifying the filter compensation value of the PL filter, etc., which is a

burdensome task.

The step-up ring can also be used as a hood to protect the lens part from

damage or dirt and prevent an incorrect measurement due to lens flare or

Viewfinder Display

Circle

Viewfinder Eyepiece