Apple 5420/180 用户手册
![Apple](https://files.manualsbrain.com/attachments/2c022a7d1a76dcd8f02c04aa8d97faf41b63902f/common/fit/150/50/8a691e9df6162751590e2cef93a951cf3a39c94b6949421016232655b22d/brand_logo.png)
Adjustments
Light Meter Setup - 2
from the lens.
Three scales are shown on
the light meter:
• 200-1000 fc
• 50-250 fc
• 10-50 fc
Because display screen
luminance typically ranges
from 10 to 50 fc, take
readings from the bottom
scale only.