The Seiko Studio Deluxe III L-398A light meter is a portable light meter that uses an AMORPHOUS PHOTOSENSOR (non-crystalline photosensor) as the light measuring element, which can be powered without additional power (no battery). The light meter has a freely rotatable light head, a mechanical stopwatch design, a measurement button lock function, and a memory index function. The light meter can also use incident measurement and reflection measurement. When a specific sensitivity and shutter speed have been selected, the direct reading plate (optional) can be used to directly determine the aperture value.
The Sekonic L-398A Studio Deluxe TL is a professional light meter designed for photography and studio lighting. It features an amorphous photosensor that requires no battery, allowing for direct exposure determination. The device includes a rotating light meter head and a mechanical dial for easy operation and light balance setting. This manual is written in Chinese.
| Incident Range | EV4 to 17 |
|---|---|
| Reflected Range | EV9 to 17 |
| Shutter Speed Range | 60 to 18000 sec |
| Exposure Constant (Incident) | C=340 (Diffuse Dome), C=250 (Flat Diffuser) |
| Exposure Constant (Reflected) | C=123 |
| Storage Temperature | -20°C to 60°C |
No, it uses an amorphous photosensor that does not require an additional power source.
The constant is C=340 for the diffuse dome and C=250 for the flat diffuser.
The reflected light measurement range is EV9 to EV17.