Sekonic L 858D printed manual. Sekonic L 858D manual. Add to Cart. Description: Sekonic L858D. Price: $17.95. Stock type: Printed Instruction Manual.Downloads. Looking for the latest firmware, software or manuals? Select your meter from the drop-down below for latest updates. Sekonic 401-858. Manuals and User Guides for Sekonic 401-858. We found 2 manuals for free downloads: Installation manual Please read this operating manual thoroughly to gain a full understanding of the contents and ensure safe and correct use of this product. The SPEEDMASTER L- View the manual for the Sekonic SpectroMaster L-858D here, for free. This manual comes under the category Light Meters and has been rated by 1 people with Sekonic SPEEDMASTER L-858D / L-858D-U Operating Manual - Page 1. Document Details: 224 pages, 6.63 MB filesize. ← Swipe to Navigate →. Light Meter.