User manual
Sekonic Speedmaster L-858D-U Light Meter

User Manual for Sekonic Speedmaster L-858D-U Light Meter

• Product category: Light Meters Sekonic
• Brand: Sekonic
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for Sekonic Light Meters

Product description

• Sekonic L858D CINE YT
• Sekonic L858D PHOTO YT

• Lumisphere receptor head rotates 90° right and 180° left and retracts for conversion to a flat diffuser.

• Integrated 1° spot viewfinder with full information display provides a precise method of measuring specific parts of a scene.

• Ability to measure flash duration within a range of 1/40 to 1/55,500 second using t0.1 to t0.9 settings.

• Improved sensitivity of the L-858D-U allows it to record a reading at just 0.1 lux illuminance as well as use expanded range of -5 to 22.9 EV for incident readings and -1 to 22.4 EV for reflected light. Also, it features an extended ISO range of ISO 3 to ISO 13,107,200 with an option available for ISO 850.

• Optional radio modules are available for PocketWizard and Elinchrom/Phottix systems for advanced wireless triggering and remote flash control.

• High-Speed Sync support allows photographers to accurately take readings while using HSS with their flashes and cameras.

• Flash Analyzing Function measure ambient and flash simultaneously to provide a percentage of flash in the final exposure. Users can then adjust the mix as the display shows camera settings and the relationship between the flash and ambient light in your exposure.

• Users can determine the dynamic range of their camera using optional targets by taking bracketed shots with their measurement data and they using the Sekonic Data Transfer Software to graph and then save the information to the meter.

• Expanded shutter speed ranges now allow for readings between 1/64,000 second to 30 minutes with ambient light and 1/16,000 second to 30 minutes for flash.

• A comprehensive set of cinema modes allows for settings of 1-1000 fps as well as shutter angles of 1-358°. Twenty user determined settings are also available that provide more precise options of 0.001-360° shutter angles and 0.001-99,999.999 fps.

• 2.7" color touchscreen LCD provides a fast and intuitive method for viewing and changing settings.

• Micro-USB port can be used for firmware updates, applying custom settings, and to use exposure profiling.

• The L-858D-U features an all-weather construction that is dust and splash proof (JIS Class 4).

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Technical parameters

Sekonic L-858D Specs

Meter Type

Ambient Cine Flash Spot

Spot Metering

1 Rating 84% users recommend this product to others. And what about you? This product has already been rated by 79 owners. Add your rating and experience with the product. Discussion Ask our technicians if you have a problem with your settings, or if anything is unclear in the user manual you have downloaded. You can make use of our moderated discussion. The discussion is public and helps other users of our website who may be encountering similar problems. Post new comment to Sekonic Speedmaster L-858D-U Light Meter Subject: Sekonic 858 light meter compatibility issue Date: 16.02.2021 12:08:09 Name: Keith Harrold I have a sekonic 858 light meter and it seems the pocket wizard plus 3 meter is not compatible? Do you have any ideas why this would be? I would greatly appreciate any advice or suggestions. Kindest Regards Keith Post reply Post a new topic / query / comment: Items marked with * are required. Your name *: E-mail : Subject *: Message *: Your email address will not be displayed. Do not forget to fill it in if you want to receive a reply to your enquiry/contribution. Processing of personal data in accordance with GDPR