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⚡ Light up your shots with precision and speed — never miss the perfect exposure again!
The Sekonic Speedmaster L-858D-U is a professional-grade light meter designed for photographers and cinematographers demanding exact flash and ambient light measurements. Featuring a built-in 1° spot viewfinder, it offers precise highlight and shadow analysis, while its flash duration measurement supports high-speed sync (HSS) for advanced motion freezing. With an extended EV range from -5 to 22.9 at ISO 100 and compatibility with major wireless flash triggering systems, this meter streamlines exposure control in complex lighting setups. Its intuitive touchscreen interface and durable accessories make it an essential tool for high-end studio and location shoots.





| ASIN | B06XD9K7PC |
| Best Sellers Rank | #17 in Photographic Light Meters |
| Customer Reviews | 4.4 4.4 out of 5 stars (190) |
| Date First Available | March 2, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 8.8 ounces |
| Item model number | 401-858 |
| Manufacturer | Sekonic |
| Product Dimensions | 6.93 x 3.7 x 1.93 inches |
J**T
Essential tool for High Speed Sync.
Where to start here? Ok, I recently purchased some monolights with high speed sync ability, that I wanted to use with my D3. Outdoor usage, of course. I'm not big onto chimping over and over looking at the histogram to get a correct exposure. So I purchased a sekonic 208. Nice meter, for sure...easy to use. But it doesnt work with hss. Returned it. Did some research. The 858D is the only purpose built meter for hss. And it works, quite well, I might add. Accurate to a 1/10th of a stop. Has a 1 degree spot meter--fantastic. I know some people don't like the design, but I love it. Stop guessing and looking like a lower primate. Get this tool. It's worth every penny.
S**N
Speed up your workflow and increase accuracy
I’m a full time gaffer for film and music videos and this is a must have tool for anyone working in film or photography industries. I am much faster and more accurate when I light a scene now that I use this Sekonic Meter. Saves me time and it is much easier to recreate specific looks or match scenes from day to day. Mostly use the ambiance modes but for flash photography it is powerful as well. I highly recommend. I like the digital display and touch screen. It’s very clear to read and you can change the background colors which is nice. Don’t get a cheap meter this one is high quality.
P**N
update
goog but still I feel 758 is robust than this also just I was thinking why can't sekonic give a standard camera profiles update few popular brands like nikon /sony/cannon/hasselbd
B**E
Awesome Meter!
Awesome light meter!! I know enough about meters to use it, but the more I use it the more I learn about exactly what it can do, It can do a lot.
G**R
A must have for manual photo and video shooters.
If you use manual settings for photo or video work this is a must have item. Works well in low light and with flash configurations. Provides an accurate starting point eliminating guess works and is more reliable than most camera metering systems. Highly recommended.
A**R
Lots of option and versatility
I find the Light Meter to be quite professional with many options that I may not even use. However, I do wish that the system was more user-friendly as the menus can be overwhelming. It would be great if the option to personalize and hide certain menu items was available.
W**.
PIECE OF JUNK
PRODUCT WAS SENT TO ME NON-FUNCTIONAL, DIOPTRIC ADJUSTMENT DID NOT WORK!!! THIS ITEM AND YOUR REPRESENTATIVE DO NOT DESERVE ANY RATING AT ALL!!! THE ONLY REASON I RATED IT IS BECAUSE IT IS REQUIRED TO SEND THIS PHONY REVIEW!!!!!!!
B**N
In Reflected Light mode, exposure compensation gets stuck once you enter a value.
In Reflected Light mode, exposure compensation gets stuck once you enter a value. I entered +2 and the status bar showed ADJ +2.0. I wanted to but could not reset it back to 0 ==> 0. The setting was stuck at +2.0 ==> 0. After that, all spot metering measurements showed the + sign. With horror, I found that the only way to get support from Sekonic was via email even they say email and phone on their website. There was no support phone number to be found. Unbelievable! As the last resort, I reset the meter back to factory settings and the compensation was back to +0 ==> 0. The + sign in spot metering screen now was gone. Sekonic support is just so ... undesirable!
H**S
Sekonic es sekonic. Y este modelo con su accesorio para Godox, en mi caso, te acelera mucho el flujo de trabajo. Aunque la curva de aprendizaje con todo lo que tiene no es muy rápida para mí, sí lo vale.
G**E
I use it for running my photo and video business. It saves time and make my work more precise. I highly recommend it for any photo/video creators
J**M
I bought this mainly for HSS flash photography it works fine, having trouble getting it to 200 SS goes from 125 to 250 skips by 200 I miss the wheel
C**E
Buen producto
A**O
La marca se vende sola, me costó un poco de tiempo para volver a comprar mi medidor de luz, tenía otro antes que me robaron, pero ya paso, ahora tengo mi herramienta otra vez, llego en perfecto estado y con doble empaque para su protección, caja original en perfecto estado con todos sus accesorios.
Trustpilot
5 days ago
2 weeks ago