LUMIX GH4 V-Log L Function Firmware Upgrade Kit DMW-SFU1


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  • LUMIX GH4 function enhancement for film production/professional videographers
  • Increases dynamic range from 10 stops to 12 stops
  • 8 bit internal to SD media or 10 bit to external media recording
  • Makes color grading easier with improved compatibility between LUMIX GH4 and Panasonic Varicam
  • V-Log / V-Log L were developed to feature similar characteristic to Cineon
  • SD card not included
  • Final sale, item not returnable
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In response to the demand from the film production market, log video recording (V-Log L) is now available for the LUMIX GH4, and offers exceptional flexibility as well as wider dynamic range for color grading in post-production process. V-Log / V-Log L were developed to feature similar characteristics to Cineon, which is a characteristic curve for film digitalization. Taking full advantage of Four Thirds sensor, V-Log L boasts a log characteristic with 12 stops. Both V-Log and V-Log L have the same characteristic curve, and LUT (Look Up Table) can be utilized.

LUMIX GH4 VLOG upgrade process

LUMIX GH4 VLOG upgrade process

  1. Purchase the key code kit DMW-SFU1 from this page.  This is not for immediate download, as its kit that will be shipped to you.
  2. Update a fully charged LUMIX GH4 with firmware Version 2.4 from the Global Joint Update Service. Click here to download.
  3. Export the camera’s serial number to an SD Memory Card by inserting the SD card into the camera and press [Menu] -> [Setup] -> [Activate] -> [Export Serial Code] to save serial code as "SERIAL.LST" file.
  4. Upload the SERIAL.LST file by inserting the SD card into your computer.  From the Update Portal Web Page use BROWSE to find and select "SERIAL.LST" file on the SD card. "SERIAL.LST" is saved in folder of PRIVATE > PANA_GRP > PAVC > LUMIX > ACTV > "SERIAL.LST then press [Upload] to proceed. 
  5. Input "Key Code" from the kit you purchased in "Upgrade Software Key" to this website to get activation code. [ Alphabet on key code must be big letter to input. Please be careful with misspelling such as 1 (one ) and I ( big letter of "i") or 0 (zero) and O ( big letter of "o") Please input key without hyphen (-). ]  Click Register
  6. ACTIVE.LST should auto download from the site. Save this file to the SD card in the folder PRIVATE > PANA_GRP > PAVC > LUMIX > ACTV .  
  7. Insert the SD card into the same fully charged LUMIX GH4 and press [Menu] -> [Setup] -> [Activate] -> [Import Activation Code]
  8. When prompted power cycle the camera.  You will find your new V-LOG L feature under the Menu “Photo Style”. 


Rated 3.2 out of 5 by 26 reviewers.
Rated 1 out of 5 by Cannot activate I bought a brand new v-log key code to use on a new GH4. I followed the instructions, and got "ERROR!!: The product of the serial code is already activated with another key code. Activated product can not be activated again with another key code of same functions." Now what do I do? October 19, 2016
Rated 3 out of 5 by Requires External Recorder Recording using V-LOG L via internally will be not so good. Well not exactly amazing, but more work to be done. The capabilities of 8-bit with the V-LOG L setting doesn't work too well. Now if paired up with an external recorder, recording in 10-bit, this package is definitely great. February 17, 2016
Rated 5 out of 5 by Nice update I agree with everyone on this, boggles my mind they sent a piece of paper by mail, and it was back ordered for a few weeks. It's just a number and the install process was very strange compared to past firmware upgrades. But it's worth it, because after doing just one shoot in vlog and using the varicam lut in premiere lumetri cc, fantastic results with just some minimal tweaking to get great results. Love how the highlights are so harsh. February 4, 2016
Rated 1 out of 5 by Footage is not useable at all V-log would be wonderful IF... you never filming walls, especially white wall or white things generally. Noise is not the problem. The real problem is the magenta or red artefacts if you film grey or white walls. Not useable footage - no way to use. I hope so much they will fix the problem in the next update, that should come soon. February 2, 2016
Rated 1 out of 5 by DMW-SFU1-VLOG, could not figure out how to use it I wated a week for the download code to be sent by Fedex, it could have been via e-mail, the industry standard. The instructions were in 100 differenrt languages were so small that I needed a magnifying glass, but still could not get understand them. I AM GUESSING THIS IS SIMILIAR TO A FIRWARE UPDATE, WHAT VERSION FIRMWARE IS NEEDED? January 1, 2016
Rated 5 out of 5 by Great feature, not so good execution Finally vlog for the gh4. However, I don't understand why it needs to be mailed. Also, the instructions aren't that clear. First, make sure your firmware is up to date. But the steps to download the camera's serial number to the sd card, upload to a Panasonic website, then copy the update to that same sd card and FINALLY install it on the camera are not very specific. And if you're battery is completely charged, literally, the camera will not start the install process. December 30, 2015
Rated 5 out of 5 by Digital Film maker Love it. I use this product every day and along with Film Convert I an able to get the most outstanding pictures out of my new favorite camera the Lumix GH 4. U have 2 get this! And shoot everything in V LOG get used 2 it and watch just how your vision comes true. December 23, 2015
Rated 3 out of 5 by Mixed feelings As an amateur shooter this profile was a good investment in that I get to experiment with a professional feature on a low budget camera. The complaints about properly exposing being difficult and only getting the full benefit from this with an external recorder have been true in my experience but then again, I am an amateur. The fact that I had to pay extra for it was very annoying because like others have mentioned, other manufacturers delivered similar features for free. But I'd buy it again for the learning opportunity. December 11, 2015
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