The Lukas LK-7900 Ace was released in early 2013 by the Korean manufacturer Qrontech. The camera has very good picture quality during the day and good picture quality at night. The night videos, while good are not the greatest. Before investing in this camera watch many night videos to see if it is acceptable for your needs. It records 1080p at 30f/s with an average bit rate of approximately 10,000kpbs. The camera utilizes a Sony Exmor CMOS sensor.
The unique feature of this dash cam is the ability to accept SDXC cards (max 128GB). This gives potentially 4 times the recording capacity of a traditional dash cam allowing approximately 29 hours of recording time before deleting the oldest video file.
This camera comes with a G-sensor and built-in GPS. Qrontech claims this camera has a very high temperature capability at approximately -20°C to 80°C operating and -30°C to 9°0C storage.
There is an optional circular polarizing lens (CPL) that can be purchased which helps reduce reflections and glare when shooting in sunny weather. The camera has a threaded 37mm lens that allows you to purchase a variety of filters if you want to tweak the video quality. These can be purchased from a variety of sources and not only Lucas. If you do opt for a CPL, it is recommended to remove it for night recording otherwise the video will be dark.
To date, Qrontech has been very responsive to user requests and has released updated firmware numerous times. This is a refreshing surprise since many of the Korean manufacturers have not had the best customer service reputation and some rarely release firmware updates to address major issue.
The dimensions of the camera are 90x70x48mm, which is not too large. However many owners indicate that it is bulky and is larger in person than the pictures would have you believe.
Here is a comparison of the Lukas LK-7900 Ace with a FineVu CR-500HD.
This camera has recently been released and there have not been any major problems reported yet.
One owner has indicated that the auto white balance handles fluorescent lights well, but doesn’t perform as well with incandescent bulbs. This gives the videos a yellow cast.
A common complaint from owners is the flimsy mount of the Lukas LK-7900. If you detach and attach your camera frequently, this mount may break.
Mounting the Camera
The following video shows how the camera can be connected to the mount and removed from the mount.
Comparison of LK-7900 (left) with FineVu Pro (right)
The latest viewer software for the Lukas LK-7900 Ace can be found on the Lukas website and is updated frequently.
Should I Purchase?
There are many Korean cameras competing at the high end of the market. The LK-7900 is a great choice in the $200 to $250. The video quality is quite good and most owners are very pleased . The internal GPS, parking mode, 128GB SXDC support and wide operating temperature range are very attractive features.
The manufacturer also appears to be quite responsive to user feedback and releases firmware updates to address concerns (somewhat rare for a Korean manufacturer). When mounted high on the windshield, the camera isn’t too noticeable but it also isn’t the most discreet camera. Reliability so far has been very good. Overall, this is a best buy for a higher end camera. See our complete comparison on the dash cam comparison page.
Where to purchase for lowest price
This camera sells on Amazon and eBay for approximately $225. These are the most popular vendors:
Another listing from Greensum on eBay. Check both listings for price and accessories since they sometimes change.
There are also more expensive listings on eBay that come with some accessories. Just search on LK-7900 to see what is currently available.
Note that prices are frequently changing so check all sources before ordering. If you find a lower priced option, please post in our forum.
WARNING! MAKING CHANGES TO YOUR FIRMWARE ARE PERFORMED AT YOUR OWN RISK. WE ARE NOT RESPONSIBLE FOR ANY DAMAGE TO YOUR DASH CAM AS A RESULT OF THESE INSTRUCTIONS.
Firmware Update Instructions
- Download the firmware update file
- Back up important data then start formatting. (Recommended memory allocation based on Windows7 is 64KB) (Those who use 64/128GB memory card, do format through Lukas Viewer)
- Copy unziped download file into SD card
- Start the car engine. (to prevent power cut-off while updating)
- Turn on the Black box. When ‘SD_Fail’ appears on the segment window, insert SD card.
- ‘Upda’ appears on the segment window with a voice guidance.
- After the update is complete, it automatically reboots.
- The update is complete. (Black box operates after a self-format itself. (In case of ‘Memory allocation 64KB based on Windows7 excepted)
The latest firmware version can be found on the Lukas site and is updated quite frequently.
Unbricking your LK-7900
WARNING! UNBRICKING YOUR CAMERA IS PERFORMED AT YOUR OWN RISK. WE ARE NOT RESPONSIBLE FOR ANY DAMAGE TO YOUR DASH CAM AS A RESULT OF THESE INSTRUCTIONS.
Some users have unfortunately “bricked’ their LK-7900 cameras when trying to upgrade firmware. Qrontech has developed a special 4GB SD card that can unbrick these cameras. One of our members, superpat, has shared an image of this SD card. The 55MB zipped image file of this SD card can be downloaded here.
There are two visible files, dm3xx.dat and a config.bin. There may be more files on this card as there are two partitions even though you can only see one.
When you run the unbricker it installs AC23, as that was current when the card was created.
- Use the Linux dd command or use Win32 Disk Imager to write your new SD card with the provided image
- Switch the power of the black box Off
- Insert the SD unbricker card
- While pressing M button of black box, turn the power of the black box ON, Keep the M button pressed for about 10 seconds then release
- After a-couple-of-minute-long processing, black box will say to format the SD card. Ignore the message and turn the black box off.
- Try to update the unbricked AC23 to AC29 as normal.
- If it bricks goto 1
You can download the English manual here.
Published: May 2, 2013
Last Updated: October 5, 2013