![]() Keep in mind, though, that lower resolution video takes up less space. ![]() A 256GB card, the largest capacity the Nextbase accepts, can hold up to 12 hours. The Nextbase 622GW, our top pick, can store up to 5.5 hours of 4K footage on a 128GB card before deleting older videos. The difference between the default MicroSD card that may or may not come with your camera and the larger card you purchase on your own can be massive. By using the largest possible card, you decrease the possibility of accidentally losing an important video. All dash cams feature “loop recording,” so they start to delete old video files when they run out of storage to ensure they can always record something important. Some dash cams will come with a small MicroSD card–16-32GB–but we always recommend springing for the largest MicroSD card your dash cam will accept. This will allow you to remove the card and transfer files whenever you need them. Most dash cams primarily rely on MicroSD cards to store footage locally. It’s important to understand how your dash cam stores the footage it records, and how you can transfer it to other devices for safekeeping. While video is often most crucial in analyzing crash footage, audio can also be telling. Lastly, you’ll want to make sure your dash can capture audio in addition to video. Our experts recommend using a 140-155 degree field of view to achieve the best balance between coverage and picture quality. Ideally, you should look for a camera that covers a wide enough area to take in the full width of your windshield, but not so wide that the video looks distorted. You should also pay attention to your dash cam’s field of view, which indicates how much peripheral coverage it can capture. All of the models we’ve included here offer a competent “night vision” mode, which enhances clarity in low light, when contrast is minimal. Higher definition doesn’t automatically translate to better video quality, though, especially in challenging lighting conditions. “When pixel information is sparse, it’s very difficult, if not impossible, to enhance a video to identify a vehicle or recover a license plate,” says Primeau. A 4K UHD video is made from four times as many pixels as the same thing shot in 1080p. If you’re looking at budget-conscious models, look for “Quad High-Definition” (QHD), also known as 1440p. ![]() Ideally, your dash cam should shoot in “4K Ultra High-Definition” (4K UHD). With higher quality video, you can see more detail at a glance, which can be important when you only catch a crucial detail on camera for a moment. The first thing you should check on any dash cam is its video resolution. He frequently reviews dash cam footage when investigating automobile accidents on behalf of insurance companies, police departments and other organizations. Of course, not all of Primeau’s work makes international news. He’s contributed commentary and analysis on forensic evidence from many high-profile investigations to news media organizations across the country. Primeau): Ed Primeau is an audio and video forensics expert and the founder and co-owner of Primeau Forensics. Desai holds a Master of Science in Automotive Systems Engineering with a specialty in Vehicle Safety from Kettering University. He works with dash cam footage and data to test vehicle safety. The Expert (Elvis Desai): Elvis Desai is a Senior Forensics Engineer at YA Engineering Services, specializing in automotive accident reconstruction. I’ve reviewed cameras of all shapes and sizes for Digital Photography Review, Best Products, and the Wall Street Journal, among others. The Expert (Dan Bracaglia): I’m a consumer technology journalist specializing in digital imaging.
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