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Viofio A139 Pro dash cam review: Three cameras, quality captures, slick design

Wednesday March 22, 2023. 03:30 PM , from PC World
At a glanceExpert's Rating
ProsDiscrete front, interior, and rear camerasType-C power and thin cabling4K capturesExcellent video quality from all three camerasConsQuite a few wires to accommodateConnecting app to phone required several rebootsOur VerdictOn Amazon (not the vendor site), the sub-$300 Viofo A139 Pro 3CH (front, interior, rear) dash cam is a bargain. The system uses three separate, freely-placeable cameras. Captures are excellent during the day, very good at night, and we appreciate the slick design and thin cabling.


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Most of the three-channel dash cams we review consolidate the front and interior lenses into one body. This cuts down on cabling, but can mean compromising on where you place it—e.g., hiding it behind the rear view mirror may cut off your interior coverage.

Not so with the Viofo A139 Pro 3CH whose interior camera is a separate unit. There’s also a discrete rear view camera for the ultimate in versatile coverage. The cherry on top is the very good (night) to excellent (day) capture quality of all three cameras.

One caveat. While the A139 Pro 3CH was available for $290 on Amazon at the time of this posting, it was $370 on the vendor’s own website (discounted from an MSRP of $400). Guess which price we like better?

Note: See our roundup of the best dash cams to learn about competing products, what to look for in a dash cam, and buying recommendations.

Viofo A139 Pro: Design and features

As mentioned, the three-channel A139 Pro system consists of a main body with the controls and a 2160p/140-degree field-of-view front camera, plus separate 1080p/170FoV interior and rear view cameras. The interior and rear cameras are identical in size and shape (nicely rounded and attractive), with the interior camera sporting infrared lighting.

Generally speaking, I’m not a huge fan of display-less dash cams such as the A139 Pro, though the design makes up for that absence somewhat with plainly labeled buttons and status lights on the camera’s rear deck.

All three Viofo A139 Pro 3CH cameras. The interior camera has the red dots (which are actually gray in real life).

The reason I prefer a display is that I don’t want to be reaching for my phone (interrupting anything else I’m doing with it) whenever I want to check a video, or to change a setting. Granted, those are relatively rare instances; but there’s also the fact that I’m just not as phone-centric as many other modern citizens. Use your own bias in judging this aspect of the dash cam.

On the other hand, I must commend Viofo on the connection and wiring solutions. The power connection is Type-C, which is something I’d like to see the world finally consolidate around in order to cut down on cable waste. Viofo also opts for much thinner cabling to the interior and exterior cameras than most systems.

Thin cabling is easier to hide and less obtrusive in places where it can’t be hidden. The cables are a bit stiffer than normal, but that didn’t hinder my installation. The connectors are also smaller than normal and click into place. Sweet.

The Viofo A139 Pro’s captures are great, its cabling is first-rate, and the three cameras are a fantastic way for ride-givers to achieve near 360 degree coverage.

Pictured: Live View, Video Setting, and Locked Files. The Viofo app works fine once connected, though you might have to reboot the app and phone a couple of times.

Software features include a parking mode, time-lapse recording, and low bit-rate captures to save storage. The A139 Pro accepts up to 256GB SD cards and is warrantied for 18 months after registration.

GPS is integrated into the camera, as you’ll see in the captures below. But you’ll also note that the time is off. I wrongly assumed that Viofo, an old hand in the business, would automatically set it using the GPS info, but only the date was set. Go figure.

Viofo A139 Pro: Performance

Getting a display-less dash cam to connect with its app—the only means of changing many settings—is part of its performance. Hence, I must mention that it was like pulling teeth to get the A139 Pro 3CH to connect first to Wi-Fi, and then the app. The process required power cycling the camera several times.

When it finally connected to the app, it chirped about switching to 5G and multiple power cycles were again required, as well as quitting and re-launching the app. It was all good in the end, but Viofo should work on this initial process. Note that this was on Android, not iOS.

I’ve already praised the A139 Pro 3CH’s video quality, but in finer terms: Daytime detail is sharp in both light and dark areas; color is nicely saturated and accurate; and motion is handled very well. There’s no frame tearing, and none of the shot-through-quivering-gelatin effect that I recently experienced with the Garmin DriveCam 76.

If the day capture below seems a little dark in temperature, it’s because I used the polarizing filter that was included with the A139 Pro 3CH Viofo sent me. Relative hue is still accurate and details are easy to distinguish.

Note: Right-click on any of the images and select “Open image in new tab” to see them at full resolution.

Yes, I was parked but detail and color are every bit as true with the car in motion. This is a superior capture in terms of color and detail.

Daytime interior captures were among the best I’ve seen. Yes, that’s the cable to the rear camera that I had not yet run along the convertible top. That’s also my backpack and one of my dogs in the foreground.

The A139 Pro’s interior captures are grayscale but supremely detailed, which is far more important.

The 1080p rear captures during the day are equally compelling—better than some front video I’ve seen.

Even the A139 Pro’s rear captures are superior. We’ve seen worse video from front cameras.

Come nighttime, and the A139 Pro’s performance dropped off a bit. Part of that may be because I forgot to remove the polarizing filter. Perhaps I was bowing to the inevitability that most people will also forget to do so on a regular basis. Just saying….

You can still make out detail in the front, which is the most important aspect, but surroundings suffer a bit in that regard. On the other hand, the A139 Pro handled headlight flare extremely well. There is none of the blowout you’ll see from cheaper cameras. Impressive.

The A139 Pro wasn’t as facile at night but a bit of the cloudiness is from the San Francisco weather.

There was also a major drop-off in detail with night interior captures. Nothing fatal, but compared with the daytime interior capture above, the difference in acuity is obvious.

Night interior shots provide decent detail and are well-lit, though not nearly as sharp as those taken during the day.

On the other hand, the rear camera seems to do just as well at night as during the day. Forgive the massive moisture drops. They’re from the copious rain we’ve been having here in San Francisco and I didn’t notice them at the time. Look in between the drops, however, and you’ll see impressive detail.

It was a bit wet in San Francisco this night, but the rear detail is still very good.

In total, the A139 Pro is an excellent daytime camera, and if you forgive some details in the surroundings, an excellent nighttime recording apparatus. The stellar way it handles headlight flare could be paramount in the case of a head-on collision. Nice job, Viofo.

Note that the A139 Pro 3CH uses a super capacitor for one or two seconds runtime should the power source fail. That’s enough time to save the last video, but not to capture events post power loss. Power loss is rare in accidents, but not unheard of.

Should you buy the Viofo A139 Pro?

Purchased from Viofo’s website, the A139 Pro 3CH is pricey and a more hesitant recommendation. On Amazon for more than $100 less, however, I have no hesitation whatsoever. The captures are great, cabling is first-rate, and the three cameras are a fantastic way for ride-givers to achieve near 360 degree coverage. A short-lister, to be sure.

Dash Cams
https://www.pcworld.com/article/1518169/viofio-a139-pro-dash-cam-review.html
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