Boscam G20 video transmitter for Gopro Hero 3 and 4. What it is and why you need one.

The Boscam G20 is a 5.8GHz 32 channel composite video transmitter for the Gopro Hero 3 and 4 cameras. It uses the accessory port on the rear of the camera to send video to a compatible receiver and is the best thing since sliced bread.

Here’s why.

The Gopro Hero 4 is a pretty serious piece of kit for film makers. It’s sharp, light, relatively cheap and shoots 4k and 2.7k footage with usable frame rates and a flat colour profile. That’s a great start but using it to produce professional looking footage turns out to require much more in terms of hardware than you might think.

For capturing action sports the super wide view of the Gopro is perfect as a ‘fit and forget’ camera but when using the more cinematic narrow or medium fields of view, knowing what you’re shooting becomes more important. If you need live view when filming (and you do) you have a few options:

  • The Gopro App – Streams video to your phone or tablet via WIFI and offers full control over the settings. This is awesome for framing up your shots but rubbish for actual filming. The lag between moving the camera and the display updating is just too much to be useful. You’ll go insane trying to film anything seriously like this.
  • The LCD Bacpac (yes it’s spelled ‘Bacpac’) gives a lag free preview and adds touch control but is tiny and stays on the camera at all times. This means if you want to put your camera on a boom arm or stabilizer you won’t be able to see it. so it’s really no better than the app.
  • HDMI Out, this is the ‘pro’ choice offered by Gopro, assuming that anyone using their Hero4 for serious use will use a large rig and can trail cables to monitors with no problems. This is undoubtedly the best quality available but rather defeats the object of having a tiny mountable camera. Especially when the weight of an HDMI cable will prohibit the use of any handheld stabilizer.

The answer? The Boscam G20 transmitter. A self contained box the same size as a battery or LCD Bacpac that sends live video straight to a wireless receiver. No wires, no uneven weight distribution and perfectly designed for anyone using a handheld stabilizer such as the Feiyu G4 or G4s.

The Thing itself.

The Boscam G20 is a cheap, lightweight transmitter that plugs directly into the Gopro Hero3 and Hero4 cameras using the rear connector. With a 500mAh internal battery it charges via a micro usb socket and is supposed to last for 2 hours per charge. (I’ve not tested this fully yet but I’ll get back to you.) At 28g it’s extremely light and mounts perfectly into any Gopro mount or case designed for use with the Bacpac accessories. Importantly, it does work perfectly with the Feiyu G4 series stabilizers which is the whole reason I bought it. The specified range is 300m  though for film making use that will be more than enough.

To see the video you’ll need a 5.8Ghz 32 channel receiver. I use a Black Pearl diversity monitor that does not require a separate receiver and it works beautifully.

To set up your G20 you’ll need to power it up before fitting it to your Gopro, then select a channel using the mode button on the side of the unit. A long press cycles through the bands A, B, E, F and a short press cycles between channels 1-8.

Before buying the G20 I could find no information, no reviews, nothing. If you’re looking for a wireless live view solution then this is it.

I recommend buying your Boscam G20 from Banggood.com here 

If you’re still not convinced here’s a quick  video to show you it working.

As always, if you have and questions just leave a comment.

2 thoughts on “Boscam G20 video transmitter for Gopro Hero 3 and 4. What it is and why you need one.”

    1. Hi Sam, The Boscam G20 can be found on auction or import sites for about £35-40. Or at banggood.com here http://www.banggood.com/Boscam-Bos-G20-5_8G-32CH-VTX-FPV-Transmitter-for-Gopro-3-3-4-p-977499.html?p=RZ252241295342016037 The range is quoted as 300m. I suspect it will be far less than that but I intend to use it for ground work, mostly in the same room. In the video you can see the diversity monitor prefers a whip antenna to the CPL at close range. I’ll see if I can test it further for you soon.

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