Accsoon CineView Master 4K – review with the Blackmagic PYXIS

Wireless image transmission is more attainable than ever, but low latency has for years been the preserve of the most expensive systems due to various patents. 

Can the Cineview Master 4k from Accsoon break the trend and offer fast transmission for under $850? 

For the past month I’ve been trying out the Cineview Master 4K on various different shoots paired up with the Blackmagic PYXIS. 

And for anyone wanting a quick summary, it does everything it says, and yes, you should buy it. There are a few caveats that we’ll get to later, but genuinely this is the first affordable wireless transmission system I’ve used that could be used in speed critical situations. 

Accsoon CineView Master 4K overview

But let’s rewind: what is it, and what does it offer? 

In the package I’ve been using you receive a transmitter and reciever unit, with a selection of usbc and lighting cables, along with a couple of hot shoe adapters. The system can be powered directly with Sony NPF-style batteries or via the DC input. Accsoon also has a v mount adapter cradle coming out to allow you to mount the transmitter onto your camera’s V-Mount plate and place a battery on the back of the cradle, I saw this in person at IBC 2024 and it looks like a neat solution if you plan to use a camera with a V-Mount Plate. 

On the Transmitter, you have both an SDI and HDMI input, along with USBC and HDMI outputs.

The receiver has outputs via SDI or HDMI. 

The maximum resolution is 4K at 60 frames per second.

The real draw of this unit though is the claimed sub 25 millisecond delay. It should be noted that this is only attainable in the 1080 mode, with the 4k mode dropping to sub 35ms. But to be honest that is still really really good! 

Alongside the speed, Accsoon has also implemented a triband transmission system which broadcasts on 2.4ghz, 5ghz, and 6GHz 

In use this should mean that your signal will be solid and reliable as it has more bandwidth to work with and can intelligently switch to find the best channels. 

Next, the range is claimed to be 2.5km. In the past, when I’ve used systems with low latency and long range, such as Teradek Bolt, I found that they did live up to the very low latency, but the range was more of a notion based on perfect conditions and a clear line of sight. 

On several shoots, the signal was lost due to the topography of the location or because the transmitter and receiver were in different vehicles and were blocked by parts of the car. 

So! I’m curious to see how well this range holds up on the Cineview Master

The final feature Accsoon has included is a triple hit. Alongside transmitting to the receiver unit, you can also broadcast to iOS deceives with their SEE app, AND the transmitter offers a hardwired USB-C to lighting or USB connection for an iPhone or iPad as an on-camera monitor with a higher bit rate stream compared to the wireless! Somewhat similar to the SeeMo Pro they offer, this, as a consequence, also means you can now send your footage straight to frame IO from the SEE App! Oh and it keeps your device charged too.

I think it’s fair to say there is a lot on offer, but how is it in real world use? 

Shoot Testing

The first project I got to try this out on was a week-long food shoot in Italy. 

For this shoot I was imaging that I would send a feed to the client and art director on my iPad, in the event that didn’t happen much as most of the time we were working outside and they had lots to prep to get food to the locations. 

What I did end up doing was building the camera rig so that I had the Cineview Master on the back of the build and then using a combination of my iPhone or the EVF, depending on the shot I was getting and how bright the sunlight was. At first, I was hardwiring my iPhone, which was great, but I realized that having it connect wirelessly meant when anyone did want to watch or review a shot, I could just pass it to them. So I started just connecting via the WiFi option, this worked astonishingly well. to the point where I was actually pulling focus on it… and it got me thinking about what the delay on the iOS Transmission is… Spoiler for my tests later its 1- 2 frames at most. 

This was phenomenal as it meant I could use the unit viably with iOS devices and focus pull/frame from them. There were a couple of occasions shooting indoors where I did set up the iPad, and that was seamless even while using my phone at the same time. 

Accsoon allows a total of 4 wireless connections, and that is from any of the options you have—iOS and the actual receiver. On this shoot, I actually didn’t take the receiver unit as I didn’t have space for a monitor and figured I would only be using the WiFi iOS connections. 

Next up I took it out on a couple of smaller shoots filming a Halloween special for Berwick House and a promo for DOUK snowboards. In both of these scenarios it performed really well, and for these I was powering with NPF batteries directly on the unit, I have the smallest variety and they lasted very well so it isn’t too power hungry either. 

Something I did find myself doing was removing the side antennas, which you may have noticed in some of the behind-the-scenes shots. This was to make things more comfortable when shooting, I did check with Accsoon and they said it is fine to do this, the only downside would be reduced range. Which wasn’t a concern for me on those shoots. In the future, I may look at alternate antennas, perhaps the more low-profile mushroom variety, just to keep things more streamlined on camera builds where I’ll be operating.

Accsoon CineView Master 4K latency range test

The claimed 2.5k Range is legitimate, though I haven’t had a shoot that demanded it yet. 

However, with line of sight, it is perhaps even a bit conservative! As with any antenna, it would also be possible to use more directional aftermarket models if you know that you need to achieve a wireless connection over a long range in a specific direction. In a built up area it obviously dropped off but was still very respectable, it’s hard to be absolutely scientific in this testing as there can be varying amounts of wireless traffic, and different materials used in buildings etc. But anecdotally, it performs as well, if not better, than previous systems I’ve used at more than 5 times the price. 

Accsoon CineView Master 4K latency latency test

Again, it’s not a perfect test as everything is in very close proximity here. 

But in principle, you can see that the iOS transmission is 1-2 frames behind the built-in Monitor on the PYXIS. The HDMI screen connected via the receiver seems to be a tiny bit further behind, maybe 2-3 frames. Though I would like to re-run this test with an SDI monitor, which I don’t currently have, as HDMI itself is, in theory, not as fast, so that could introduce a tiny bit of delay. 

Overall I think that Accsoons claimed specs are real and that is great news! 

CONCLUSION

In my real-world use of the CineView Master 4k, I’ve been really happy with how it worked and integrated into the different rigs I was using. 

Something I didn’t mention before was heat, it doesn’t get scolding hot to the touch and was never uncomfortable in the context of a handheld / Easyrig camera setup. Other systems I’ve used in the past have been downright unpleasant in this context getting very hot! 

So would I recommend it? Yes, absolutely, and I’m going to keep using it on my rig! 

But I guess the question is, who wouldn’t buy it and why? The market at the moment is in a constant state of flux with new equipment coming out at an almost exponential rate. As it stands currently, the Accsoon is unique in the market, but DJI looms as an alternative. Personally it is an ecosystem I’m not in and currently doesn’t appeal for the way I work. But no doubt, for some, that may be a consideration. What Accsoon offers here is something that a couple of years ago you would have paid $6,000 or more for, and it has more features and ergonomic improvements on top of being sub $850. 

And if you’re looking at this and thinking thats great but I don’t need the reciever part…. Well you can just buy the transmitter and bring the price down even more! 

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