Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Is this the best cable to connect a zoom H6 to DSLR for video?
Document: This easily connects from my Canon DSLR to my Zoom H4N and allows me to record audio straight to my DSLR video files. I no longer have to sync audio while editing and I am also able to still record audio to the H4N allowing me to get two copies of the audio just in case.
The most painful part of DSLR filming is the anxiety in wondering just what sound you've recorded while on set or on location. With this little cable, you can banish that worry -- provided you have an external sound recorder.Combined with a Zoom H4n for example, you can now record high quality sound directly through your camera.
Now this won't be used all the time, but it will be used for instances when I connect my Tascam Dr40 to my camera, as the regular straight input will be too much input.This brings down, as if I had a separate mic/line input switch on my Canon DSLR
This cable is one of the only ways to monitor audio prior to sending it into your DSLR.Can't live without it, for now anyway!
Although I only use the camera sound for reference, it's important to get a very clear sound into your camera without distortion, and the best way to do so is by monitoring your audio. My Canon T4i doesn't have a way to record and monitor at the same time with an external mic source, but this cable makes it all possible.
I just used it to connect my zoom h4n to my dslr and it worked great. Unlike other wires this one tone downs the sound so it minimizes the audio adjustments on the camera. I put my EOS 4ti on the normal audio input settings and it worked fine. I looked at youtube before I ordered this and unlike some of the cables, this one lowers the sound going in the camera.
Being an amateur, I was concerned that the voltage on the "line out " of the Zoom H4N would not quite deliver the audio to my Canon Vixia, ( mic in port, 3.5mm input) . But OMG, it worked, and the audio in the video track was essentially the same as the audio captured directly to the memory card of the Zoom H4N.
I have a Zoom 4h, this cable help me to get a really good product so I'm pretty glad for this.
This product works like this. You want to record using your Zoom Recorder as a "shotgun" mic by mounting it on your camera. This cord allows you to monitor audio while recording in real time. Philip Bloom said himself that recording audio without monitoring is like recording video and not looking at the screen. this product does the job. used on a canon 60d
This mic line is great for monitoring audio levels on an external microphone on a DSLR without a separate headphone jack. My only criticism is that is feels a bit flimsy.
Answer: I used in a H4 and work perfect so I think you can use on a H6