https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-Connect-App/m-p/204397#M36342 <P>Hello Booncroft,&nbsp;<BR /><BR />You may wish to try a lower resolution video on the EOS 5D Mark IV to see if this makes a difference. &nbsp;If you needed an additional monitor or viewfinder that's always an option that you can add on later to the system. &nbsp;</P> Fri, 24 Mar 2017 20:29:11 GMT Tim 2017-03-24T20:29:11Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-Connect-App/m-p/201886#M36341 I've connected my iPhone to my canon 5d mark 4 and using in video mode. Essentially using my phone as a viewfinder.<BR /><BR />There is some considerable lag time. Am I better off buying a professeion viewfinder / monitor instead? Wondering if it's the wifi not able to handle the transmission. Maybe there is a way to down-res the picture to the app so it can handle the load? Sun, 26 Feb 2017 20:10:19 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-Connect-App/m-p/201886#M36341 Booncroft 2017-02-26T20:10:19Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-Connect-App/m-p/204397#M36342 <P>Hello Booncroft,&nbsp;<BR /><BR />You may wish to try a lower resolution video on the EOS 5D Mark IV to see if this makes a difference. &nbsp;If you needed an additional monitor or viewfinder that's always an option that you can add on later to the system. &nbsp;</P> Fri, 24 Mar 2017 20:29:11 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-Connect-App/m-p/204397#M36342 Tim 2017-03-24T20:29:11Z