Windows Central talk to Juha Alakarhu aka The Imaging Guru

If you have about half an hour, you can see a conversation with Juha Alakarhu, Head of Imaging Technology at Microsoft. Some of the talking points are: What's new in Lumia Denim and Lumia Camera 5.0, and why this is the biggest change for Lumia Camera since Windows Phone 8.0? Why are the new Lumia Camera 5.0 features only available for the Lumia 1520, Lumia 930 (Icon), and Lumia 830 (sans 4K video)? Will there be an imaging-flagship follow-up to the Lumia 1020? What goes into determining camera features e.g. F-stop? Not everything will be answered, but it's nice to watch anyway.