Sorry to bring you this bad news but your phones SoC and camera optics are not good enough to use the featured of the Lumia 5 camera.
Please Bing or google to find out why.
Lumia Camera might be included as the default camera app in Windows 10 (it is now in the TP) so expect faster camera startup and manual video focus while recording to come to all Lumia phones with Windows 10, Rich Capture might not.