Hi.
You do not need to worry about manual lens settings. RC must work with this images without problem.
Problem, that 24Mpx smartphone camera sensor have real resolution around 6Mpx Comparing to DSLR camera.
And RC just can’t connect features found on smartphone images with same features found on DSLR images.
As workaround you can use control points for merging components. And/Or shoot more images with smartphone with better overlap from more close range distance than DSLR (2m for DSLR ~ 0.5-1meter for smartphone camera like iPhone 6S)