I use the Flip case during the week for work because of the slimmer profile. No, I don't think it affects photo-taking when flipped open. I use the Dual Layer Shell on the weekends.
I've used a flipcase on a Samsung S5 for a couple of years and so I ordered one for my Keyone last night. Some days I like it some it seems like a PIA but overall I like the added protection it offers.