From post
How do I get a picture on my PC or Mac to my iPhone?
I assumed that he ask what if he got picture on Mac or PC then want to transfer to iPhone
such photo to DSLR Camera
Yes, can sync photo album to iPhone using iTunes
Do like that whole album will synced to iPhone but inconvenient if use want to delete that photo (they need to resync with iTunes again)
Alternative way that I recommend is transfer file by AirDrop on Mac or use mention app above
Advantage is no sync iTunes require, can transfer single or multiple picture to Photos iOS, after that can delete it what if don't want to use anymore