Mini / nano and photography don't usually go together. What type of photography and equipment do you plan on using since the better, heavier equip will need a bigger frame.
For a larger photography platform, I really like the F450 frame with a pixhawk 4 and FrSky gear. Not a typical beginner set-up, but this is where you could end up if you want to build a nice quadcopter with gps for photography .