Does Pentax K5 choose a large set or a small set? And Sony's 5R

For girls, it is more important to be light, and there are fewer opportunities to change lenses when traveling and living. 18- 135 It's best to use one lens. In addition to candid photography, full-focus imaging is passable. The effect is definitely better than two dogs, and it is definitely more convenient (carrying and changing lenses). K5 is lighter and smaller than the same level machine of C/N company, but don't expect it to be much lighter, because you use a SLR. Personal experience, unless you are a professional photographer, go out to take pictures alone. Generally, when you go out for a trip, a party, etc., your partner won't wait for you to change the lens.

18-35 is basically a landscape, 50- 135 can be used to take portraits, and the hand-held effect of the focal segment above 135 is not very good. Girls suggest using a tripod for focal lengths above 200.

That's all I can think of. I hope it helps.