Personally I find that the micro four thirds mirrorless camera system as manufactured by Panasonic, and Olympus is ideal for size, weight, price, and image quality. I can put all of my camera equipment into one small rucksack and walk around all day without any strain. All of the Panasonic, and Olympus lenses are interchangeable, making for a very comprehensive selection of lenses.
So what's in my bag?
Camera: Olympus OMD E-M10 II, a lightweight camera, but with lots of menu options, and function buttons to help obtain the best images.
Olympus 75-300mm f/4.8-f/6.7, my big zoom, cheaper, and lighter than the Panasonic version, but not as bright, so it may struggle in poor light, the image quality seems to be comparable though. Sample image: puffin at Bempton Cliffs.
Meike MK320 Speedlight, nice little flash, it only needs 2 AAA rechargeable batteries, which are chargeable in situ using a micro usb lead, does TTL, and Slave, unfortunately not wireless though.
Olympus 17mm f/1.8, my everyday "walk about" lens, the ideal focal length for most of my photography. Sample image: Goit Stock waterfall.
Olympus 45mm f/1.8, my portrait lens, amazing value, and great image quality.
Olympus 60mm f/2.8 macro, very lightweight, great focal length, good image quality, this lens can also be used as a portrait lens, and a telephoto prime for wildlife photos.
Manfrotto Pixi tripod, lightweight, inexpensive, and small enough to slip into a jacket pocket, or a corner of a camera bag.
Olympus 14-42mm f/3.5-f/5.6 kit lens, very capable little zoom lens.