As a retired pro---tired of years of hauling around gear---my goal was to put together a the most compact system possible for travel (with good image quality). I purchased:
All Lumix lenses because of the in-lens stabilization. That translates into sharper photos under low light, and the ability to live with only the built-in flash. A suitable external flash would have broken my "compactness" budget.
Specifically, I purchased
A 20mm 1.7 lens, because
> A midrange "prime lens" such as the 20mm 1.7 is a "must have" for any serious photographer
> The 20mm 1.7 is sharper than ANY zoom, and has a larger maximum aperture
> It was practically free with the Lumix GX7 body
> I didn't want the bulky 14-42 kit zoom. If you want the 14-42 kit zoom (which is a good buy), buying the camera as a kit with the 20mm f1.7 and the 14-42 kit zoom separately adds up to the lowest total cost.
I also purchased:
A Panasonic Lumix G X Vario PZ 14-42mm/F3.5-5.6 Lens Panasonic Lumix G X Vario PZ 14-42mm/F3.5-5.6 Lens for Panasonic Lumix G-Series Digital Cameras (Black)
> It is much more compact than the 14-42 kit zoom, and highly rated for image quality.
> I strongly considered the 14mm F2.5 lens instead, which may have been a better choice for me. Panasonic Lumix 14mm f/2.5 G Aspherical Lens for Micro Four Thirds Interchangeable Lens Cameras
> If you do much wide-angle work, a Lumix 12-32mm may be a better choice. Panasonic Micro Four Thirds interchangeable lens LUMIX G VARIO 12-32mm / F3.5-5.6 ASPH. / MEGA OIS H-FS12032 Silver
A Panasonic Lumix G 45-150mm lens. Panasonic H-FS45150K Lumix G Series Lens (Black)
> The combination of the pancake 14-42mm and the 45-150mm covers the whole range from wide angle to long telephoto.
> The combination of the pancake 14-42mm and the 45-150mm yield about the best image quality (for zoom lenses) covering this range.
> The 45-150mm is considerably more compact than the 45-175mm or the 45-200mm.
> The 45-150mm is particularly good at the top end of its range; the 45-175mm and the 45-200mm not so much. So if I need an longer reach, magnifying and cropping an image taken with the 45-150mm at 150mm will probably be as good as the 45-175mm or the 45-200mm at their maximum ranges.
A CAMERA CASE
Together, all three lens fit in a VERY compact Lowepro Edit 110 case, with any of the three lenses on the camera, and any of the two remaining lenses stacked in the adjacent compartment. It is a great kit for travel. Lowepro Edit 110 Camcorder and Camera Bag
> Note that the kit 14-42mm (instead of the pancake 14-42mm) would not fit in the Edit 110 bag. The 45-175mm nor the 45-200mm (instead of the 45-200mm) would not fit. However, the Edit 120 and 130 models are larger.
I purchased a tiny Norazza monopod which is a gem! Norazza Monopod-lightweight TD140
Monopods are not very effective at less than moderate telephoto---but at long telephoto, even with image stabilization, they often make the difference between a poor image and a good one. I've shot sharp photos of a red fox in Yellowstone at an effective 300mm with a Nikon S8200 and this monopod.
THE CAMERA STRAP
I recommend NOT installing the included camera strap. I very badly scratched the screen on my Nikon S8200 by wearing it around my neck for a half-hour (rubbing against my "pearl" shirt buttons). Instead I installed a Nikon 25770 AN-CP19 Black Strap
wrist strap on my Lumix. I keep the camera in the Lowepro bag when it is not in use. Note that although you can buy protective plastic covers for the screen, these are likely to interfere with the touch functions which are essential in using this camera.
> A 46mm metal screw-in lenshood will fit the 20mm f1.7 Fotasy MH46 Metal Screw-In Lens Hood for Panasonic Lumix 14mm f2.5/20mm f/1.7 Lens and Leica DG SUMMILUX 25mm F1.4 ASPH Lens
> With a A&R Step-Up Adapter Ring 37 mm Lens to 46mm Filter Size
, the same hood may be used on the 14-42mm pancake lens, and in neither case does the hood vignette the image. I recommended installing the 37-46mm step-up ring permanently on the 14-42 lens, and purchasing a 42mm lenscap Everydaysource Camera Lens Cap , 46mm Black
to protect the lens when it is not in use.
> The 46mm lenshood has threads for 55mm filters, and so you can use a 55mm lenscap protect either lens when the hood is installed. Unfortunately, when the lenshood is installed on either lens, it is a little tight in the Lowepro Edit 110 case, but the lenshood stows easily in either of the side pockets.