Panasonic Lumix G100 vs Panasonic Lumix DC-GX9 — Which Is Better?

The Panasonic Lumix G100 and the Panasonic Lumix DC-GX9 are both mirrorless cameras in the Micro Four Thirds format, so any Micro 4/3 lens you own fits either body. The G100 arrived in 2020, two years after the GX9, and is the lighter body at 352 g against 450 g.

Their shapes differ rather than one being smaller. The G100 measures 116 x 83 x 54 mm, while the GX9 runs 124 x 72 x 47 mm, longer but slimmer front to back. Each profile suits a different bag or grip.

Both deliver the same 20 MP resolution on a Micro Four Thirds sensor, so crops and prints start from an identical pixel count. Both include in-body stabilisation for sharper handheld shots at slower shutter speeds, and each places 49 autofocus points across the frame.

The G100 is the stronger choice for eye-level composing, with a 3,680,000-dot viewfinder against 2,760,000 on the GX9, 25 percent more dots for checking fine detail before you shoot. For brief action bursts it also reaches 10 fps against 9 fps, one extra frame per second at their top speeds.

The G100 is the clear choice for slow motion, doubling the GX9's top frame rate with a 120 fps maximum against 60 fps, so fast motion like a bird taking off slows far more smoothly. Both record 4K video, so full-resolution output is shared.

Both offer built-in timelapse for condensing a sunset or drifting clouds without extra gear. The GX9 records AVCHD alongside MPEG-4 and MOV, while the G100 records MPEG-4 and MOV, a difference that matters only if your editing workflow still uses AVCHD.

The G100 gives you a sharper rear screen, with 1,840,000 dots against 1,240,000 on the GX9, so reviewing focus right after a shot is crisper. Both screens are 3-inch touch panels that tilt for waist-level and high-angle framing.

Both offer Wi-Fi and Bluetooth for transferring images and remote control from a phone, plus a built-in flash for dim interiors. Neither has GPS for location tagging, and neither is weather sealed, so both need care in rain or dust.

The G100 holds a small edge for a long outing, rated at 270 shots against 260 for the GX9. Both charge over USB, so you can top up from a power bank between locations.

Their card setup matches, with one SD, SDHC or SDXC slot at UHS-I speed in each body. Neither offers a second slot for overflow or backup during a shoot. The G100 uses the BLG10 battery pack, while the GX9 takes a lithium-ion pack.