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Panasonic’s Lumix DMC-GX series of rangefinder-style Micro Four Thirds bodies is now in only its second generation, despite the model numbers jumping to GX7 from GX1. But given all the good stuff in the new GX7—a 16MP Live MOS sensor, tilting 3-inch LCD touchscreen, tilt-up 2.76-million-dot electronic viewfinder, and highly customizable set of controls—it makes sense that the line would skip a few grades. This upgrade also signifies the change in the perception of interchangeable-lens compact cameras. While many at first thought that ILCs would appeal mainly to inexperienced photographers, it soon became clear that even very advanced photographers wanted the option of shooting with small, lightweight system cameras. And the GX7 should make those high-level shooters sit up and take notice, considering the results from the Popular Photography Test Lab.
The Lumix GX7 fared well for a 16MP camera, earning an Extremely High rating in overall image quality from its lowest sensitivity of ISO 125 through ISO 400.
Resolution was the main limitation, keeping the camera just shy of an Excellent rating. With RAW images converted to uncompressed 16-bit TIFFs using the customized version of Silkypix included with the cameras, the GX7 turned in 2480 lines per picture height at ISO 125, with default noise reduction applied. Panasonic doesn’t vary the amount of noise reduction applied as the ISO changes, so noise degradation and any other side effects of signal amplification gets most of the blame for lost resolving power as the ISO increases.
Not much resolution is lost until after ISO 6400, where the GX7 captured 2325 lines with battery such as panasonic CGR-B202A Battery , panasonic CGA-S303 Battery , panasonic VW-VBE10 Battery , panasonic SDR-S300 Battery , panasonic VW-VBF2E Battery , panasonic VW-VBF2T Battery , panasonic M3000 Battery , panasonic M9000 Battery , panasonic VW-VBS2E Battery , panasonic HHR-V40 battery , panasonic PV-BP17 battery , panasonic VW-VBR1E battery . By the camera’s top sensitivity of ISO 25,600, resolution had fallen to 2160 lines.
As usual, the noise numbers for the Lumix GX7 reflect Panasonic’s lackadaisical approach to RAW. At ISO 125 the camera earns an Extremely Low rating, and it drops to a Low rating at ISO 800. From there, noise rises faster, reaching an Unacceptable rating at ISO 1600. And at ISO 25,600, it was literally off the charts we use to deliver our test results.
As much as Panasonic seems to ignore RAW, it has been working hard on JPEG conversions lately. JPEGs straight from the GX7 show significantly less noise than their default-processed RAW counterparts, but you’re forced to go to JPEG files’ lower bit depth (8-bit) and sacrifice a noticeable amount of resolution to the noise reduction and JPEG compression.
In our color accuracy test, the GX7 got an Excellent rating with an average Delta E of 6.3. And in our field testing, the images captured by the GX7 did a great job of reproducing colors, including some (such as very deep purples) that would have flummoxed DSLRs as little as five years ago.
Specifications:
IMAGING: 16.0MP effective, Four Thirds-sized Live MOS sensor captures images at 4592x3448 pixels with 12 bits/color in RAW mode
STORAGE: SD, SDHC, SDXC slot stores JPEG, RW2 RAW, RAW + JPEG files
BURST RATE: Full-sized JPEGs (Fine mode), up to card capacity at 4.3 fps; RAW (12-bit), up to 9 shots at 4.3 fps
AF SYSTEM: TTL contrast detection with 23 selectable focus areas; single-shot and continuous AF with face detection and subject tracking
SHUTTER SPEEDS: 1/8000 to 60 sec, plus B (1/3-EV increments); shutter life not rated
METERING: 1,728-zone TTL metering, Multi-pattern (evaluative), centerweighted, spot (size of spot not specified); EV 0–18 (ISO 100)
ISO RANGE: Standard: ISO 200–25,600 (in 1/3-EV increments); Expanded: ISO 125–25,600
EVF: Tilting LCD with 2,764,800-dot resolution, 1.39x magnification
VIDEO: Records at up to 1920x1080p60 in AVCHD Progressive format; built-in stereo microphone; no mic input. Maximum clip length not restricted in the U.S. when using AVCHD.
FLASH: Built-in pop-up; GN 17 (feet, ISO 100); flash sync to 1/320 sec (built-in) or 1/250 sec (external flash). Wireless flash control with Panasonic external flashes.
MONITOR: Tilting 3-inch LCD touchscreen with 1,040,000-dot resolution; 7-step adjustments for brightness, contrast, red tint, and blue tint
OUTPUT: USB 2.0, mini HDMI video, composite video
BATTERY: Rechargeable DMW-BLG10PP Li-ion, CIPA rating 350 shots
SIZE/WEIGHT: 4.8x2.8x2.2 inches, 0.9 lb with a card and battery
STREET PRICE: $999, body only; $1,099, with 14–42mm f/3.5–5.6 Mega OIS lens