When comparing Panasonic Lumix G7 vs Fujifilm X-T1, the Slant community recommends Fujifilm X-T1 for most people. In the question“What are the best mirrorless cameras?” Fujifilm X-T1 is ranked 5th while Panasonic Lumix G7 is ranked 10th. The most important reason people chose Fujifilm X-T1 is:
Good colors, lots of detail and little noise up to 6400 ISO (though Fujifilm's 6400 ISO is closer to 4000 ISO in other cameras). The camera adjusts the white balance pretty accurately in all kinds of conditions.
Specs
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Pros
Pro MFT lens mount allows for a wide variety of lenses to choose from
Micro Four Thirds system is a standard used by Panasonic, Olympus, Sigma and many others so you're not locked into a having to buy lenses from one manufacturer.
Pro Shoots good quality 4K@30 video
The G7 takes footage from a crop of the sensor and includes focus peaking and zebra striping tools allowing you to get good quality video.
Pro Great image quality
Good colors, lots of detail and little noise up to 6400 ISO (though Fujifilm's 6400 ISO is closer to 4000 ISO in other cameras). The camera adjusts the white balance pretty accurately in all kinds of conditions.
Pro Great viewfinder
It has a huge viewfinder with a 0.77x equivalent magnification. The size of the viewfinder allows for additional functionality such as displaying an enlarged image next to the overall image and turning the image to portrait view when the camera is turned sideways.
Pro Good auto white balance
Pro Good in-camera RAW conversion
Pro Quiet shutter
Cons
Con Can't zoom in on video in playback mode
There's no way to zoom in on the screen in playback mode to check details of the footage.
Con Limited control over video
The camera will automatically adjust exposure. ISO and shutter speed is ignored. And so is exposure compensation past +/-2 EV. There's also no way to adjust aperture during recording, it has to be set before you start shooting.
Con Autofocus varies highly depending on lens used
X-T1 works amazingly well with internal focus lenses while being really slow with older X-system lenses.