When comparing Panasonic Lumix G7 vs Olympus OM-D E-M1, the Slant community recommends Olympus OM-D E-M1 for most people. In the question“What are the best mirrorless cameras?” Olympus OM-D E-M1 is ranked 1st while Panasonic Lumix G7 is ranked 10th.
Specs
Ranked in these QuestionsQuestion Ranking
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 Amazing image stabilization
Pro Supports standard Four Thirds lenses
Built-in phase detection allows you to use standard Four Thirds lenses via an adaptor.
Pro Good electric viewfinder
The viewfinder is bright and sharp.
Pro Great focusing system
The focusing system is quick, it rarely if ever resorts to focus hunting and it's consistently accurate.
Pro In-body stabilization saves money on lenses
Since stabilization can be applied to any lense, you can save money by not having to spend it on stabilized lenses which are generally more expensive than non-stabilized lenses.
Pro Convenient in-camera RAW conversion
Pro Quick access to settings
The camera takes a "buttons and dials for everything" approach. It's also possible to change what some of the buttons do.
Pro Great image quality
E-M1 takes sharp 16MP images with tonal colors. There's little noise up until 1250 ISO and there's little smudging up until 6400 ISO.
Pro Continuous autofocus works well at a distance
Continuous autofocus is reasonably reliable using long lenses at a distance. It works slightly better with the subject coming closer/moving away from the camera than it does when the subject is moving from side to side.
Pro Can preview HDR images in viewfinder
HDR images can be composited in-camera and the output seen using the viewfinder.
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.
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 Video quality could be better
The video is limited to 24MBit max bitrate.
Con Limited framerate options
Shooting in 1080p the camera is limited to 30fps, there are no slow-mo options or 24fps options.
Con Continuous autofocus is spotty at close range
Continuous autofocus is sometimes seen hunting with wide angle lenses at short range.