Panasonic GH3 Flash

Flash Test Results

Exposure and Range
A powerful flash for a built-in. Less than average positive exposure compensation required.

Normal Flash, ISO 200
1/60s, f/4, +0.3 EV
Slow-Sync Flash, ISO 200
1.6s, f/4, 0 EV

Coverage. Without a kit lens, we have no flash coverage results.

Exposure. Indoors under incandescent background lighting, the Panasonic GH3's flash produced a bright exposure of our indoor portrait scene at ISO 200 with +0.3 EV flash exposure compensation. The typical amount required for this shot is +0.7 EV, so the GH3's performance is above average here. The camera's slow-sync flash mode required no compensation for bright results, though the longer exposure resulted in a very warm cast from the ambient background lighting.

ISO 200 Range. Since flash range is lens dependent, we did not shot a wide and tele range series for the GH3.

Manufacturer-Specified Flash Range

14.0 feet
ISO 200

Manufacturer-Specified Flash Range Test. Panasonic rates the GH3's flash Guide Number at 12m at ISO 100, or 17m at ISO 200. That works out to about 14 feet at f/4 and ISO 200, as shot above. As you can see, the Panasonic GH3 captured a bright flash target (actually overexposed by about 1/3 EV), so the built-in flash performs to specification. Our standard test method for flash range uses either a fixed setting of ISO 200, to provide a fair basis of comparison between cameras. We've now also begun shooting two shots using the manufacturer-specified camera settings, at the range the company claims for the camera (at Auto ISO if so specified), to assess the validity of the specific claims.


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