Since the light emitted from a flash tube of a flash is bluish white, the color of the light is generally adjusted with a fresnel lens.
The MG series flashes also use a fresnel lens to adjust color, but when the zoom cover is removed, the flash does not have a fresnel lens, so the original color of the light emitted from the flash tube becomes apparent.
In this case, if the camera’s white balance is set to AUTO or sunlight, the image may appear pale, so please take a test shot beforehand and adjust the white balance manually.