Here's an example. I am fairly certain that the image on the left was taken with me at the camera holding the back button in. The image on the right was triggered remotely. Focus/meter point would be on the bird's head. Shots are about an hour apart (but only 34 images) with effectively the same lighting.
EXIF from the dark image:
<exif:ExifVersion>0231</exif:ExifVersion>
<exif
ixelXDimension>5568</exif
ixelXDimension>
<exif
ixelYDimension>3712</exif
ixelYDimension>
<exif
ateTimeOriginal>2020-06-10T15:21:49</exif
ateTimeOriginal>
<exif:ExposureTime>1/500</exif:ExposureTime>
<exif:FNumber>8/1</exif:FNumber>
<exif:ExposureProgram>1</exif:ExposureProgram>
<exif:ISOSpeedRatings>
<rdf:Seq>
<rdf:li>640</rdf:li>
</rdf:Seq>
</exif:ISOSpeedRatings>
<exif:ShutterSpeedValue>8965784/1000000</exif:ShutterSpeedValue>
<exif:ApertureValue>6000000/1000000</exif:ApertureValue>
<exif:ExposureBiasValue>4/6</exif:ExposureBiasValue>
<exif:MaxApertureValue>53/10</exif:MaxApertureValue>
<exif:MeteringMode>3</exif:MeteringMode>
<exif:LightSource>9</exif:LightSource>
<exif:Flash rdf
arseType="Resource">
<exif:Fired>False</exif:Fired>
<exif:Return>0</exif:Return>
<exif:Mode>0</exif:Mode>
<exif:Function>False</exif:Function>
<exif:RedEyeMode>False</exif:RedEyeMode>
</exif:Flash>
<exif:FocalLength>4900/10</exif:FocalLength>
<exif:FocalPlaneXResolution>77360658/32768</exif:FocalPlaneXResolution>
<exif:FocalPlaneYResolution>77360658/32768</exif:FocalPlaneYResolution>
<exif:FocalPlaneResolutionUnit>3</exif:FocalPlaneResolutionUnit>
<exif:SensingMethod>2</exif:SensingMethod>
<exif:FileSource>3</exif:FileSource>
<exif:SceneType>1</exif:SceneType>
<exif:CustomRendered>0</exif:CustomRendered>
<exif:ExposureMode>1</exif:ExposureMode>
<exif:WhiteBalance>1</exif:WhiteBalance>
<exif:FocalLengthIn35mmFilm>735</exif:FocalLengthIn35mmFilm>
<exif:SceneCaptureType>0</exif:SceneCaptureType>
<exif:GainControl>0</exif:GainControl>
<exif:Contrast>0</exif:Contrast>
<exif:Saturation>0</exif:Saturation>
<exif:Sharpness>0</exif:Sharpness>
<exif:SubjectDistanceRange>0</exif:SubjectDistanceRange>
<exif:SubSecTime>15</exif:SubSecTime>
<exif:SubSecTimeOriginal>15</exif:SubSecTimeOriginal>
<exif:SubSecTimeDigitized>15</exif:SubSecTimeDigitized>
<exif:SerialNumber>3054442</exif:SerialNumber>
<exif:LensInfo>
<rdf:Seq>
<rdf:li>1500/10</rdf:li>
</rdf:Seq>
</exif:LensInfo>
<exif:Lens>150.0-600.0 mm f/5.0-6.3</exif:Lens>
<exif:SensitivityType>2</exif:SensitivityType>
EXIF from the properly exposed image:
<exif:ExifVersion>0231</exif:ExifVersion>
<exif
ixelXDimension>5568</exif
ixelXDimension>
<exif
ixelYDimension>3712</exif
ixelYDimension>
<exif
ateTimeOriginal>2020-06-10T14:20:58</exif
ateTimeOriginal>
<exif:ExposureTime>1/500</exif:ExposureTime>
<exif:FNumber>8/1</exif:FNumber>
<exif:ExposureProgram>1</exif:ExposureProgram>
<exif:ISOSpeedRatings>
<rdf:Seq>
<rdf:li>4000</rdf:li>
</rdf:Seq>
</exif:ISOSpeedRatings>
<exif:ShutterSpeedValue>8965784/1000000</exif:ShutterSpeedValue>
<exif:ApertureValue>6000000/1000000</exif:ApertureValue>
<exif:ExposureBiasValue>4/6</exif:ExposureBiasValue>
<exif:MaxApertureValue>53/10</exif:MaxApertureValue>
<exif:MeteringMode>3</exif:MeteringMode>
<exif:LightSource>9</exif:LightSource>
<exif:Flash rdf
arseType="Resource">
<exif:Fired>False</exif:Fired>
<exif:Return>0</exif:Return>
<exif:Mode>0</exif:Mode>
<exif:Function>False</exif:Function>
<exif:RedEyeMode>False</exif:RedEyeMode>
</exif:Flash>
<exif:FocalLength>4900/10</exif:FocalLength>
<exif:FocalPlaneXResolution>77360658/32768</exif:FocalPlaneXResolution>
<exif:FocalPlaneYResolution>77360658/32768</exif:FocalPlaneYResolution>
<exif:FocalPlaneResolutionUnit>3</exif:FocalPlaneResolutionUnit>
<exif:SensingMethod>2</exif:SensingMethod>
<exif:FileSource>3</exif:FileSource>
<exif:SceneType>1</exif:SceneType>
<exif:CustomRendered>0</exif:CustomRendered>
<exif:ExposureMode>1</exif:ExposureMode>
<exif:WhiteBalance>1</exif:WhiteBalance>
<exif:FocalLengthIn35mmFilm>735</exif:FocalLengthIn35mmFilm>
<exif:SceneCaptureType>0</exif:SceneCaptureType>
<exif:GainControl>2</exif:GainControl>
<exif:Contrast>0</exif:Contrast>
<exif:Saturation>0</exif:Saturation>
<exif:Sharpness>0</exif:Sharpness>
<exif:SubjectDistanceRange>0</exif:SubjectDistanceRange>
<exif:SubSecTime>99</exif:SubSecTime>
<exif:SubSecTimeOriginal>99</exif:SubSecTimeOriginal>
<exif:SubSecTimeDigitized>99</exif:SubSecTimeDigitized>
<exif:SerialNumber>3054442</exif:SerialNumber>
<exif:LensInfo>
<rdf:Seq>
<rdf:li>1500/10</rdf:li>
</rdf:Seq>
</exif:LensInfo>
<exif:Lens>150.0-600.0 mm f/5.0-6.3</exif:Lens>
<exif:SensitivityType>2</exif:SensitivityType>