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Nikon DSLR Cameras
D5100
D5100: Underexposure using flash
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<blockquote data-quote="jim.londos" data-source="post: 138697" data-attributes="member: 13790"><p><span style="color: #000000">Hi Pedro.</span></p><p></p><p><span style="color: #000000">Thanks for the comment. I don't think that I touched the flash settings. No flash compensation set in the camera.</span></p><p></p><p><span style="color: #000000">I have uploaded some test pictures below. In all three modes: P, A (set at f/1.8), S (set at 1/125), with and without flash, whereas the </span>ISO<span style="color: #000000"> settings are: 100 / Auto on / </span>ISO<span style="color: #000000"> limit 3200 / speed limit 1/125.</span></p><p><span style="color: #000000"></span></p><p><span style="color: #000000"></span>[ATTACH]33185[/ATTACH]</p><p>Filename - A - no flash - DSC_0384.JPGMake - NIKON CORPORATION</p><p>Model - NIKON D5100</p><p></p><p>ExposureTime - 1/125 seconds</p><p>FNumber - 1.80</p><p>ExposureProgram - Aperture priority</p><p>ISOSpeedRatings - 1400</p><p></p><p>MaxApertureValue - F 1.74</p><p>MeteringMode - Center weighted average</p><p>LightSource - Auto</p><p>Flash - Not fired</p><p>FocalLength - 35.00 mm</p><p></p><p>ExposureMode - Auto</p><p>White Balance - Auto</p><p></p><p>FocalLengthIn35mmFilm - 52 mm</p><p></p><p>ISO Setting - 1400</p><p>Image Quality - BASIC</p><p>White Balance - AUTO</p><p>Focus Mode - AF-A</p><p>Flash Setting - NORMAL</p><p></p><p>ISO 2 - 100</p><p></p><p>Flash Used - Not fired</p><p>Bracketing - 2162688</p><p>Noise Reduction - OFF</p><p></p><p></p><p></p><p>[ATTACH]33186[/ATTACH]</p><p>Filename - A - with flash - DSC_0385.JPGMake - NIKON CORPORATION</p><p>Model - NIKON D5100</p><p></p><p>ExposureTime - 1/125 seconds</p><p>FNumber - 1.80</p><p>ExposureProgram - Aperture priority</p><p>ISOSpeedRatings - 640</p><p></p><p>MaxApertureValue - F 1.74</p><p>MeteringMode - Center weighted average</p><p>LightSource - Auto</p><p>Flash - Flash fired, compulsory flash mode</p><p>FocalLength - 35.00 mm</p><p></p><p>FocalLengthIn35mmFilm - 52 mm</p><p>SceneCaptureType - Standard</p><p>GainControl - Low gain up</p><p></p><p>ISO Setting - 640</p><p>Image Quality - BASIC</p><p>White Balance - AUTO</p><p>Focus Mode - AF-A</p><p>Flash Setting - NORMAL</p><p>Flash Mode - Built-in,TTL-BL</p><p>White Balance Adjustment - 0</p><p>White Balance RB - 742</p><p>Exposure Adjustment - 68608</p><p>Thumbnail IFD offset - 11422</p><p>Flash Compensation - 67072</p><p>Lens type - AF-D G</p><p>Lens - 1514</p><p>Flash Used - On camera</p><p>Bracketing - 2162688</p><p>Noise Reduction - OFF</p><p>Total pictures - 10567</p><p></p><p></p><p></p><p>[ATTACH]33187[/ATTACH]</p><p>Filename - P - no flash - DSC_0382.JPGMake - NIKON CORPORATION</p><p>Model - NIKON D5100</p><p>Orientation - Top left</p><p>XResolution - 300</p><p>YResolution - 300</p><p>ResolutionUnit - Inch</p><p>Software - Ver.1.01</p><p>DateTime - 2013:04:17 17:09:08</p><p>YCbCrPositioning - Co-Sited</p><p>ExifOffset - 228</p><p>ExposureTime - 1/125 seconds</p><p>FNumber - 1.80</p><p>ExposureProgram - Normal program</p><p>ISOSpeedRatings - 1400</p><p>ExifVersion - 0230</p><p>DateTimeOriginal - 2013:04:17 17:09:08</p><p>DateTimeDigitized - 2013:04:17 17:09:08</p><p>ComponentsConfiguration - YCbCr</p><p>CompressedBitsPerPixel - 1 (bits/pixel)</p><p>ExposureBiasValue - 0.00</p><p>MaxApertureValue - F 1.74</p><p>MeteringMode - Center weighted average</p><p>LightSource - Auto</p><p>Flash - Not fired</p><p>FocalLength - 35.00 mm</p><p>UserComment - </p><p>SubsecTime - 60</p><p>SubsecTimeOriginal - 60</p><p>SubsecTimeDigitized - 60</p><p>FlashPixVersion - 0100</p><p>ColorSpace - sRGB</p><p>ExifImageWidth - 2464</p><p>ExifImageHeight - 1632</p><p>InteroperabilityOffset - 37112</p><p>SensingMethod - One-chip color area sensor</p><p>FileSource - Other</p><p>SceneType - Other</p><p>CustomRendered - Normal process</p><p>ExposureMode - Auto</p><p>White Balance - Auto</p><p>DigitalZoomRatio - 1 x</p><p>FocalLengthIn35mmFilm - 52 mm</p><p>SceneCaptureType - Standard</p><p>GainControl - High gain up</p><p>Contrast - Normal</p><p>Saturation - Normal</p><p>Sharpness - Normal</p><p>SubjectDistanceRange - Unknown</p><p></p><p></p><p>GPS information: - </p><p>GPSVersionID - 2.3.0.0</p><p></p><p></p><p>Maker Note (Vendor): - </p><p>Data version - 0210 (808595760)</p><p>ISO Setting - 1400</p><p>Image Quality - BASIC</p><p>White Balance - AUTO</p><p>Focus Mode - AF-A</p><p>Flash Setting - NORMAL</p><p>Flash Mode - </p><p>White Balance Adjustment - 0</p><p>White Balance RB - 742</p><p>Exposure Adjustment - 68608</p><p>Thumbnail IFD offset - 11422</p><p>Flash Compensation - 67072</p><p>ISO 2 - 100</p><p>Lens type - AF-D G</p><p>Lens - 1514</p><p>Flash Used - Not fired</p><p>Bracketing - 2162688</p><p>Noise Reduction - OFF</p><p>Total pictures - 10564</p><p></p><p></p><p>Thumbnail: - </p><p>Compression - 6 (JPG)</p><p>XResolution - 300</p><p>YResolution - 300</p><p>ResolutionUnit - Inch</p><p>JpegIFOffset - 37272</p><p>JpegIFByteCount - 8536</p><p>YCbCrPositioning - Co-Sited</p><p></p><p></p><p>[ATTACH]33188[/ATTACH]</p><p>Filename - P - no flash - DSC_0382.JPGMake - NIKON CORPORATION</p><p>Model - NIKON D5100</p><p>Orientation - Top left</p><p>XResolution - 300</p><p>YResolution - 300</p><p>ResolutionUnit - Inch</p><p>Software - Ver.1.01</p><p>DateTime - 2013:04:17 17:09:08</p><p>YCbCrPositioning - Co-Sited</p><p>ExifOffset - 228</p><p>ExposureTime - 1/125 seconds</p><p>FNumber - 1.80</p><p>ExposureProgram - Normal program</p><p>ISOSpeedRatings - 1400</p><p>ExifVersion - 0230</p><p>DateTimeOriginal - 2013:04:17 17:09:08</p><p>DateTimeDigitized - 2013:04:17 17:09:08</p><p>ComponentsConfiguration - YCbCr</p><p>CompressedBitsPerPixel - 1 (bits/pixel)</p><p>ExposureBiasValue - 0.00</p><p>MaxApertureValue - F 1.74</p><p>MeteringMode - Center weighted average</p><p>LightSource - Auto</p><p>Flash - Not fired</p><p>FocalLength - 35.00 mm</p><p>UserComment - </p><p>SubsecTime - 60</p><p>SubsecTimeOriginal - 60</p><p>SubsecTimeDigitized - 60</p><p>FlashPixVersion - 0100</p><p>ColorSpace - sRGB</p><p>ExifImageWidth - 2464</p><p>ExifImageHeight - 1632</p><p>InteroperabilityOffset - 37112</p><p>SensingMethod - One-chip color area sensor</p><p>FileSource - Other</p><p>SceneType - Other</p><p>CustomRendered - Normal process</p><p>ExposureMode - Auto</p><p>White Balance - Auto</p><p>DigitalZoomRatio - 1 x</p><p>FocalLengthIn35mmFilm - 52 mm</p><p>SceneCaptureType - Standard</p><p>GainControl - High gain up</p><p>Contrast - Normal</p><p>Saturation - Normal</p><p>Sharpness - Normal</p><p>SubjectDistanceRange - Unknown</p><p></p><p></p><p>GPS information: - </p><p>GPSVersionID - 2.3.0.0</p><p></p><p></p><p>Maker Note (Vendor): - </p><p>Data version - 0210 (808595760)</p><p>ISO Setting - 1400</p><p>Image Quality - BASIC</p><p>White Balance - AUTO</p><p>Focus Mode - AF-A</p><p>Flash Setting - NORMAL</p><p>Flash Mode - </p><p>White Balance Adjustment - 0</p><p>White Balance RB - 742</p><p>Exposure Adjustment - 68608</p><p>Thumbnail IFD offset - 11422</p><p>Flash Compensation - 67072</p><p>ISO 2 - 100</p><p>Lens type - AF-D G</p><p>Lens - 1514</p><p>Flash Used - Not fired</p><p>Bracketing - 2162688</p><p>Noise Reduction - OFF</p><p>Total pictures - 10564</p><p></p><p></p><p>Thumbnail: - </p><p>Compression - 6 (JPG)</p><p>XResolution - 300</p><p>YResolution - 300</p><p>ResolutionUnit - Inch</p><p>JpegIFOffset - 37272</p><p>JpegIFByteCount - 8536</p><p>YCbCrPositioning - Co-Sited</p><p></p><p></p><p>[ATTACH]33189[/ATTACH]</p><p>Filename - S - no flash - DSC_0386.JPGMake - NIKON CORPORATION</p><p>Model - NIKON D5100</p><p>Orientation - Top left</p><p>XResolution - 300</p><p>YResolution - 300</p><p>ResolutionUnit - Inch</p><p>Software - Ver.1.01</p><p>DateTime - 2013:04:17 17:10:53</p><p>YCbCrPositioning - Co-Sited</p><p>ExifOffset - 228</p><p>ExposureTime - 1/125 seconds</p><p>FNumber - 1.80</p><p>ExposureProgram - Shutter priority</p><p>ISOSpeedRatings - 1400</p><p>ExifVersion - 0230</p><p>DateTimeOriginal - 2013:04:17 17:10:53</p><p>DateTimeDigitized - 2013:04:17 17:10:53</p><p>ComponentsConfiguration - YCbCr</p><p>CompressedBitsPerPixel - 1 (bits/pixel)</p><p>ExposureBiasValue - 0.00</p><p>MaxApertureValue - F 1.74</p><p>MeteringMode - Center weighted average</p><p>LightSource - Auto</p><p>Flash - Not fired</p><p>FocalLength - 35.00 mm</p><p>UserComment - </p><p>SubsecTime - 50</p><p>SubsecTimeOriginal - 50</p><p>SubsecTimeDigitized - 50</p><p>FlashPixVersion - 0100</p><p>ColorSpace - sRGB</p><p>ExifImageWidth - 2464</p><p>ExifImageHeight - 1632</p><p>InteroperabilityOffset - 36962</p><p>SensingMethod - One-chip color area sensor</p><p>FileSource - Other</p><p>SceneType - Other</p><p>CustomRendered - Normal process</p><p>ExposureMode - Auto</p><p>White Balance - Auto</p><p>DigitalZoomRatio - 1 x</p><p>FocalLengthIn35mmFilm - 52 mm</p><p>SceneCaptureType - Standard</p><p>GainControl - High gain up</p><p>Contrast - Normal</p><p>Saturation - Normal</p><p>Sharpness - Normal</p><p>SubjectDistanceRange - Unknown</p><p></p><p></p><p>GPS information: - </p><p>GPSVersionID - 2.3.0.0</p><p></p><p></p><p>Maker Note (Vendor): - </p><p>Data version - 0210 (808595760)</p><p>ISO Setting - 1400</p><p>Image Quality - BASIC</p><p>White Balance - AUTO</p><p>Focus Mode - AF-A</p><p>Flash Setting - NORMAL</p><p>Flash Mode - </p><p>White Balance Adjustment - 0</p><p>White Balance RB - 742</p><p>Exposure Adjustment - 68608</p><p>Thumbnail IFD offset - 11422</p><p>Flash Compensation - 67072</p><p>ISO 2 - 100</p><p>Lens type - AF-D G</p><p>Lens - 1514</p><p>Flash Used - Not fired</p><p>Bracketing - 2162688</p><p>Noise Reduction - OFF</p><p>Total pictures - 10568</p><p></p><p></p><p>Thumbnail: - </p><p>Compression - 6 (JPG)</p><p>XResolution - 300</p><p>YResolution - 300</p><p>ResolutionUnit - Inch</p><p>JpegIFOffset - 37120</p><p>JpegIFByteCount - 8602</p><p>YCbCrPositioning - Co-Sited</p><p></p><p></p><p>[ATTACH]33190[/ATTACH]</p><p>Filename - S - with flash - DSC_0387.JPGMake - NIKON CORPORATION</p><p>Model - NIKON D5100</p><p>Orientation - Top left</p><p>XResolution - 300</p><p>YResolution - 300</p><p>ResolutionUnit - Inch</p><p>Software - Ver.1.01</p><p>DateTime - 2013:04:17 17:11:04</p><p>YCbCrPositioning - Co-Sited</p><p>ExifOffset - 228</p><p>ExposureTime - 1/125 seconds</p><p>FNumber - 1.80</p><p>ExposureProgram - Shutter priority</p><p>ISOSpeedRatings - 720</p><p>ExifVersion - 0230</p><p>DateTimeOriginal - 2013:04:17 17:11:04</p><p>DateTimeDigitized - 2013:04:17 17:11:04</p><p>ComponentsConfiguration - YCbCr</p><p>CompressedBitsPerPixel - 1 (bits/pixel)</p><p>ExposureBiasValue - 0.00</p><p>MaxApertureValue - F 1.74</p><p>MeteringMode - Center weighted average</p><p>LightSource - Auto</p><p>Flash - Flash fired, compulsory flash mode</p><p>FocalLength - 35.00 mm</p><p>UserComment - </p><p>SubsecTime - 20</p><p>SubsecTimeOriginal - 20</p><p>SubsecTimeDigitized - 20</p><p>FlashPixVersion - 0100</p><p>ColorSpace - sRGB</p><p>ExifImageWidth - 2464</p><p>ExifImageHeight - 1632</p><p>InteroperabilityOffset - 38286</p><p>SensingMethod - One-chip color area sensor</p><p>FileSource - Other</p><p>SceneType - Other</p><p>CustomRendered - Normal process</p><p>ExposureMode - Auto</p><p>White Balance - Auto</p><p>DigitalZoomRatio - 1 x</p><p>FocalLengthIn35mmFilm - 52 mm</p><p>SceneCaptureType - Standard</p><p>GainControl - Low gain up</p><p>Contrast - Normal</p><p>Saturation - Normal</p><p>Sharpness - Normal</p><p>SubjectDistanceRange - Unknown</p><p></p><p></p><p>GPS information: - </p><p>GPSVersionID - 2.3.0.0</p><p></p><p></p><p>Maker Note (Vendor): - </p><p>Data version - 0210 (808595760)</p><p>ISO Setting - 720</p><p>Image Quality - BASIC</p><p>White Balance - AUTO</p><p>Focus Mode - AF-A</p><p>Flash Setting - NORMAL</p><p>Flash Mode - Built-in,TTL-BL</p><p>White Balance Adjustment - 0</p><p>White Balance RB - 742</p><p>Exposure Adjustment - 68608</p><p>Thumbnail IFD offset - 11422</p><p>Flash Compensation - 67072</p><p>ISO 2 - 100</p><p>Lens type - AF-D G</p><p>Lens - 1514</p><p>Flash Used - On camera</p><p>Bracketing - 2162688</p><p>Noise Reduction - OFF</p><p>Total pictures - 10569</p><p></p><p></p><p>Thumbnail: - </p><p>Compression - 6 (JPG)</p><p>XResolution - 300</p><p>YResolution - 300</p><p>ResolutionUnit - Inch</p><p>JpegIFOffset - 38444</p><p>JpegIFByteCount - 8761</p><p>YCbCrPositioning - Co-Sited</p><p></p><p><span style="color: #000000">As you can see, in both A and S, the D5100 doesn't alter neither speed nor aperture when activating the flash. It just reduces the sensitivity from 1400 to 640-720. In P it narrows the aperture to f/7.1 and increases the sensitivity to 3200.</span></p><p></p><p><span style="color: #000000">Do you think this makes sense?</span><span style="color: #000000"></span></p><p><span style="color: #000000"></span></p><p><span style="color: #000000"></span></p></blockquote><p></p>
[QUOTE="jim.londos, post: 138697, member: 13790"] [COLOR=#000000]Hi Pedro.[/COLOR] [COLOR=#000000]Thanks for the comment. I don't think that I touched the flash settings. No flash compensation set in the camera.[/COLOR] [COLOR=#000000]I have uploaded some test pictures below. In all three modes: P, A (set at f/1.8), S (set at 1/125), with and without flash, whereas the [/COLOR]ISO[COLOR=#000000] settings are: 100 / Auto on / [/COLOR]ISO[COLOR=#000000] limit 3200 / speed limit 1/125. [/COLOR][ATTACH=CONFIG]33185._xfImport[/ATTACH] Filename - A - no flash - DSC_0384.JPGMake - NIKON CORPORATION Model - NIKON D5100 ExposureTime - 1/125 seconds FNumber - 1.80 ExposureProgram - Aperture priority ISOSpeedRatings - 1400 MaxApertureValue - F 1.74 MeteringMode - Center weighted average LightSource - Auto Flash - Not fired FocalLength - 35.00 mm ExposureMode - Auto White Balance - Auto FocalLengthIn35mmFilm - 52 mm ISO Setting - 1400 Image Quality - BASIC White Balance - AUTO Focus Mode - AF-A Flash Setting - NORMAL ISO 2 - 100 Flash Used - Not fired Bracketing - 2162688 Noise Reduction - OFF [ATTACH=CONFIG]33186._xfImport[/ATTACH] Filename - A - with flash - DSC_0385.JPGMake - NIKON CORPORATION Model - NIKON D5100 ExposureTime - 1/125 seconds FNumber - 1.80 ExposureProgram - Aperture priority ISOSpeedRatings - 640 MaxApertureValue - F 1.74 MeteringMode - Center weighted average LightSource - Auto Flash - Flash fired, compulsory flash mode FocalLength - 35.00 mm FocalLengthIn35mmFilm - 52 mm SceneCaptureType - Standard GainControl - Low gain up ISO Setting - 640 Image Quality - BASIC White Balance - AUTO Focus Mode - AF-A Flash Setting - NORMAL Flash Mode - Built-in,TTL-BL White Balance Adjustment - 0 White Balance RB - 742 Exposure Adjustment - 68608 Thumbnail IFD offset - 11422 Flash Compensation - 67072 Lens type - AF-D G Lens - 1514 Flash Used - On camera Bracketing - 2162688 Noise Reduction - OFF Total pictures - 10567 [ATTACH=CONFIG]33187._xfImport[/ATTACH] Filename - P - no flash - DSC_0382.JPGMake - NIKON CORPORATION Model - NIKON D5100 Orientation - Top left XResolution - 300 YResolution - 300 ResolutionUnit - Inch Software - Ver.1.01 DateTime - 2013:04:17 17:09:08 YCbCrPositioning - Co-Sited ExifOffset - 228 ExposureTime - 1/125 seconds FNumber - 1.80 ExposureProgram - Normal program ISOSpeedRatings - 1400 ExifVersion - 0230 DateTimeOriginal - 2013:04:17 17:09:08 DateTimeDigitized - 2013:04:17 17:09:08 ComponentsConfiguration - YCbCr CompressedBitsPerPixel - 1 (bits/pixel) ExposureBiasValue - 0.00 MaxApertureValue - F 1.74 MeteringMode - Center weighted average LightSource - Auto Flash - Not fired FocalLength - 35.00 mm UserComment - SubsecTime - 60 SubsecTimeOriginal - 60 SubsecTimeDigitized - 60 FlashPixVersion - 0100 ColorSpace - sRGB ExifImageWidth - 2464 ExifImageHeight - 1632 InteroperabilityOffset - 37112 SensingMethod - One-chip color area sensor FileSource - Other SceneType - Other CustomRendered - Normal process ExposureMode - Auto White Balance - Auto DigitalZoomRatio - 1 x FocalLengthIn35mmFilm - 52 mm SceneCaptureType - Standard GainControl - High gain up Contrast - Normal Saturation - Normal Sharpness - Normal SubjectDistanceRange - Unknown GPS information: - GPSVersionID - 2.3.0.0 Maker Note (Vendor): - Data version - 0210 (808595760) ISO Setting - 1400 Image Quality - BASIC White Balance - AUTO Focus Mode - AF-A Flash Setting - NORMAL Flash Mode - White Balance Adjustment - 0 White Balance RB - 742 Exposure Adjustment - 68608 Thumbnail IFD offset - 11422 Flash Compensation - 67072 ISO 2 - 100 Lens type - AF-D G Lens - 1514 Flash Used - Not fired Bracketing - 2162688 Noise Reduction - OFF Total pictures - 10564 Thumbnail: - Compression - 6 (JPG) XResolution - 300 YResolution - 300 ResolutionUnit - Inch JpegIFOffset - 37272 JpegIFByteCount - 8536 YCbCrPositioning - Co-Sited [ATTACH=CONFIG]33188._xfImport[/ATTACH] Filename - P - no flash - DSC_0382.JPGMake - NIKON CORPORATION Model - NIKON D5100 Orientation - Top left XResolution - 300 YResolution - 300 ResolutionUnit - Inch Software - Ver.1.01 DateTime - 2013:04:17 17:09:08 YCbCrPositioning - Co-Sited ExifOffset - 228 ExposureTime - 1/125 seconds FNumber - 1.80 ExposureProgram - Normal program ISOSpeedRatings - 1400 ExifVersion - 0230 DateTimeOriginal - 2013:04:17 17:09:08 DateTimeDigitized - 2013:04:17 17:09:08 ComponentsConfiguration - YCbCr CompressedBitsPerPixel - 1 (bits/pixel) ExposureBiasValue - 0.00 MaxApertureValue - F 1.74 MeteringMode - Center weighted average LightSource - Auto Flash - Not fired FocalLength - 35.00 mm UserComment - SubsecTime - 60 SubsecTimeOriginal - 60 SubsecTimeDigitized - 60 FlashPixVersion - 0100 ColorSpace - sRGB ExifImageWidth - 2464 ExifImageHeight - 1632 InteroperabilityOffset - 37112 SensingMethod - One-chip color area sensor FileSource - Other SceneType - Other CustomRendered - Normal process ExposureMode - Auto White Balance - Auto DigitalZoomRatio - 1 x FocalLengthIn35mmFilm - 52 mm SceneCaptureType - Standard GainControl - High gain up Contrast - Normal Saturation - Normal Sharpness - Normal SubjectDistanceRange - Unknown GPS information: - GPSVersionID - 2.3.0.0 Maker Note (Vendor): - Data version - 0210 (808595760) ISO Setting - 1400 Image Quality - BASIC White Balance - AUTO Focus Mode - AF-A Flash Setting - NORMAL Flash Mode - White Balance Adjustment - 0 White Balance RB - 742 Exposure Adjustment - 68608 Thumbnail IFD offset - 11422 Flash Compensation - 67072 ISO 2 - 100 Lens type - AF-D G Lens - 1514 Flash Used - Not fired Bracketing - 2162688 Noise Reduction - OFF Total pictures - 10564 Thumbnail: - Compression - 6 (JPG) XResolution - 300 YResolution - 300 ResolutionUnit - Inch JpegIFOffset - 37272 JpegIFByteCount - 8536 YCbCrPositioning - Co-Sited [ATTACH=CONFIG]33189._xfImport[/ATTACH] Filename - S - no flash - DSC_0386.JPGMake - NIKON CORPORATION Model - NIKON D5100 Orientation - Top left XResolution - 300 YResolution - 300 ResolutionUnit - Inch Software - Ver.1.01 DateTime - 2013:04:17 17:10:53 YCbCrPositioning - Co-Sited ExifOffset - 228 ExposureTime - 1/125 seconds FNumber - 1.80 ExposureProgram - Shutter priority ISOSpeedRatings - 1400 ExifVersion - 0230 DateTimeOriginal - 2013:04:17 17:10:53 DateTimeDigitized - 2013:04:17 17:10:53 ComponentsConfiguration - YCbCr CompressedBitsPerPixel - 1 (bits/pixel) ExposureBiasValue - 0.00 MaxApertureValue - F 1.74 MeteringMode - Center weighted average LightSource - Auto Flash - Not fired FocalLength - 35.00 mm UserComment - SubsecTime - 50 SubsecTimeOriginal - 50 SubsecTimeDigitized - 50 FlashPixVersion - 0100 ColorSpace - sRGB ExifImageWidth - 2464 ExifImageHeight - 1632 InteroperabilityOffset - 36962 SensingMethod - One-chip color area sensor FileSource - Other SceneType - Other CustomRendered - Normal process ExposureMode - Auto White Balance - Auto DigitalZoomRatio - 1 x FocalLengthIn35mmFilm - 52 mm SceneCaptureType - Standard GainControl - High gain up Contrast - Normal Saturation - Normal Sharpness - Normal SubjectDistanceRange - Unknown GPS information: - GPSVersionID - 2.3.0.0 Maker Note (Vendor): - Data version - 0210 (808595760) ISO Setting - 1400 Image Quality - BASIC White Balance - AUTO Focus Mode - AF-A Flash Setting - NORMAL Flash Mode - White Balance Adjustment - 0 White Balance RB - 742 Exposure Adjustment - 68608 Thumbnail IFD offset - 11422 Flash Compensation - 67072 ISO 2 - 100 Lens type - AF-D G Lens - 1514 Flash Used - Not fired Bracketing - 2162688 Noise Reduction - OFF Total pictures - 10568 Thumbnail: - Compression - 6 (JPG) XResolution - 300 YResolution - 300 ResolutionUnit - Inch JpegIFOffset - 37120 JpegIFByteCount - 8602 YCbCrPositioning - Co-Sited [ATTACH=CONFIG]33190._xfImport[/ATTACH] Filename - S - with flash - DSC_0387.JPGMake - NIKON CORPORATION Model - NIKON D5100 Orientation - Top left XResolution - 300 YResolution - 300 ResolutionUnit - Inch Software - Ver.1.01 DateTime - 2013:04:17 17:11:04 YCbCrPositioning - Co-Sited ExifOffset - 228 ExposureTime - 1/125 seconds FNumber - 1.80 ExposureProgram - Shutter priority ISOSpeedRatings - 720 ExifVersion - 0230 DateTimeOriginal - 2013:04:17 17:11:04 DateTimeDigitized - 2013:04:17 17:11:04 ComponentsConfiguration - YCbCr CompressedBitsPerPixel - 1 (bits/pixel) ExposureBiasValue - 0.00 MaxApertureValue - F 1.74 MeteringMode - Center weighted average LightSource - Auto Flash - Flash fired, compulsory flash mode FocalLength - 35.00 mm UserComment - SubsecTime - 20 SubsecTimeOriginal - 20 SubsecTimeDigitized - 20 FlashPixVersion - 0100 ColorSpace - sRGB ExifImageWidth - 2464 ExifImageHeight - 1632 InteroperabilityOffset - 38286 SensingMethod - One-chip color area sensor FileSource - Other SceneType - Other CustomRendered - Normal process ExposureMode - Auto White Balance - Auto DigitalZoomRatio - 1 x FocalLengthIn35mmFilm - 52 mm SceneCaptureType - Standard GainControl - Low gain up Contrast - Normal Saturation - Normal Sharpness - Normal SubjectDistanceRange - Unknown GPS information: - GPSVersionID - 2.3.0.0 Maker Note (Vendor): - Data version - 0210 (808595760) ISO Setting - 720 Image Quality - BASIC White Balance - AUTO Focus Mode - AF-A Flash Setting - NORMAL Flash Mode - Built-in,TTL-BL White Balance Adjustment - 0 White Balance RB - 742 Exposure Adjustment - 68608 Thumbnail IFD offset - 11422 Flash Compensation - 67072 ISO 2 - 100 Lens type - AF-D G Lens - 1514 Flash Used - On camera Bracketing - 2162688 Noise Reduction - OFF Total pictures - 10569 Thumbnail: - Compression - 6 (JPG) XResolution - 300 YResolution - 300 ResolutionUnit - Inch JpegIFOffset - 38444 JpegIFByteCount - 8761 YCbCrPositioning - Co-Sited [COLOR=#000000]As you can see, in both A and S, the D5100 doesn't alter neither speed nor aperture when activating the flash. It just reduces the sensitivity from 1400 to 640-720. In P it narrows the aperture to f/7.1 and increases the sensitivity to 3200.[/COLOR] [COLOR=#000000]Do you think this makes sense?[/COLOR][COLOR=#000000] [/COLOR] [/QUOTE]
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D5100: Underexposure using flash
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