Salve a tutti,
nella seguente foto stando ai dati exif (vedi sotto) la profondità di campo va da 0.59 m a 1.21 m, ossia la distanza di MAF è circa 0.8 m. Tuttavia,
la distanza effettiva dei bimbi è di circa 2.5-3 m, come si può facilmente dedurre considerando che questi sono alti circa 1.3 m e che l'angolo di vista è di circa 72 gradi.
Il punto di messa a fuoco (macchinetta in AF-S con priorità alla messa a fuoco) è grossomodo sulla faccia del primo bimbo sulla sinistra (quello con il maglione a righe)
e i bimbi mi sembrano perfettamente a fuoco, il dubbio quindi è: i dati exif sulla profondità di campo sono sbagliati? E' possibile ciò?
Ringrazio anticipatamente tutti per le perle di saggezza che vorrete dispensare,
saluti Cristiano
ExifTool Version Number : 10.28
File Name : DSC_1810.NEF
Directory : .
File Size : 28 MB
File Modification Date/Time : 2016:09:24 19:47:40+02:00
File Access Date/Time : 2016:09:30 16:22:44+02:00
File Inode Change Date/Time : 2016:09:25 12:19:50+02:00
File Permissions : rwxrwxrwx
File Type : NEF
File Type Extension : nef
MIME Type : image/x-nikon-nef
Exif Byte Order : Little-endian (Intel, II)
Make : NIKON CORPORATION
Camera Model Name : NIKON D7200
Orientation : Rotate 270 CW
Software : Ver.1.01
Modify Date : 2016:09:24 19:47:40
Artist :
Jpg From Raw Start : 973824
Jpg From Raw Length : 1268354
Y Cb Cr Positioning : Co-sited
Image Width : 6016
Image Height : 4016
Bits Per Sample : 14
Compression : Nikon NEF Compressed
Photometric Interpretation : Color Filter Array
Strip Offsets : 2242560
Samples Per Pixel : 1
Rows Per Strip : 4016
Strip Byte Counts : 26644648
X Resolution : 300
Y Resolution : 300
Planar Configuration : Chunky
Resolution Unit : inches
CFA Repeat Pattern Dim : 2 2
CFA Pattern 2 : 0 1 1 2
Subfile Type : Reduced-resolution image
Other Image Start : 239104
Other Image Length : 734418
Reference Black White : 0 255 0 255 0 255
Creator Tool : NIKON D7200 Ver.1.01
Copyright :
Exposure Time : 1/60
F Number : 5.6
Exposure Program : Aperture-priority AE
ISO : 800
Sensitivity Type : Recommended Exposure Index
Create Date : 2016:09:24 19:47:40
Exposure Compensation : 0
Max Aperture Value : 3.5
Metering Mode : Multi-segment
Light Source : Cloudy
Flash : On, Return detected
Focal Length : 16.0 mm
Maker Note Version : 2.11
Quality : RAW
White Balance : Cloudy
Focus Mode : AF-S
Flash Setting : Normal
Flash Type : Optional,TTL
White Balance Fine Tune : 0 0
WB RB Levels : 2.6171875 1.44921875 1 1
Program Shift : 0
Exposure Difference : -3.2
Preview Image Start : 42272
Preview Image Length : 138393
Flash Exposure Compensation : 0
External Flash Exposure Comp : 0
Flash Exposure Bracket Value : 0.0
Exposure Bracket Value : 0
Crop Hi Speed : On (6016x4016 cropped to 6016x4016 at pixel 0,0)
Exposure Tuning : 0
Serial Number : 4372695
Color Space : sRGB
VR Info Version : 0100
Vibration Reduction : On
VR Mode : Normal
Active D-Lighting : Off
Picture Control Version : 0200
Picture Control Name : Standard
Picture Control Base : Standard
Picture Control Adjust : Default Settings
Picture Control Quick Adjust : Normal
Clarity : 1.00
Brightness : Normal
Hue : None
Filter Effect : n/a
Toning Effect : n/a
Toning Saturation : n/a
Time Zone : +00:00
Daylight Savings : Yes
Date Display Format : D/M/Y
ISO Expansion : Off
ISO2 : 200
ISO Expansion 2 : Off
Vignette Control : Off
Auto Distortion Control : Off
Black Level : 600 600 600 600
Lens Type : G VR
Lens : 16-85mm f/3.5-5.6
Flash Mode : Fired, External
Shooting Mode : Single-Frame, Auto ISO
Contrast Curve : (Binary data 578 bytes, use -b option to extract)
Shot Info Version : 0236
Firmware Version : 1.01b
NEF Compression : Lossless
Noise Reduction : Off
NEF Linearization Table : (Binary data 46 bytes, use -b option to extract)
Color Balance Version : 0224
Lens Data Version : 0204
Exit Pupil Position : 128.0 mm
AF Aperture : 3.6
Focus Position : 0x22
Focus Distance : 0.79 m
Lens ID Number : 153
Lens F Stops : 5.33
Min Focal Length : 16.3 mm
Max Focal Length : 84.8 mm
Max Aperture At Min Focal : 3.6
Max Aperture At Max Focal : 5.7
MCU Version : 155
Effective Max Aperture : 3.6
Raw Image Center : 3008 2008
Retouch History : None
Shutter Count : 1949
Flash Info Version : 0107
External Flash Status : Unknown (0x1)
Vari Program :
Multi Exposure Version : 0100
Multi Exposure Mode : Off
Multi Exposure Shots : 0
Multi Exposure Auto Gain : Off
High ISO Noise Reduction : Normal
Power Up Time : 2016:08:28 22:51:46
AF Info 2 Version : 0100
Contrast Detect AF : Off
AF Area Mode : Single Area
Phase Detect AF : On (51-point)
Primary AF Point : C7
AF Points Used : C7
Contrast Detect AF In Focus : No
File Info Version : 0100
Memory Card Number : 0
Directory Number : 101
File Number : 1810
AF Fine Tune : Off
AF Fine Tune Index : n/a
AF Fine Tune Adj : 0
Retouch Info Version : 0200
Retouch NEF Processing : Off
User Comment :
Sub Sec Time : 52
Sub Sec Time Original : 52
Sub Sec Time Digitized : 52
Sensing Method : One-chip color area
File Source : Digital Camera
Scene Type : Directly photographed
Custom Rendered : Normal
Exposure Mode : Auto
Digital Zoom Ratio : 1
Focal Length In 35mm Format : 24 mm
Scene Capture Type : Standard
Gain Control : Low gain up
Contrast : Normal
Saturation : Normal
Sharpness : Normal
Subject Distance Range : Unknown
GPS Version ID : 2.3.0.0
Date/Time Original : 2016:09:24 19:47:40
TIFF-EP Standard ID : 1 0 0 0
Aperture : 5.6
Auto Focus : On
Blue Balance : 1.449219
CFA Pattern : [Red,Green][Green,Blue]
Image Size : 6016x4016
Jpg From Raw : (Binary data 1268354 bytes, use -b option to extract)
Lens ID : AF-S DX VR Zoom-Nikkor 16-85mm f/3.5-5.6G ED
Lens : 16-85mm f/3.5-5.6 G VR
Megapixels : 24.2
Other Image : (Binary data 734418 bytes, use -b option to extract)
Preview Image : (Binary data 138393 bytes, use -b option to extract)
Red Balance : 2.617188
Scale Factor To 35 mm Equivalent: 1.5
Shutter Speed : 1/60
Create Date : 2016:09:24 19:47:40.52
Date/Time Original : 2016:09:24 19:47:40.52
Modify Date : 2016:09:24 19:47:40.52
Thumbnail TIFF : (Binary data 57816 bytes, use -b option to extract)
Circle Of Confusion : 0.020 mm
Depth Of Field : 0.61 m (0.59 - 1.21 m)
Field Of View : 72.6 deg (1.17 m)
Focal Length : 16.0 mm (35 mm equivalent: 24.0 mm)
Hyperfocal Distance : 2.28 m
Light Value : 7.9
nella seguente foto stando ai dati exif (vedi sotto) la profondità di campo va da 0.59 m a 1.21 m, ossia la distanza di MAF è circa 0.8 m. Tuttavia,
la distanza effettiva dei bimbi è di circa 2.5-3 m, come si può facilmente dedurre considerando che questi sono alti circa 1.3 m e che l'angolo di vista è di circa 72 gradi.
Il punto di messa a fuoco (macchinetta in AF-S con priorità alla messa a fuoco) è grossomodo sulla faccia del primo bimbo sulla sinistra (quello con il maglione a righe)
e i bimbi mi sembrano perfettamente a fuoco, il dubbio quindi è: i dati exif sulla profondità di campo sono sbagliati? E' possibile ciò?
Ringrazio anticipatamente tutti per le perle di saggezza che vorrete dispensare,
saluti Cristiano
ExifTool Version Number : 10.28
File Name : DSC_1810.NEF
Directory : .
File Size : 28 MB
File Modification Date/Time : 2016:09:24 19:47:40+02:00
File Access Date/Time : 2016:09:30 16:22:44+02:00
File Inode Change Date/Time : 2016:09:25 12:19:50+02:00
File Permissions : rwxrwxrwx
File Type : NEF
File Type Extension : nef
MIME Type : image/x-nikon-nef
Exif Byte Order : Little-endian (Intel, II)
Make : NIKON CORPORATION
Camera Model Name : NIKON D7200
Orientation : Rotate 270 CW
Software : Ver.1.01
Modify Date : 2016:09:24 19:47:40
Artist :
Jpg From Raw Start : 973824
Jpg From Raw Length : 1268354
Y Cb Cr Positioning : Co-sited
Image Width : 6016
Image Height : 4016
Bits Per Sample : 14
Compression : Nikon NEF Compressed
Photometric Interpretation : Color Filter Array
Strip Offsets : 2242560
Samples Per Pixel : 1
Rows Per Strip : 4016
Strip Byte Counts : 26644648
X Resolution : 300
Y Resolution : 300
Planar Configuration : Chunky
Resolution Unit : inches
CFA Repeat Pattern Dim : 2 2
CFA Pattern 2 : 0 1 1 2
Subfile Type : Reduced-resolution image
Other Image Start : 239104
Other Image Length : 734418
Reference Black White : 0 255 0 255 0 255
Creator Tool : NIKON D7200 Ver.1.01
Copyright :
Exposure Time : 1/60
F Number : 5.6
Exposure Program : Aperture-priority AE
ISO : 800
Sensitivity Type : Recommended Exposure Index
Create Date : 2016:09:24 19:47:40
Exposure Compensation : 0
Max Aperture Value : 3.5
Metering Mode : Multi-segment
Light Source : Cloudy
Flash : On, Return detected
Focal Length : 16.0 mm
Maker Note Version : 2.11
Quality : RAW
White Balance : Cloudy
Focus Mode : AF-S
Flash Setting : Normal
Flash Type : Optional,TTL
White Balance Fine Tune : 0 0
WB RB Levels : 2.6171875 1.44921875 1 1
Program Shift : 0
Exposure Difference : -3.2
Preview Image Start : 42272
Preview Image Length : 138393
Flash Exposure Compensation : 0
External Flash Exposure Comp : 0
Flash Exposure Bracket Value : 0.0
Exposure Bracket Value : 0
Crop Hi Speed : On (6016x4016 cropped to 6016x4016 at pixel 0,0)
Exposure Tuning : 0
Serial Number : 4372695
Color Space : sRGB
VR Info Version : 0100
Vibration Reduction : On
VR Mode : Normal
Active D-Lighting : Off
Picture Control Version : 0200
Picture Control Name : Standard
Picture Control Base : Standard
Picture Control Adjust : Default Settings
Picture Control Quick Adjust : Normal
Clarity : 1.00
Brightness : Normal
Hue : None
Filter Effect : n/a
Toning Effect : n/a
Toning Saturation : n/a
Time Zone : +00:00
Daylight Savings : Yes
Date Display Format : D/M/Y
ISO Expansion : Off
ISO2 : 200
ISO Expansion 2 : Off
Vignette Control : Off
Auto Distortion Control : Off
Black Level : 600 600 600 600
Lens Type : G VR
Lens : 16-85mm f/3.5-5.6
Flash Mode : Fired, External
Shooting Mode : Single-Frame, Auto ISO
Contrast Curve : (Binary data 578 bytes, use -b option to extract)
Shot Info Version : 0236
Firmware Version : 1.01b
NEF Compression : Lossless
Noise Reduction : Off
NEF Linearization Table : (Binary data 46 bytes, use -b option to extract)
Color Balance Version : 0224
Lens Data Version : 0204
Exit Pupil Position : 128.0 mm
AF Aperture : 3.6
Focus Position : 0x22
Focus Distance : 0.79 m
Lens ID Number : 153
Lens F Stops : 5.33
Min Focal Length : 16.3 mm
Max Focal Length : 84.8 mm
Max Aperture At Min Focal : 3.6
Max Aperture At Max Focal : 5.7
MCU Version : 155
Effective Max Aperture : 3.6
Raw Image Center : 3008 2008
Retouch History : None
Shutter Count : 1949
Flash Info Version : 0107
External Flash Status : Unknown (0x1)
Vari Program :
Multi Exposure Version : 0100
Multi Exposure Mode : Off
Multi Exposure Shots : 0
Multi Exposure Auto Gain : Off
High ISO Noise Reduction : Normal
Power Up Time : 2016:08:28 22:51:46
AF Info 2 Version : 0100
Contrast Detect AF : Off
AF Area Mode : Single Area
Phase Detect AF : On (51-point)
Primary AF Point : C7
AF Points Used : C7
Contrast Detect AF In Focus : No
File Info Version : 0100
Memory Card Number : 0
Directory Number : 101
File Number : 1810
AF Fine Tune : Off
AF Fine Tune Index : n/a
AF Fine Tune Adj : 0
Retouch Info Version : 0200
Retouch NEF Processing : Off
User Comment :
Sub Sec Time : 52
Sub Sec Time Original : 52
Sub Sec Time Digitized : 52
Sensing Method : One-chip color area
File Source : Digital Camera
Scene Type : Directly photographed
Custom Rendered : Normal
Exposure Mode : Auto
Digital Zoom Ratio : 1
Focal Length In 35mm Format : 24 mm
Scene Capture Type : Standard
Gain Control : Low gain up
Contrast : Normal
Saturation : Normal
Sharpness : Normal
Subject Distance Range : Unknown
GPS Version ID : 2.3.0.0
Date/Time Original : 2016:09:24 19:47:40
TIFF-EP Standard ID : 1 0 0 0
Aperture : 5.6
Auto Focus : On
Blue Balance : 1.449219
CFA Pattern : [Red,Green][Green,Blue]
Image Size : 6016x4016
Jpg From Raw : (Binary data 1268354 bytes, use -b option to extract)
Lens ID : AF-S DX VR Zoom-Nikkor 16-85mm f/3.5-5.6G ED
Lens : 16-85mm f/3.5-5.6 G VR
Megapixels : 24.2
Other Image : (Binary data 734418 bytes, use -b option to extract)
Preview Image : (Binary data 138393 bytes, use -b option to extract)
Red Balance : 2.617188
Scale Factor To 35 mm Equivalent: 1.5
Shutter Speed : 1/60
Create Date : 2016:09:24 19:47:40.52
Date/Time Original : 2016:09:24 19:47:40.52
Modify Date : 2016:09:24 19:47:40.52
Thumbnail TIFF : (Binary data 57816 bytes, use -b option to extract)
Circle Of Confusion : 0.020 mm
Depth Of Field : 0.61 m (0.59 - 1.21 m)
Field Of View : 72.6 deg (1.17 m)
Focal Length : 16.0 mm (35 mm equivalent: 24.0 mm)
Hyperfocal Distance : 2.28 m
Light Value : 7.9
