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Old Mar 18, 2006, 2:40 PM   #21
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The image's EXIF data contains this info - my image browser allows me to inspect these values. It would be nice if this would show up on the LCD.

hawks1 wrote:
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Mchnz-

I'm confused - where do you get a read-out of the focal length of the picture that you have just taken? On the S2 is it given on the playback histogram?
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Old Mar 18, 2006, 11:52 PM   #22
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Mchnz-

Thanks for the info. However, andI apologize, I'm still not following you. Where exactly do I find the image's EXIF data?
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Old Mar 19, 2006, 4:00 AM   #23
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Each image internally contains EXIF data written by the camera when the image was taken. EXIF is an agreed upon standard for storing such data. This includes many of the camera settings. The ZoomBrowser PC software that came with the camera can display the EXIF data for any image downloaded onto the PC: Right-mouse, Properties, Shooting Information. But it only displays a subset of the values.

There is also third party software that can display EXIF data. EXIF includes many standard tagged values as well custom vendor tags - not all software will understand all of the tags (especially the custom ones). Googling EXIF will turn up more info, and this might be a good place to start: http://www.exif.org/

To give you some idea of the complete range of data stored, here is a text dump of all the tags for an image I took yesterday. Normally software takes this and translates it into something more readable. The actual values are represented as ASCII (text), short, long, ratio, and arrays [] of values. Note many tags are Unknown - which means they are non-standard and vendor defined (it's sometimes possible to work out their meaning by taking the same image after changing one camera setting and then comparing the EXIF).

Intel format
IFD 0 (Image) at offset 8:
Make: (0x010F) ASCII=Canon @ 122
Model: (0x0110) ASCII=Canon PowerShot S2 IS @ 128
Orientation: (0x0112) Short=1 @ 42
XResolution: (0x011A) Ratio=180 @ 160
YResolution: (0x011B) Ratio=180 @ 168
ResolutionUnit: (0x0128) Short=Pixels/Inch @ 78
DateTime: (0x0132) ASCII=2006:03:18 12:58:15 @ 176
YCbCrPositioning: (0x0213) Short=1 @ 102
ExifOffset: (0x8769) Long=196 @ 114
EXIF SubIFD at offset 196:
ExposureTime: (0x829A) Ratio=1/25 @ 574
FNumber: (0x829D) Ratio=35/10 @ 582
ExifVersion: (0x9000) Undefined=[48, 50, 50, 48] @ 230
DateTimeOriginal: (0x9003) ASCII=2006:03:18 12:58:15 @ 590
DateTimeDigitized: (0x9004) ASCII=2006:03:18 12:58:15 @ 610
ComponentsConfiguration: (0x9101) Undefined=YCbCr @ 266
CompressedBitsPerPixel: (0x9102) Ratio=5 @ 630
ShutterSpeedValue: (0x9201) Signed Ratio=149/32 @ 638
ApertureValue: (0x9202) Ratio=116/32 @ 646
ExposureBiasValue: (0x9204) Signed Ratio=-6/3 @ 654
MaxApertureValue: (0x9205) Ratio=116/32 @ 662
MeteringMode: (0x9207) Short=5 @ 338
Flash: (0x9209) Short=Off @ 350
FocalLength: (0x920A) Ratio=72000/1000 @ 670
MakerNote: (0x927C) Undefined=[] @ 678
UserComment: (0x9286) Undefined=[] @ 1886
FlashPixVersion: (0xA000) Undefined=[48, 49, 48, 48] @ 398
ColorSpace: (0xA001) Short=1 @ 410
ExifImageWidth: (0xA002) Short=2592 @ 422
ExifImageLength: (0xA003) Short=1944 @ 434
InteroperabilityOffset: (0xA005) Long=2174 @ 446
FocalPlaneXResolution: (0xA20E) Ratio=2592000/225 @ 2150
FocalPlaneYResolution: (0xA20F) Ratio=1944000/168 @ 2158
FocalPlaneResolutionUnit: (0xA210) Short=2 @ 482
SensingMethod: (0xA217) Short=2 @ 494
FileSource: (0xA300) Undefined=Digital Camera @ 506
Tag 0xA401: (0xA401) Short=0 @ 518
Tag 0xA402: (0xA402) Short=1 @ 530
Tag 0xA403: (0xA403) Short=1 @ 542
Tag 0xA404: (0xA404) Ratio=2592/2592 @ 2166
Tag 0xA406: (0xA406) Short=0 @ 566
EXIF Interoperability SubSubIFD at offset 2174:
InteroperabilityIndex: (0x0001) ASCII=R98 @ 2184
InteroperabilityVersion: (0x0002) Undefined=[48, 49, 48, 48] @ 2196
RelatedImageWidth: (0x1001) Short=2592 @ 2208
RelatedImageLength: (0x1002) Short=1944 @ 2220
EXIF MakerNote SubSubIFD at offset 2174:
Tag 0x0001: (0x0001) Short=[92, 2, 0, 5, 0, 3, 0, 4, 65535, 1, 0, 1, 0, 0, 0, 0, 17, 3, 1, 8197, 3, 32767, 65535, 7200, 600, 100, 116, 192, 65535, 0, 0, 0, 0, 0, 2, 0, 2592, 2592, 0, 0, 0, 0, 32767, 32767, 1, 1] @ 924
Tag 0x0002: (0x0002) Short=[2, 7200, 230, 172] @ 1016
Tag 0x0003: (0x0003) Short=[0, 0, 0, 0] @ 1024
Tag 0x0004: (0x0004) Short=[68, 0, 160, 37, 116, 149, 65472, 1, 0, 2, 128, 0, 0, 0, 0, 0, 0, 0, 1, 381, 0, 118, 144, 0, 0, 0, 250, 0, 0, 0, 0, 0, 0, 0] @ 1032
Tag 0x0000: (0x0000) Short=[0, 0, 0, 0, 0, 0] @ 1100
Tag 0x0000: (0x0000) Short=[18, 0, 0, 1, 0, 0, 0, 0, 0] @ 1112
Tag 0x0012: (0x0012) Short=[1, 1, 2592, 1944, 1296, 242, 233, 44, 0, 0, 1, 0] @ 1130
Tag 0x0013: (0x0013) Short=[0, 0, 0, 0] @ 1154
ImageType: (0x0006) ASCII=IMG:PowerShot S2 IS JPEG @ 1162
FirmwareVersion: (0x0007) ASCII=Firmware Version 1.00 @ 1194
ImageNumber: (0x0008) Long=1434332 @ 808
OwnerName: (0x0009) ASCII=Michael Hamilton @ 1218
Tag 0x0010: (0x0010) Long=23330816 @ 832
Tag 0x000D: (0x000D) Long=[0, 1, 0, 124, 4294967278L, 4294967278L, 4294967293L, 0, 0, 0, 7, 10, 146, 137, 355, 10, 4294967289L, 136, 460, 0, 0, 0, 0, 0, 0, 0, 0, 0, 35, 4294967179L, 158, 0, 0, 74, 67, 74, 67, 1, 0, 4294967092L, 151, 0, 0, 1037, 1296, 4294967093L, 149, 68, 902, 1851, 1527, 902, 1, 576, 355, 113, 556, 262, 6, 0, 1, 0, 0, 0, 0, 2768, 1, 0, 0, 0, 0, 0, 0, 2288, 3388, 4528, 5588, 7160, 0, 1, 0, 1, 2772, 29, 5] @ 1250
Tag 0x0018: (0x0018) Byte=[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] @ 1590
Tag 0x0019: (0x0019) Short=1 @ 868
Tag 0x001A: (0x001A) Short=0 @ 880
Tag 0x001C: (0x001C) Short=0 @ 892
Tag 0x001D: (0x001D) Short=[32, 1, 0, 2, 2, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0] @ 1846
Tag 0x001E: (0x001E) Long=16778496 @ 916
SubMakerNote BitSet for MakerNote Tag 0x0001
Macromode: Normal
SelfTimer: 0
Quality: Superfine
FlashMode: Flash Not Fired
ContinuousDriveMode: Unknown
Unknown: 0
FocusMode: Single
Unknown: 65535
Unknown: 1
ImageSize: Large
EasyShootingMode: Manual
DigitalZoom: None
Contrast: Normal
Saturation: Normal
Sharpness: Normal
ISO: 100
MeteringMode: Evaluative
FocusType: Auto
AFPointSelected: Unknown
ExposureMode: Av-priority
Unknown: 32767
Unknown: 65535
LongFocalLengthOfLensInFocalUnits: 7200
ShortFocalLengthOfLensInFocalUnits: 600
FocalUnitsPerMM: 100
Unknown: 116
Unknown: 192
FlashActivity: Unknown
FlashDetails: Unknown
Unknown: 0
Unknown: 0
FocusMode: Single
Unknown: 0
Unknown: 2
Unknown: 0
Unknown: 2592
Unknown: 2592
Unknown: 0
Unknown: 0
Unknown: 0
Unknown: 0
Unknown: 32767
Unknown: 32767
Unknown: 1
Unknown: 1
SubMakerNote BitSet for MakerNote Tag 0x0004
Unknown: 0
Unknown: 160
Unknown: 37
Unknown: 116
Unknown: 149
Unknown: 65472
WhiteBalance: Sunny
Unknown: 0
SequenceNumber: 2
Unknown: 128
Unknown: 0
Unknown: 0
Unknown: 0
AFPointUsed: 0
FlashBias: 0 EV
Unknown: 0
Unknown: 0
Unknown: 1
SubjectDistance: 381
Unknown: 0
Unknown: 118
Unknown: 144
Unknown: 0
Unknown: 0
Unknown: 0
Unknown: 250
Unknown: 0
Unknown: 0
Unknown: 0
Unknown: 0
Unknown: 0
Unknown: 0
Unknown: 0
IFD 1 (Thumbnail) at offset 2228:
Compression: (0x0103) Short=JPEG Compressed @ 2238
XResolution: (0x011A) Ratio=180 @ 2306
YResolution: (0x011B) Ratio=180 @ 2314
ResolutionUnit: (0x0128) Short=Pixels/Inch @ 2274
JPEGInterchangeFormat: (0x0201) Long=5108 @ 2286
JPEGInterchangeFormatLength: (0x0202) Long=5006 @ 2298
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Old Mar 19, 2006, 2:21 PM   #24
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Mchnz-

Many thanks for the info. The EXIF data is all-encompassing and then some. Thanks again.
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Old Mar 29, 2006, 3:52 PM   #25
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Tullio wrote:
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Maybe I'll buy the S4 next year!
I'm with you....but I will probably wait for the s5.
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Old Apr 4, 2006, 9:20 PM   #26
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Here's a photo I took a few days ago of a migrating White Pelican at Lock and Dam 14 on the Mississippi River near Port Byron, IL. This species of pelican has a wing span of nine feet and weighs approximately 14 pounds (larger than a bald eagle). This photo, using my S2, is a max zoom of an eye-popping 48X (12X optical and 4X digital). I used the AE setting of a 4.0 aperture; the corresponding calculated shutter speed was one eight-hundredth of a second. My ISO was 200 (meant to use 50). Focusing this shot was extremely difficult because of the extreme focal length and the fact that the pelican was in flight at a very high rate of speed. I used the EVF to maximize camera stability. Also, it was a very overcast sky so thus the lack of good contrast. All in all I was flabbergasted just to capture this photo using such extreme magnification.
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Old Apr 5, 2006, 10:29 AM   #27
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I'm impressed, hawks1! This was indeed an excellent capture. I'm amazed by the quality of the digital zoom.I will now enable the digital zoom on my S2 and try it out. I've read time and time again that it is betternot to use the digitalzoom capability of any digicambut crop the image instead.I guess you just proved this statement to be inaccurate. Now, as far as focusing is concerned, if you set the camera's AF mode to Continuous, it should help you tremendously.
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