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Using exif information - UglyNRude - 02-27-2009

First let me say I am posting this as a request from Cassiel

Most of the new digital cameras have something called exif information. you can look at this information and see what settings were used. Most photo programs allow you to see this information. Just use view image information. XP and Vista allow you to view basic exif information by right clicking and selecting properties. Here is a free Exif program.

Digital cameras save JPEG (.jpg) files with EXIF (Exchangeable Image File) data. Camera settings and scene information are recorded by the camera into the image file. (some use RAW but that is another article)

Examples of stored information are shutter speed, date and time, focal length, exposure compensation, metering pattern and if a flash was used.
Use EXIF as a learning tool

Many camera owners study EXIF to compare successful photos to those that are not. Data provides insight about how camera settings affect photo characteristics such as exposure, depth-of-field and subject movement.

EXIF is read by applications that support JPEGs. They include web browsers, image editing and organizing programs and some printer drivers. The printer drivers use the information to automatically enhance images, which can result in a better looking prints.

Preserving EXIF information

If an edited image is saved correctly to preserve EXIF data, the information can be viewed online at photo hosting sites. Some photo hosting sites, such as Flickr, use the word "properties" instead of EXIF.

Ok now I will say all cameras respond a little differently to adjustments but for basic night photo's I recommend changing your ISO settings to at the lowest 400. if your using a higher mega pixel 8 or higher then switch to 800 or higher. You need to remember the higher the iso the more grains will be in the picture, but at the same time the higher the iso the more light it lets in. I also recommend switching your camera to manual, this eliminates a lens constant movement trying to lock on.

For daytime photography drop your iso settings to 100 to 200 for crisp clear pictures. For the average person I would run automatic focus and white balance.

This is just basic information. If you want to learn more the information is out there.

I might also add the farther your flash is from your lens, the less moisture or dust orbs you will see. Some cameras have eliminated orbs from showing up by using this method.

This is what an exif file looks like
Filename : 2008_0615picssaved0034.JPG
JFIF_APP1 : Exif
Main Information
Model : FinePix S9000
Orientation : left-hand side
XResolution : 72/1
YResolution : 72/1
ResolutionUnit : Inch
Software : Digital Camera FinePix S9000 Ver1.02
DateTime : 2008:06:15 20:24:45
YCbCrPositioning : co-sited
Copyright :
ExifInfoOffset : 294
PrintIM IFD : 28Bytes
Print Image Matching Info
Version : 0250
Unknown (0002) : 01 00 00 00
Unknown (0101) : 00 00 00 00
Sub Information
ExposureTime : 1/45Sec
FNumber : F3.1
ExposureProgram : Program Normal
ISOSpeedRatings : 400
ExifVersion : 0220
DateTimeOriginal : 2008:06:15 20:24:45
DateTimeDigitized : 2008:06:15 20:24:45
ComponentConfiguration : YCbCr
CompressedBitsPerPixel : 20/10 (bit/pixel)
ShutterSpeedValue : 1/45Sec
ApertureValue : F3.1
BrightnessValue : EV-6.9
ExposureBiasValue : EV0.0
MaxApertureValue : F2.8
MeteringMode : Division
LightSource : Unidentified
Flash : Fired(Auto)
FocalLength : 7.60(mm)
MakerNote : FUJIFILM Format : 310Bytes (Offset:892)
FlashPixVersion : 0100
ColorSpace : sRGB
ExifImageWidth : 2592
ExifImageHeight : 1944
ExifInteroperabilityOffset : 1194
FocalPlaneXResolution : 3331/1
FocalPlaneYResolution : 3331/1
FocalPlaneResolutionUnit : Centimeter
SensingMethod : OneChipColorArea sensor
FileSource : DSC
SceneType : A directly photographed image
CustomRendered : Normal process
ExposureMode : Auto
WhiteBalance : Auto
SceneCaptureType : Standard
Contrast : Hard
Saturation : High
Sharpness : Hard
SubjectDistanceRange : Unknown
Vendor Original Information
Version : 0130
Quality mode : NORMAL
Sharpness : HARD
White Balance : Auto
Color : HIGH
Unknown (1006)3,1 : 256
Flash mode : Auto
Flash strength : 67/100
Macro mode : Off
Focus mode : Manual Focus
Unknown (1022)3,1 : 0
Unknown (1023)3,2 : 0,0
SlowSync : Off
Mode : Program AE
Unknown (1032)3,1 : 1
Sequence Mode : Off
Unknown (1101)3,1 : 0
Unknown (1200)3,1 : 0
Unknown (1210)3,1 : 0
Blurring warning : No
Focus status : Nice
Exposure status : Nice
Unknown (1400)3,1 : 1
ExifR : R98
Version : 0100
Thumbnail Information
Compression : OLDJPEG
Orientation : left-hand side
XResolution : 72/1
YResolution : 72/1
ResolutionUnit : Inch
JPEGInterchangeFormat : 1342
JPEGInterchangeFormatLength : 10408
YCbCrPositioning : co-sited

RE: Using exif information - Skatha - 02-27-2009

Nice job Ugly. Smile I used to have that free EXIF program on my old laptop, but I never installed it on my current one that I bought last summer.

Correct me if I'm wrong, but isn't there also a line which will indicate whether or not a photo has been enhanced or otherwise modified by a photo editing program?

RE: Using exif information - UglyNRude - 02-27-2009

Yes it will say modified yes or no
But there are programs that will allow you to change it and remove it. Its usually professionals who do this though.

RE: Using exif information - Skatha - 02-27-2009

Gotcha. Thanks! Smile