>> |
Anonymous File :-(, x)
>>33904
I'm sure there are plenty if you search with google. This one has to be good, it's long :D
http://www.kenrockwell.com/tech/filters.htm
and this has more pictures
http://www.parkcameras.com/article/mcs/art/54
The very basic reason is simple though, it is to alter the light entering the lens as not everything can be changed later with photoshop even when shooting digital. Polarising filters can control and reduce reflections. Neutral density filters can be used to control exposure. A 50% graduated filter can be used to balance a bright sky with a darker ground so neither is over or under exposed. Or play with the colours like I did here.
Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon PowerShot G3Maximum Lens Aperturef/2.8Sensing MethodOne-Chip Color AreaLens Size7.19 - 28.81 mmFirmware VersionFirmware Version 1.00Image-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution180 dpiVertical Resolution180 dpiImage Created2004:11:20 16:08:55Exposure Time1/25 secF-Numberf/8.0Lens Aperturef/8.0Exposure Bias0 EVFlashNo Flash, CompulsoryFocal Length20.69 mmColor Space InformationsRGBImage Width2272Image Height1704RenderingNormalExposure ModeManualScene Capture TypeStandardExposure ModeManualFocus TypeManualMetering ModeCenter-WeightedISO Speed Rating50SharpnessNormalSaturationNormalContrastNormalShooting ModeManualImage SizeLargeFocus ModeManualDrive ModeTimedFlash ModeOffCompression SettingSuperfineSelf-Timer Length2 secMacro ModeNormalSubject Distance65.530 mWhite BalanceAutoExposure Compensation3Sensor ISO Speed128Image Number133-3320
|