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Anonymous
Hey /p/

I've got a 400D and recently I've started to notice significant amounts of marks on my photos. I can only assume its sensor dust.

They always appear in the same place and it seems pretty severe.

I live in the UK, so what I want to know is if any shops like Jessops clean sensors? and for how much?

So much for the built in sensor cleaner.
Pic very related.
EXIF data available. Clickhereto show/hide.
Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon EOS 400D DIGITALCamera SoftwareAdobe Photoshop CS WindowsImage-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution72 dpiVertical Resolution72 dpiImage Created2008:10:02 17:25:41White Point Chromaticity0.3Exposure Time1/320 secF-Numberf/25.0Exposure ProgramManualISO Speed Rating100Lens Aperturef/25.0Exposure Bias0 EVMetering ModeAverageFlashNo Flash, CompulsoryFocal Length38.00 mmColor Space InformationUncalibratedImage Width1000Image Height667RenderingNormalExposure ModeManualWhite BalanceManualScene Capture TypeStandard
>> Anonymous
Try using a blower first, maybe it'll be enough.

Also, avoid f/25.
>> Anonymous
     File :-(, x)
^ as he said.

as with f/25 it could also be dust on the lens.
>> Anonymous
I like f/25 :(

any way to discern whether its lens dust or sensor dust?
>> Anonymous
for a quick check try to set it to f3.5 (or lower if possible) and look if it disappears.
>> Anonymous
     File :-(, x)
Quick shot out my window. I can't personally see anything.

What does this mean for me /p/?

Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon EOS 400D DIGITALCamera SoftwareAdobe Photoshop CS2 WindowsImage-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution72 dpiVertical Resolution72 dpiImage Created2008:10:02 18:12:43White Point Chromaticity0.3Exposure Time1/4000 secF-Numberf/2.8Exposure ProgramManualISO Speed Rating100Lens Aperturef/2.8Exposure Bias0 EVMetering ModeAverageFlashNo Flash, CompulsoryFocal Length28.00 mmColor Space InformationUncalibratedImage Width1200Image Height800RenderingNormalExposure ModeManualWhite BalanceAutoScene Capture TypeStandard
>> Anonymous
there may be dust on your lens - clean it!
>> Anonymous
who cares.. your pictures suck anyway.
>> Anonymous
>>267558

these are meant to demonstrate the dust. fuck you.
>> tizzou !!HuouSd+PYUs
How to check for sensor dust:
1)Put the lens with the widest aperutre you own on your camera.
2) Set it to the widest aperture.
3)Set it to about 1/2 sec shutter speed
4)manually set the focus distance to infinity.
5)open up a WHITE document of somesort on your computer
6)point camera at screen and take picture while moving the camera

POST PROCESSING:
1)Adjust the whitebalance
2)Increase the contrast
3)mess around basically so you can see the dust.
>> Anonymous
>>267561

Awesome, thanks a lot. I'll look into it.
>> Butterfly !xlgRMYva6s
>>267561
You shouldnt even need to set the WB, i can easily see what sensor crap i have (loads, i forgot how to mirror lockup) by exposing at f22 at a plane wall.
>> Anonymous
     File :-(, x)
OP here, so I tested it out properly.

Needless to say: "Fuck."

The camera technicians at my college may clean it for me, they have to do it periodically with all the 350D's they stock there.

Camera-Specific Properties:Equipment MakeCanonCamera ModelCanon EOS 400D DIGITALCamera SoftwareAdobe Photoshop CS2 WindowsImage-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution72 dpiVertical Resolution72 dpiImage Created2008:10:02 22:48:33White Point Chromaticity0.3Exposure Time1/6 secF-Numberf/32.0Exposure ProgramManualISO Speed Rating100Lens Aperturef/32.0Exposure Bias0 EVMetering ModeAverageFlashFlash, CompulsoryFocal Length70.00 mmColor Space InformationUncalibratedImage Width1200Image Height800RenderingNormalExposure ModeManualWhite BalanceAutoScene Capture TypeStandard
>> Anonymous
>>267733
lol thats not bad at all, I shoot with way more dust on my sensor all the time.

Then again I RARELY go past f8, so it almost never shows up
>> Anonymous
>>267739

Really? I don't NORMALLY shoot with high apertures but lately I've been experimenting with long exposure shit and thats when I began to notice this.
>> Martin !!ve2Q1ETWmJH
     File :-(, x)
Fuck yeah, Dust!

Camera-Specific Properties:Equipment MakeNIKON CORPORATIONCamera ModelNIKON D80Camera SoftwareAdobe Photoshop CS3 WindowsMaximum Lens Aperturef/3.5Sensing MethodOne-Chip Color AreaColor Filter Array Pattern834Focal Length (35mm Equiv)27 mmImage-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution300 dpiVertical Resolution300 dpiImage Created2008:10:02 23:01:03Exposure Time1/2 secF-Numberf/22.0Exposure ProgramManualISO Speed Rating200Exposure Bias0 EVMetering ModePatternLight SourceUnknownFlashNo FlashFocal Length18.00 mmColor Space InformationsRGBImage Width1000Image Height669RenderingNormalExposure ModeManualWhite BalanceAutoScene Capture TypeStandardGain ControlNoneContrastHardSaturationHighSharpnessHardSubject Distance RangeUnknown
>> Anonymous
Shooting the clear blue sky (no, not the sun) at your highest aperture is a somewhat traditional way to check as well.

You don't even have to overexpose it, just get a good, bright exposure and all the dust and whatnot will appear.