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Topic: Sensor Dust - A Screener Request
Username: Granite
Posted 2004-07-09 14:17:03 and read 7637 times.

Hi all

With all the new crop of digitals going around more and more images are being uploaded with sensor dust/spots visible.

While this may have not been a major problem in the past, it is now and the BADDIRTY rejection reason will come into play more often.

If anyone get's this rejection reason, please don't rant and rave. It's a friendly warning from your screener to say your sensor needs cleaning.

There have already been discussions on this forum on how to detect the spots.

Being a screener for about 5 years now, I can spot them straight away so none will get past me  Wink/being sarcastic

So..........before you upload, check the image for spots in blue skies and even cloudy ones, depending on contrast.

Any questions, just ask.

Cheers

Gary

Topic: RE: Sensor Dust - A Screener Request
Username: Mirage
Posted 2004-07-09 14:23:17 and read 7584 times.

Can you make that text an email to be send to all photographers?

We know this forum is not visited by all...

Luis

Topic: RE: Sensor Dust - A Screener Request
Username: Granite
Posted 2004-07-09 14:38:10 and read 7565 times.

Luis

A good idea and I will have to pass on to Johan to see if he can mail all.....thanks.

On a separate note, I supply aviation images to a professional agency and have been instructed by them to ensure that all sensor spots are erradicated before being passed on to the customer.

Cheers

Gary

Topic: RE: Sensor Dust - A Screener Request
Username: Sulman
Posted 2004-07-09 14:41:49 and read 7557 times.

Gary,

Quick question. Are dust spots always semi-transparent, with a 'circular' appearance?

Reason I ask is that I think I've been eradicating little birdies from my images..whereas I only have one speck of dust in the bottom left that I'm actually aware of...

Cheers

James

Topic: RE: Sensor Dust - A Screener Request
Username: Granite
Posted 2004-07-09 14:51:11 and read 7549 times.

James

Yep, you are correct.

I've mentioned this a million times, invest in a Speckgrabber. One of the cheapest, most valuable items you can have in your camera bag.

Cheers

Gary

Topic: RE: Sensor Dust - A Screener Request
Username: Kaddyuk
Posted 2004-07-09 15:58:08 and read 7507 times.

I have had one or two of these and now am more aware of them in my pictures  Smile

Topic: RE: Sensor Dust - A Screener Request
Username: JeffM
Posted 2004-07-09 17:46:06 and read 7464 times.

To find your dust, just open an image and click Image>Auto Levels. Most of the time doing that will show you some hidden dust you did not know was there. Inversing the image and then doing the Auto Levels will also show you some hard to find dust.

Topic: RE: Sensor Dust - A Screener Request
Username: Woody001
Posted 2004-07-09 18:07:05 and read 7443 times.

Gary,
I cleaned my sensor last weekend before a visit to Old Warden, they're in the queue, makes processing images so much quicker. It's surprising just how quick dust builds up on the sensor and I'm a fussy bugg@r when it comes to changing lenses  Smile

I tend to let it build up to a certain level and then clean it.

I agree with the e-mail idea.

Ian.

Topic: RE: Sensor Dust - A Screener Request
Username: Beechcraft
Posted 2004-07-09 20:16:21 and read 7397 times.

Hey Gary,
i guess you did a lot of screening from my last upload.  Smile/happy/getting dizzy
My first with my D70, I´ll be more aware of those dust spots from now on....

best regards, Denis

Topic: RE: Sensor Dust - A Screener Request
Username: 2912n
Posted 2004-07-09 22:30:44 and read 7356 times.

In response to a question above about how they appear...Yes, they usually appear as a spot, almost translucent. However you might get a fiber or hair in there that will look like a squigly line.

Topic: RE: Sensor Dust - A Screener Request
Username: Lennymuir
Posted 2004-07-10 02:35:37 and read 7298 times.

Gary

I presume to you can differnetiate between sensor dust and the Scottish midgie!
Midgies tend to be darker and smaller on the photograph.
Unavoidable when shooting in over grass or within the vicinity of trees after rainfall.

Midgie = a very small fly, like a mosquito, but much more annoying!

Gerry

Topic: RE: Sensor Dust - A Screener Request
Username: Granite
Posted 2004-07-10 12:22:17 and read 7235 times.

Hi all

A link to some more info on sensor cleaning:

http://www.luminous-landscape.com/essays/sensor-cleaning.shtml

Thanks to Yvan for his e-mail.

Cheers

Gary

Topic: RE: Sensor Dust - A Screener Request
Username: Granite
Posted 2004-07-10 12:24:23 and read 7231 times.

Gerry

No real problem with Midgies at ABZ..........only sheep and wasps  Smile

Cheers

Gary

Topic: RE: Sensor Dust - A Screener Request
Username: Karlok
Posted 2004-07-10 21:00:10 and read 7179 times.

Instead of email every photographer it is also possible to ammend the rejection text. or just add the text like

"If you use a digital SLR, you should check your sensor from any dust. But be aware with it, it's sensitive and expensive. Airliners.net is not responsible for any damage."

Just an ide.a.

Topic: RE: Sensor Dust - A Screener Request
Username: Donder10
Posted 2004-07-10 21:50:05 and read 7165 times.

Gary,
do you have the URL for speckgrabber?

Topic: RE: Sensor Dust - A Screener Request
Username: Qantas744
Posted 2004-07-10 22:23:19 and read 7154 times.

This might help Alex:

http://www.airliners.net/discussions/aviation_photography/read.main/92746




Matt

Topic: RE: Sensor Dust - A Screener Request
Username: Concord977
Posted 2004-07-10 23:13:39 and read 7135 times.

I am sure I have a dusty CCD problem with my D100. I found a source for speckgrabber locally. But is this something I can do myself?

Topic: RE: Sensor Dust - A Screener Request
Username: Lorm
Posted 2004-07-12 15:09:33 and read 7014 times.

Kinda new here myself with higher end digital cams, and I'm not sure it's sensor dust but in some photos on A.net there are small circles that are bluish or sometimes violet specs. Is this CCD dust or a problem with the sensor itself?

Topic: RE: Sensor Dust - A Screener Request
Username: Granite
Posted 2004-07-12 15:18:59 and read 7010 times.

Lorm

That may be lens flare.

Would need to see some samples.

Cheers

Gary

Topic: RE: Sensor Dust - A Screener Request
Username: Lorm
Posted 2004-07-13 05:09:46 and read 6932 times.

Granite/Gary,

Okay this is a tough one because its one
of my favorite images from my home
airport. It's actually a green spec this
time. But in images I less remember they
appear blue or violet.

Center frame lower half of the image is
a green spec. It looks digital and not
part of environmental conditions.


View Large View Medium

Photo © Ray Harvey



Edit: Actually if you go Normal View Large Size mode when looking at the image it lines up vertically with the "F" in Fit Screen from "[Medium Large Fit Screen]"

[Edited 2004-07-13 05:19:07]

Topic: RE: Sensor Dust - A Screener Request
Username: Granite
Posted 2004-07-13 09:00:48 and read 6923 times.

Lorm

Possibly a 'hotspot'

This can easily be cloned out with Photoshop but I cannot see it as being a problem.

Regards

Gary


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