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Sensor Dust - A Screener Request

Granite From United Kingdom (Scotland), joined May 1999, 5345 posts, RR: 72
Posted (5 years 22 hours ago) and read 2638 times:

AIRLINERS.NET CREW
PHOTO SCREENER

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

Airliners.net

20 replies: All unread, jump to last

Mirage From Portugal, joined May 1999, 3078 posts, RR: 20
Reply 1, posted (5 years 22 hours ago) and read 2585 times:

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

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

Luis

Granite From United Kingdom (Scotland), joined May 1999, 5345 posts, RR: 72
Reply 2, posted (5 years 21 hours ago) and read 2566 times:

AIRLINERS.NET CREW
PHOTO SCREENER

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

Airliners.net

Sulman From United Kingdom, joined Mar 2004, 1936 posts, RR: 41
Reply 3, posted (5 years 21 hours ago) and read 2558 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

more like polishmig29s.net am I rite

Granite From United Kingdom (Scotland), joined May 1999, 5345 posts, RR: 72
Reply 4, posted (5 years 21 hours ago) and read 2550 times:

AIRLINERS.NET CREW
PHOTO SCREENER

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

Airliners.net

Kaddyuk From Wallis And Futuna Islands, joined Nov 2001, 4125 posts, RR: 36
Reply 5, posted (5 years 20 hours ago) and read 2508 times:

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

Whoever said "laughter is the best medicine" never had Gonorrhea

JeffM From United States, joined May 2005, 3217 posts, RR: 55
Reply 6, posted (5 years 18 hours ago) and read 2465 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.

Woody001 From United Kingdom (England), joined Feb 2004, 529 posts, RR: 30
Reply 7, posted (5 years 18 hours ago) and read 2444 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.

If I could just get the afterburner working...

Beechcraft From Germany, joined Nov 2003, 795 posts, RR: 45
Reply 8, posted (5 years 16 hours ago) and read 2398 times:

AIRLINERS.NET CREW
PHOTO SCREENER

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

That's it! You people have stood in my way long enough. I'm going to clown college!

2912n From United States, joined Oct 2001, 2013 posts, RR: 10
Reply 9, posted (5 years 13 hours ago) and read 2357 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.

Lennymuir From United Kingdom (Scotland), joined Oct 2002, 418 posts, RR: 8
Reply 10, posted (5 years 9 hours ago) and read 2299 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

Cloudburst Flight

Granite From United Kingdom (Scotland), joined May 1999, 5345 posts, RR: 72
Reply 11, posted (5 years ago) and read 2236 times:

AIRLINERS.NET CREW
PHOTO SCREENER

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

Airliners.net

Granite From United Kingdom (Scotland), joined May 1999, 5345 posts, RR: 72
Reply 12, posted (5 years ago) and read 2232 times:

AIRLINERS.NET CREW
PHOTO SCREENER

Gerry

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

Cheers

Gary

Airliners.net

Karlok From Netherlands, joined Mar 2002, 838 posts, RR: 3
Reply 13, posted (4 years 12 months 4 days 15 hours ago) and read 2180 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.

Donder10 From Canada, joined Oct 2001, 6654 posts, RR: 25
Reply 14, posted (4 years 12 months 4 days 14 hours ago) and read 2166 times:

Gary,
do you have the URL for speckgrabber?

Qantas744 From United Kingdom, joined May 2004, 237 posts, RR: 7
Reply 15, posted (4 years 12 months 4 days 14 hours ago) and read 2155 times:

Support Airliners.net - become a First Class Member!

This might help Alex:

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

Matt

you can't buy time but you can sell your soul and the closest thing to heaven is to rock'n'roll

Concord977 From United States, joined Jan 2004, 1255 posts, RR: 43
Reply 16, posted (4 years 12 months 4 days 13 hours ago) and read 2136 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?

Proudly, A.net's most unviewed profile.

Lorm From United States, joined Jun 2004, 384 posts, RR: 1
Reply 17, posted (4 years 12 months 2 days 21 hours ago) and read 2015 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?

Brick Windows

Granite From United Kingdom (Scotland), joined May 1999, 5345 posts, RR: 72
Reply 18, posted (4 years 12 months 2 days 21 hours ago) and read 2011 times:

AIRLINERS.NET CREW
PHOTO SCREENER

Lorm

That may be lens flare.

Would need to see some samples.

Cheers

Gary

Airliners.net

Lorm From United States, joined Jun 2004, 384 posts, RR: 1
Reply 19, posted (4 years 12 months 2 days 7 hours ago) and read 1933 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]

Brick Windows

Granite From United Kingdom (Scotland), joined May 1999, 5345 posts, RR: 72
Reply 20, posted (4 years 12 months 2 days 3 hours ago) and read 1924 times:

AIRLINERS.NET CREW
PHOTO SCREENER

Lorm

Possibly a 'hotspot'

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

Regards

Gary

Airliners.net

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