tallmanirl
Posts: 298
Location: Ireland
Registered: 5 Jun 2008
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How To Clean Sensor Dust From Blue Skies?
Posted: 24 Jan 2013 at 15:59 GMT
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I have a bit of sensor dust. How do I clean it using Photoshop CS5? Usually, when I try the clone, patch or healing brush tools, I can't get them to match the exact colour the sky should be. They either leave a border mark or make a bigger spot than the original. Any ideas?
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DemonDuck
Posts: 418
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Registered: 10 Mar 2011
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 24 Jan 2013 at 17:58 GMT
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tallmanirl said: I have a bit of sensor dust. How do I clean it using Photoshop CS5? Usually, when I try the clone, patch or healing brush tools, I can't get them to match the exact colour the sky should be. They either leave a border mark or make a bigger spot than the original. Any ideas?
Smallest possible brush -- sample from right next to the spot. Usually Lightroom will place the sample area in the best possible spot.
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Bob Stone
Posts: 359
Location: Rochester, NY, United States
Registered: 20 Oct 2007
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 24 Jan 2013 at 19:08 GMT
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If using Photoshop use the "Healing" tool and like DD says, take your sample as close to the spot as possible. Also make sure you are in "Normal" mode, not "Replace".
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John Houghton
Posts: 3722
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 24 Jan 2013 at 19:52 GMT
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I always use the spot healing brush for small dust spots. It works well for me.
John
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tallmanirl
Posts: 298
Location: Ireland
Registered: 5 Jun 2008
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 26 Jan 2013 at 19:52 GMT
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Thanks as always guys!
Will do!
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DemonDuck
Posts: 418
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Registered: 10 Mar 2011
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 26 Jan 2013 at 23:13 GMT
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The way I think about it (maybe right -- maybe wrong) is that the sky is similar shade and lightness in a circle through the spot that is centered on the Sun.
That works for me most of the time. Like if there is a spot in a break in the clouds or foreground that needs patching and there's not much room adjacent to the spot, then imagine a circle around the Sun, through the spot and place your source on that circle.
Not fool proof by any means but it's a starting point....
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iam360Texas
Posts: 313
Location: Fort Worth, Texas, United States
Registered: 12 Jul 2006
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 27 Jan 2013 at 18:55 GMT
updated: 27 Jan 2013 at 18:59 GMT
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A Canon Rep at our local camera shop showed me how to remove dust bunnies from our sensor.
Using a normal lens.. go outside and point the lens up to the sky and zoom in so the blue sky fills the frame.
Take a photo.
Open Photoshop... import that sky image and mouse move around and look for dark spots [sensor dust bunnies]. Make note of the bunnies position. Meaning remember the spots position ... then take the lens off the camera.. and use a bulb blower while lens mount pointed DOWN make a few puffs of air around where you remember the dust position and the bunnies should fall out and not be just blown around inside the lens hole.
Remount the lens. repeat taking another photo until all the loose bunnies are gone. If bunnies remain... then it might be time to have a proficient person do a sensor cleaning.
In photoshop cs6.. the patch tool is a good one because once you select the mark to be removed.. the process will [so they say] with content aware sample from multiple adjacent areas there by averaging the blended patch.
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DemonDuck
Posts: 418
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Registered: 10 Mar 2011
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 28 Jan 2013 at 10:12 GMT
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iam360Texas said: A Canon Rep at our local camera shop showed me how to remove dust bunnies from our sensor.
Using a normal lens.. go outside and point the lens up to the sky and zoom in so the blue sky fills the frame.
Take a photo.
Open Photoshop... import that sky image and mouse move around and look for dark spots [sensor dust bunnies]. Make note of the bunnies position. Meaning remember the spots position ... then take the lens off the camera.. and use a bulb blower while lens mount pointed DOWN make a few puffs of air around where you remember the dust position and the bunnies should fall out and not be just blown around inside the lens hole.
Remount the lens. repeat taking another photo until all the loose bunnies are gone. If bunnies remain... then it might be time to have a proficient person do a sensor cleaning.
In photoshop cs6.. the patch tool is a good one because once you select the mark to be removed.. the process will [so they say] with content aware sample from multiple adjacent areas there by averaging the blended patch.
There are sensor cleaning kits available but the idea of actually touching the sensor with anything scares the poop out of me.
Also, there are cans of (some kind of) dry pressurized gas that you can use to blow the dust off. They are pretty effective and pretty safe and a bit more powerful than the squeeze thingy. I use one to blow the dust off the sensor when I change lenses. Which I do as infrequently as possible.
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John Houghton
Posts: 3722
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 28 Jan 2013 at 19:27 GMT
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DemonDuck said: ...the idea of actually touching the sensor with anything scares the poop out of me.
I use a Visible Dust brush and haven't had any problems arising from this. There's good advice on the FAQ page at www.visibledust.com .
John
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DennisS
Posts: 1640
Location: Los Anglels, United States
Registered: 1 Sep 2007
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Re: How To Clean Sensor Dust From Blue Skies?
Posted: 28 Jan 2013 at 22:29 GMT
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but the idea of actually touching the sensor with anything scares the poop out of me I thought that at first. When a sensor cleaning is $75 or so, a sensor cleaning kit started looking good.
I clean my sensor (acutally the low pass filter in front of the sensor) all the time. Lately a air blower does the job just fine. No need for a wet cleaning.
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