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Dirty Lens need help
Old 09-18-2006, 03:20 PM   #1 (permalink)
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I have tons of new pics,
Problem is I didnt notice that my lens had spots, I only viewed them trough the lcd to ensure proper exposure etc.. then dumped them.
Can you batch a command for something like "Healing" or "Magic Patch" so that on every pic it fixes each one?
All of the spots are in the same place on ALL shots.
"Note to self, Always/ALWAYS check lens before each new set!"
Theres over 3 Gigs, I am in a pinch!
I use CS2
Thanks guys,
Nick

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Re: Dirty Lens need help
Old 09-18-2006, 03:24 PM   #2 (permalink)
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The problem is probably not the lens, but rather dust spots on the sensor. So you likely need to clean that area.
Cheers,
rfs
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Re: Dirty Lens need help
Old 09-18-2006, 03:44 PM   #3 (permalink)
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Fredrick,
Thanks for the quick response, I viewed some pics from the begining of the day and they dont show, After your post I checked out the Lens and theres grease spots.
Then I remembered that my girls didnt put any sunscreen on (In the Dessert.Hello?)
I had some of that spray sunblock on and it misted on the camera.
With me getting up and down I picked up quite a bit of dirt and dust.

Dust & oil=Bad mix

Am I out of luck and have to shop each one individually?
Thanks again.
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Re: Dirty Lens need help
Old 09-18-2006, 04:20 PM   #4 (permalink)
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Still the sencor the lens can be remarkably dirty and still not show on a shot although get rubbish on the rear element and you will see the blemishes.
A friend of mine has a 600mm prime with a chunk out of the front element and it does not show in his shots exept in to the sun.
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Re: Dirty Lens need help
Old 09-18-2006, 04:37 PM   #5 (permalink)
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I can't help you with the processing of all of your images, but it does look to me that the spot is different in these images in how it appears in the image. To check whether it is the lens or sensor--do a controlled test shot with two different lenses....if the spot is there, then it is the sensor. I think you mentioned though, that you found it to be sunscreen....with I could help with the CS2 instant fix....
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Re: Dirty Lens need help
Old 09-18-2006, 05:01 PM   #6 (permalink)
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I remember reading about a technique for removing sensor (or lens) dust, but I can't find the back issue of the magazine that had the article. What the article said was to NOT clean the camera, but to first shoot a 100% white frame (they said to shoot a cloudless sky and overexpose an image) so you can have an image that shows all the dust on your sensor. From there I can't remember exactly what they did ... but maybe someone else remembers the article and can help you out.
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Re: Dirty Lens need help
Old 09-18-2006, 05:41 PM   #7 (permalink)
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I would still check to make sure. At least one of the spots looks just like sensor dust rather than something on the lens. To test, shoot a clear sky at f22 with several of your lens. Then see if you see the same spot showing up in each of them.
Cheers,
rfs
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Re: Dirty Lens need help
Old 09-19-2006, 04:07 PM   #8 (permalink)
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Whar RF said
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Re: Dirty Lens need help
Old 09-19-2006, 09:05 PM   #9 (permalink)
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I'm not aware of a way to fix them all at once but you can write an action that will fix groups of similar shots. Open one of the images and start recording.

1) duplicate image
2) use freehand lasso tool to select the desired spots
3) expand selection by a few pixels
4) feather selection by the same amount
5) create mask on duplicated layer

You should now have a mostly black mask with your selected areas in white. If not then invert it.

6) click on duplicate layer inside of layers pallet
7) select all
8) use "move" tool to slide the layer around until you have gotten rid of the bad spots

If the spots are in the sky you should probably move sideways to maintain the tonality of the natural gradient.

9) flatten image

I would advise setting the batch control panel in a way that each image is saved as a new file when you run the batch. That way if the correction does not work on a particular image you will still have the original.

Email me if you need further explanation.

Thanks, David
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Re: Dirty Lens need help
Old 09-19-2006, 10:49 PM   #10 (permalink)
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Thanks guys, I really appreciate it.

I also noticed that the glass on the front of the lens has something that looks like a teeny bread crumb to be specific. I took some pics today, I will try a diff lens cause some spots are still there (Not all of them)

Thanks again,
Nick
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