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nace186 · 03-31-2008, 08:01 PM

Hello everyone,

So I finally got the K200D and I took a couple of shots. In all of the pictures I notice, there's this dot located in the same position. It seems like it's dust, but I'm not sure.

Here's a photo with the red box highlight the dot.

http://img.photobucket.com/albums/v229/nace186/IMGP0009.jpg

and here's a 100% crop of the area where the dot is:

http://img.photobucket.com/albums/v229/nace186/untitled.jpg

Do you guys think this is a dust or is it something else?

Thanks.

thear · 03-31-2008, 08:05 PM

It's a defective pixel.

nace186 · 03-31-2008, 08:07 PM

ah I see, does Pentax cover this in the warranty or should I deal with it?

davemdsn · 03-31-2008, 08:15 PM

It is a hot/dead pixel and is common in digital sensors. They will come and go over the life of the camera. If you get one that is persistent then yes, it is covered under warranty. I have seen them on all of my DSLRs, but none were permanent. They may show up in the same place in a series of shots, but then are gone on the next series. Again, if you get one that doesn't go away and shows up in all your shots then get it serviced.

Peacekeeper · 03-31-2008, 08:51 PM

Thats why they invented cloning and healing tools in Photoshop

I have been lucky and never noticed them in my shots, then again maybe I just don't look either. Enjoy your new camera.

pentaxbling · 03-31-2008, 09:40 PM

I had a few dead pixels that showed up in every photo in the same spots on my K10D... Pentax mapped them out under warranty.

**LeoTaylor** · 04-01-2008, 01:26 PM

Originally posted by nace186

. In all of the pictures I notice, there's this dot located in the same position. It seems like it's dust, but I'm not sure.

As many have said you have a bad pixel. What they have not said is what a dust spot looks like. Dust causes is a large indistinct dark spot. The speck of dust on the sensor/filter is small but out of focus. Here is a before cleaning photo I took last year. Most of those spots were removed with a Giotto Rocket Blower I had just purchased.

Let's see, who can count the most dust spots. I can see eight in this highly compressed JPEG!

Attached Images

View Picture EXIF

Last edited by LeoTaylor; 04-01-2008 at 01:39 PM. Reason: spelling

Peter Zack · 04-01-2008, 02:14 PM

Leo that is one dirty sensor. I count 18 dust spots in total. some are very faint. If you want to check yourself. Take that image in the original full sized Jpeg and in any program increase the contrast really high. You'll see the faint ones much easier. The count is assuming the white surface you shot was clean.

The best way to see how clean the sensor is would be to shoot a bright blue sky with the lens wide open and focused at infinity, The take the image and add the contrast.

willis · 04-10-2008, 06:30 PM

Originally posted by LeoTaylor

As many have said you have a bad pixel. What they have not said is what a dust spot looks like. Dust causes is a large indistinct dark spot. The speck of dust on the sensor/filter is small but out of focus. Here is a before cleaning photo I took last year. Most of those spots were removed with a Giotto Rocket Blower I had just purchased.

Can these dust spots be removed with photoshop? Being a complete newb to my K10D, I was dumbfounded to already find what I think is a dust spot (to the upper right of the moon):

Is this dust and should I buy this rocket blower and use it, or wait until it gets worse?

Peter Zack · 04-10-2008, 10:10 PM

I'd order the rocket blower and until it arrives, use the clone tool to remove the dust spots from any images. Then anytime in the future, if there is any dust get out the blower.

Gimbal · 04-10-2008, 11:14 PM

Originally posted by Peter Zack

The best way to see how clean the sensor is would be to shoot a bright blue sky with the lens wide open and focused at infinity, The take the image and add the contrast.

In my experience the dust is seen a lot better if the lens is closed down. Wide open they might not show up at all.

Peter Zack · 04-10-2008, 11:39 PM

You're right. Duh moment...

willis · 04-11-2008, 04:47 AM

Originally posted by Peter Zack

I'd order the rocket blower and until it arrives, use the clone tool to remove the dust spots from any images. Then anytime in the future, if there is any dust get out the blower.

Sorry, is that something in Photoshop (which I do not yet have...)?

JMS · 04-11-2008, 05:22 AM

Originally posted by willis

Sorry, is that something in Photoshop (which I do not yet have...)?

Yes, but you can try this free Photoshop alternative:

GIMP - The GNU Image Manipulation Program

03-31-2008, 08:01 PM	#1
nace186 Inactive Account Join Date: Mar 2008 Posts: 9	Is this dust? Hello everyone, So I finally got the K200D and I took a couple of shots. In all of the pictures I notice, there's this dot located in the same position. It seems like it's dust, but I'm not sure. Here's a photo with the red box highlight the dot. http://img.photobucket.com/albums/v229/nace186/IMGP0009.jpg and here's a 100% crop of the area where the dot is: http://img.photobucket.com/albums/v229/nace186/untitled.jpg Do you guys think this is a dust or is it something else? Thanks.

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03-31-2008, 08:05 PM	#2
thear Forum Member Join Date: Jul 2007 Posts: 83	It's a defective pixel.

03-31-2008, 08:07 PM	#3
nace186 Inactive Account Join Date: Mar 2008 Posts: 9 Original Poster	ah I see, does Pentax cover this in the warranty or should I deal with it?

03-31-2008, 08:15 PM	#4
davemdsn Inactive Account Join Date: Oct 2006 Location: Boise, Idaho Photos: Gallery \| Albums Posts: 1,413	It is a hot/dead pixel and is common in digital sensors. They will come and go over the life of the camera. If you get one that is persistent then yes, it is covered under warranty. I have seen them on all of my DSLRs, but none were permanent. They may show up in the same place in a series of shots, but then are gone on the next series. Again, if you get one that doesn't go away and shows up in all your shots then get it serviced.

03-31-2008, 08:51 PM	#5
Peacekeeper Senior Member Join Date: Jul 2007 Location: Back at work :( Photos: Gallery Posts: 168	Thats why they invented cloning and healing tools in Photoshop I have been lucky and never noticed them in my shots, then again maybe I just don't look either. Enjoy your new camera.

03-31-2008, 09:40 PM	#6
pentaxbling Inactive Account Join Date: Jul 2007 Location: Virginia Posts: 141	I had a few dead pixels that showed up in every photo in the same spots on my K10D... Pentax mapped them out under warranty.

04-01-2008, 02:14 PM	#8
Peter Zack Pentaxian Moderator Emeritus Join Date: May 2007 Location: Edmonton Alberta, Canada Photos: Gallery \| Albums Posts: 10,643	Leo that is one dirty sensor. I count 18 dust spots in total. some are very faint. If you want to check yourself. Take that image in the original full sized Jpeg and in any program increase the contrast really high. You'll see the faint ones much easier. The count is assuming the white surface you shot was clean. The best way to see how clean the sensor is would be to shoot a bright blue sky with the lens wide open and focused at infinity, The take the image and add the contrast.

04-10-2008, 06:30 PM	#9
willis Junior Member Join Date: Mar 2008 Location: Va Posts: 37	Originally posted by LeoTaylor As many have said you have a bad pixel. What they have not said is what a dust spot looks like. Dust causes is a large indistinct dark spot. The speck of dust on the sensor/filter is small but out of focus. Here is a before cleaning photo I took last year. Most of those spots were removed with a Giotto Rocket Blower I had just purchased. Can these dust spots be removed with photoshop? Being a complete newb to my K10D, I was dumbfounded to already find what I think is a dust spot (to the upper right of the moon): Is this dust and should I buy this rocket blower and use it, or wait until it gets worse?

04-10-2008, 10:10 PM	#10
Peter Zack Pentaxian Moderator Emeritus Join Date: May 2007 Location: Edmonton Alberta, Canada Photos: Gallery \| Albums Posts: 10,643	I'd order the rocket blower and until it arrives, use the clone tool to remove the dust spots from any images. Then anytime in the future, if there is any dust get out the blower.

04-10-2008, 11:14 PM	#11
Gimbal Pentaxian Join Date: Apr 2007 Location: Sweden Posts: 2,106	Originally posted by Peter Zack The best way to see how clean the sensor is would be to shoot a bright blue sky with the lens wide open and focused at infinity, The take the image and add the contrast. In my experience the dust is seen a lot better if the lens is closed down. Wide open they might not show up at all.

04-10-2008, 11:39 PM	#12
Peter Zack Pentaxian Moderator Emeritus Join Date: May 2007 Location: Edmonton Alberta, Canada Photos: Gallery \| Albums Posts: 10,643	You're right. Duh moment...

04-11-2008, 04:47 AM	#13
willis Junior Member Join Date: Mar 2008 Location: Va Posts: 37	Originally posted by Peter Zack I'd order the rocket blower and until it arrives, use the clone tool to remove the dust spots from any images. Then anytime in the future, if there is any dust get out the blower. Sorry, is that something in Photoshop (which I do not yet have...)?

04-11-2008, 05:22 AM	#14
JMS Senior Member Join Date: Oct 2007 Location: Wisconsin Posts: 273	Originally posted by willis Sorry, is that something in Photoshop (which I do not yet have...)? Yes, but you can try this free Photoshop alternative: GIMP - The GNU Image Manipulation Program

Is this dust?

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