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Dust On The Sensor That Won't Come Off  
User currently offlineBA From United States of America, joined May 2000, 11154 posts, RR: 59
Posted (8 years 6 months 3 weeks 1 day 12 hours ago) and read 8131 times:

Well I have a piece of dust on the left side of the sensor on my 350D which won't go away. It shows up extremely dark and solid at f/22. At f/3.5, it is still visible, but more faint and spread out.

I can actually see this piece of dust with the naked eye if I look at it from the right angle and with enough light. Having tried several attempts to blow it away with a smaller rubber blower and even taking the risk of trying to brush it away with a piece of lens paper, it won't budge.

I took it to a local camera shop and the idiot used a kleenex that he had made slightly wet by dabbing it on his tongue. There is now a small smudge mark. I don't want to talk about this part of the story as it makes me really angry. The good news is he didn't damage or scratch the sensor. The smudge mark is very faint and doesn't seem to have any noticable affect on the photos. I've taken several shots at different light conditions, different aperatures, and different ISO settings to confirm this.

I currently do not have access to wet cleaning methods like the Eclipse fluids, so I will have to wait until I get back to the US to clean the smudge.

I am beginning to think that this piece of dust is actually sandwiched between the IR filter and the sensor. I obviously cannot do anything about this nor will I attempt to do anything.

Here is a shot of a white wall taken at f/22 and +2 exposure compensation:

http://mea707.lrehosting.com/sensor.jpg

You can clearly see the very dark spot on the left side. There are some faint spots on the corners, but these are not a problem as they are not showing up on wider aperatures.

What suggestions would you recommend I take? Should I ship it off to a Canon service center? The camera is still under warranty.

I won't be back in the US for another 3 weeks, so it looks like my shots for the next two weeks will have an annoying dot on the left side of every photo I take. I guess I can always crop part of the picture...

Any feedback would be greatly appreciated.


"Generosity is giving more than you can, and pride is taking less than you need." - Khalil Gibran
17 replies: All unread, jump to last
 
User currently offlineViv From Ireland, joined May 2005, 3142 posts, RR: 28
Reply 1, posted (8 years 6 months 3 weeks 1 day 11 hours ago) and read 8112 times:

Let Canon do it - although I doubt it will be covered by the warranty. In the meantime, you can easily clone out the spot.


Nikon D700, Nikkor 80-400, Fuji X Pro 1, Fujinon 35 f/1.4, Fujinon 18 f/2
User currently offlineSinkrate From Australia, joined Jan 2005, 336 posts, RR: 1
Reply 2, posted (8 years 6 months 3 weeks 1 day 11 hours ago) and read 8109 times:

Quoting BA (Thread starter):
I took it to a local camera shop and the idiot used a kleenex that he had made slightly wet by dabbing it on his tongue.

Yes, I would agree that he is an Idiot! I dont think dabbing a Kleenex on your tounge is a prefered way of cleaning a sensor sarcastic .

Michael


User currently offlineCxsjr From , joined Dec 1969, posts, RR:
Reply 3, posted (8 years 6 months 3 weeks 1 day 10 hours ago) and read 8093 times:

Quoting BA (Thread starter):
and the idiot used a kleenex that he had made slightly wet by dabbing it on his tongue

 box   arrow   tongue 

.... the guy is an absolute muppet and shouldn't be working in a camera store!

My advice with the type of spot you can see with the naked eye is to try a 'spec grabber' - probably only about $7 or $8 and available from any "good' camera store (not the one you went to first of all!).

A spec grabber is useful in limited situations but I find this is one of them. It's a small rubber tipped instrument which you just dab on the spot and it should pick it off.

Failing that ....

Quoting Viv (Reply 1):
Let Canon do it


User currently offlineBA From United States of America, joined May 2000, 11154 posts, RR: 59
Reply 4, posted (8 years 6 months 3 weeks 1 day 10 hours ago) and read 8085 times:

Thanks for all the feedback.

Quoting Sinkrate (Reply 2):
Yes, I would agree that he is an Idiot! I dont think dabbing a Kleenex on your tounge is a prefered way of cleaning a sensor .



Quoting Cxsjr (Reply 3):
.... the guy is an absolute muppet and shouldn't be working in a camera store!

You should have seen what he was about to do next. He was about to stick his finger and try to scratch it off with his fingernail before I yelled at him.

Just thinking about it makes my blood boil.  banghead 

I am so glad he did not damage it...

Quoting Cxsjr (Reply 3):
My advice with the type of spot you can see with the naked eye is to try a 'spec grabber' - probably only about $7 or $8 and available from any "good' camera store (not the one you went to first of all!).

I hope this works, but considering that his saliva on a piece of tissue didn't scootch it a tiny bit, I think it is more serious than simply a stubborn piece of dust on the surface of the filter that just won't budge.

I have heard that dust can get underneath the filter. If this is true, then I am going to be paranoid about EVER cleaning it again in the future...



"Generosity is giving more than you can, and pride is taking less than you need." - Khalil Gibran
User currently offlineF9Widebody From United States of America, joined Sep 2003, 1604 posts, RR: 10
Reply 5, posted (8 years 6 months 3 weeks 1 day 8 hours ago) and read 8068 times:

I would use the copper hill method. Has always worked wonders for me.

http://www.pbase.com/copperhill/ccd_cleaning

Works GREAT!

Some guy from Canon even contacted him to let him know of the merits of the system.

Regards



YES URLS in signature!!!
User currently offlineBigSkyBirds From , joined Dec 1969, posts, RR:
Reply 6, posted (8 years 6 months 3 weeks 1 day 6 hours ago) and read 8044 times:

A spec grabber may work for this but, I think its under the filter not on top. I had similar marks on a 30D that I returned. They proved to be under the filter.

regards

Kevin


User currently offlinePtrjong From Netherlands, joined Mar 2005, 4001 posts, RR: 18
Reply 7, posted (8 years 6 months 3 weeks 1 day 6 hours ago) and read 8037 times:

I'd like to buy this Copper Hill stuff.

I understand the difference between the Pro Kit and the Ultimate Kit is mainly the Anti-Static Brush which you can use on the road, is that right? Is that a good piece of kit too?

As a Dutch customer, do I order it online with http://chili-pix.ch/shop/?
Any experiences with them? Or is it available over the counter somewhere?

Thanks,

Peter



The only difference between me and a madman is that I am not mad (Salvador Dali)
User currently offlineBA From United States of America, joined May 2000, 11154 posts, RR: 59
Reply 8, posted (8 years 6 months 3 weeks 1 day 5 hours ago) and read 8026 times:

Quoting BigSkyBirds (Reply 6):
A spec grabber may work for this but, I think its under the filter not on top. I had similar marks on a 30D that I returned. They proved to be under the filter.

How does dust get blown underneath the filter? I thought it is supposed to be sealed well...



"Generosity is giving more than you can, and pride is taking less than you need." - Khalil Gibran
User currently offlineCxsjr From , joined Dec 1969, posts, RR:
Reply 9, posted (8 years 6 months 3 weeks 1 day 5 hours ago) and read 8023 times:

Quoting Ptrjong (Reply 7):
Any experiences with them?

Yes, I bought their kit last year; you have to pay with PayPal unless they've changed anything since then but I got the kit three days after ordering. It came from Switzerland I believe. Good stuff, slightly expensive for what you get and can be fiddly and time consuming but yes, good stuff and Chili-pix are fine in my experience.

Good luck!


User currently offlineBigSkyBirds From , joined Dec 1969, posts, RR:
Reply 10, posted (8 years 6 months 3 weeks 1 day 5 hours ago) and read 8020 times:

Quoting BA (Reply 8):
How does dust get blown underneath the filter? I thought it is supposed to be sealed well...

It may be during the manufacturing process or be a bad seal.

regards

Kevin


User currently offlineGary2880 From , joined Dec 1969, posts, RR:
Reply 11, posted (8 years 6 months 3 weeks 11 hours ago) and read 7961 times:

Quoting BA (Reply 4):
You should have seen what he was about to do next. He was about to stick his finger and try to scratch it off with his fingernail before I yelled at him.

Just thinking about it makes my blood boil.

I am so glad he did not damage it...

you should have let him

then when he did bugger it up, demand a new camera from the manager due to staff incompetence  Smile ''or ill see you on watchdog!''


User currently offlineOly720man From United Kingdom, joined May 2004, 6842 posts, RR: 11
Reply 12, posted (8 years 6 months 3 weeks 10 hours ago) and read 7959 times:

Not wishing to appear ignorant, but if the dust is on the sensor then will its appearance be the same regardless of aperture? (within sensible limits of under/over exposure)


wheat and dairy can screw up your brain
User currently offlinePtrjong From Netherlands, joined Mar 2005, 4001 posts, RR: 18
Reply 13, posted (8 years 6 months 3 weeks 10 hours ago) and read 7954 times:

Quoting Oly720man (Reply 12):
Not wishing to appear ignorant, but if the dust is on the sensor then will its appearance be the same regardless of aperture?

No, somehow the appearance of dust on your sensor does change with aperture.



The only difference between me and a madman is that I am not mad (Salvador Dali)
User currently offlinePtrjong From Netherlands, joined Mar 2005, 4001 posts, RR: 18
Reply 14, posted (8 years 6 months 1 week 1 day 9 hours ago) and read 7842 times:

Quoting Cxsjr (Reply 9):
Yes, I bought their kit last year; you have to pay with PayPal unless they've changed anything since then but I got the kit three days after ordering. It came from Switzerland I believe. Good stuff, slightly expensive for what you get and can be fiddly and time consuming but yes, good stuff and Chili-pix are fine in my experience.

Good luck!

Thanks Stuart.

My kit arrived today, also after three working days. The company seems reliable enough, and I think I'll get the hang of the cleaning.
The stuff is expensive, but it works out a lot cheaper than having my sensor cleaned at Inca in Haarlem for 35 euros - they don't even do a good job in my opinion.

Peter



The only difference between me and a madman is that I am not mad (Salvador Dali)
User currently offlineMaiznblu_757 From United States of America, joined Mar 2002, 5112 posts, RR: 50
Reply 15, posted (8 years 6 months 1 week 1 day 8 hours ago) and read 7834 times:

Quoting Ptrjong (Reply 7):
I'd like to buy this Copper Hill stuff.

I understand the difference between the Pro Kit and the Ultimate Kit is mainly the Anti-Static Brush which you can use on the road, is that right? Is that a good piece of kit too?

As a Dutch customer, do I order it online with http://chili-pix.ch/shop/?
Any experiences with them? Or is it available over the counter somewhere?

Thanks,

Peter

The Copper Hill method works awesomely and I highly recommend it. I have been using it since April 04. I am always amused at how scared people are about "touching the sensor". Yes, you need to be careful, but, its really not bad at all. After a few times you will get very comfortable with it.

Quoting Cxsjr (Reply 9):
.... slightly expensive for what you get and can be fiddly and time consuming but yes, good stuff and Chili-pix are fine in my experience.

Thats for sure... I just ordered a kit for my uncle and they raised the price SUBSTANTIALLY from 2004.


User currently offlineGlennstewart From Australia, joined Jun 2003, 1124 posts, RR: 54
Reply 16, posted (8 years 6 months 1 week 22 hours ago) and read 7795 times:

Quoting BA (Thread starter):
I took it to a local camera shop and the idiot used a kleenex that he had made slightly wet by dabbing it on his tongue.

Yep - the guy is a muppet (so far the best call of 2006).

Quoting BA (Thread starter):
What suggestions would you recommend I take? Should I ship it off to a Canon service center? The camera is still under warranty.

I smudged my own 30D sensor - quite badly.
I took it into Canon, and they cleaned it very well in 10 minutes on the spot and for free.

Best thing is.... if Canon bust it, they don't void their own warranty. Mr Muppet however would have not only stuffed the camera (if he'd tried harder), he would have void your warranty.



Glenn



Respected users.... If my replies are useful, then by all means...
User currently offlineBA From United States of America, joined May 2000, 11154 posts, RR: 59
Reply 17, posted (8 years 6 months 1 day 11 hours ago) and read 7731 times:

Quoting Glennstewart (Reply 16):
Best thing is.... if Canon bust it, they don't void their own warranty. Mr Muppet however would have not only stuffed the camera (if he'd tried harder), he would have void your warranty.

Yes, and the very thought of it makes me shiver.

I am back in the US now. I've taken over 100 pictures now with an annoying black dot appearing on the left side of every photo.

I'm going to have to mail it to Canon I believe as they only have 2 service centers in the US, one on the East Coast and one on the West Coast.



"Generosity is giving more than you can, and pride is taking less than you need." - Khalil Gibran
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