BA
Topic Author
Posts: 10166
Joined: Fri May 19, 2000 11:06 am

Dust On The Sensor That Won't Come Off

Wed May 31, 2006 10:09 pm

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
 
viv
Posts: 2953
Joined: Tue May 31, 2005 5:17 pm

RE: Dust On The Sensor That Won't Come Off

Wed May 31, 2006 10:55 pm

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
 
Sinkrate
Posts: 323
Joined: Mon Jan 31, 2005 7:52 pm

RE: Dust On The Sensor That Won't Come Off

Wed May 31, 2006 11:12 pm

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
 
cxsjr
Posts: 711
Joined: Tue Aug 24, 2004 3:44 am

RE: Dust On The Sensor That Won't Come Off

Wed May 31, 2006 11:44 pm

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
The world is a book, those who do not travel read only one page ....
 
BA
Topic Author
Posts: 10166
Joined: Fri May 19, 2000 11:06 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 12:03 am

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
 
F9Widebody
Posts: 1475
Joined: Thu Sep 18, 2003 5:47 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 1:46 am

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!!!
 
BigSkyBirds
Posts: 36
Joined: Tue May 17, 2005 8:03 pm

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 3:36 am

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 avatar
ptrjong
Posts: 4121
Joined: Wed Mar 02, 2005 9:38 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 3:46 am

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)
 
BA
Topic Author
Posts: 10166
Joined: Fri May 19, 2000 11:06 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 4:47 am

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
 
cxsjr
Posts: 711
Joined: Tue Aug 24, 2004 3:44 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 4:54 am

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!
The world is a book, those who do not travel read only one page ....
 
BigSkyBirds
Posts: 36
Joined: Tue May 17, 2005 8:03 pm

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 5:02 am

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
 
Gary2880
Posts: 1856
Joined: Wed Aug 18, 2004 8:52 pm

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 11:09 pm

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!''
Patriotism is the last refuge of the scoundrel :- Samuel Johnson
 
oly720man
Posts: 5761
Joined: Fri May 21, 2004 7:13 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 11:18 pm

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 avatar
ptrjong
Posts: 4121
Joined: Wed Mar 02, 2005 9:38 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 01, 2006 11:39 pm

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 avatar
ptrjong
Posts: 4121
Joined: Wed Mar 02, 2005 9:38 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 15, 2006 1:06 am

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)
 
maiznblu_757
Posts: 4952
Joined: Fri Mar 01, 2002 12:05 pm

RE: Dust On The Sensor That Won't Come Off

Thu Jun 15, 2006 1:38 am

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.
 
glennstewart
Posts: 952
Joined: Fri Jun 13, 2003 9:11 am

RE: Dust On The Sensor That Won't Come Off

Thu Jun 15, 2006 11:19 am

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...
 
BA
Topic Author
Posts: 10166
Joined: Fri May 19, 2000 11:06 am

RE: Dust On The Sensor That Won't Come Off

Wed Jun 21, 2006 11:03 pm

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

Who is online

Users browsing this forum: No registered users and 8 guests

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos