sllevin
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Sensor Defects On Canon Cameras

Fri Jul 08, 2005 2:17 am

Since I figure this is the largest grouping of Canon digital users I know...

I've played with three bodies recently. A slightly older (but in immaculate shape) 10D, a new-new 20D, and a Rebel XT that I myself took right out of the box new.

All three have significant, notable dust marks that appear to be on the inside of the sensor. The specks typically are only visible with an aperture smaller than 13 or so (I know, it's not hugely material for shooting airplanes, but I do a lot of landscape stuff as well).

I've had people tell me this is the norm, since Canon doesn't actually assemble the bodies in clean rooms.

And this is all on the inside of the sensor-glass -- cleaning the sensor (which was done on the 10D) made not one whit of difference. And the XT, I was increibly paranoid, and was uber-careful putting a lens on the body, walked outside, fired away -- and there they were.

So I'm trying to get a feel for others experiences, and if I should just accept it and figure that to get really perfect stuff I'll have to photoshop away the specks in every image.

I've returned the XT because I decided that the lens makes up enough of the bulk and I think I want to get a 20D.

Thanks!

Steve
 
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JeffM
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 2:28 am

Quoting Sllevin (Thread starter):
... should just accept it and figure that to get really perfect stuff I'll have to photoshop away the specks in every image

Accept it. I've got both Nikon and Canon digital bodies. Dust will invade both equally from my experience. I've yet to hear of anyone else mentioning dust 'built in' as you call it under the sensor filter. I also can't imagine why any manufacturer would bother with 'clean room' assembly on consumer grade cameras, or any other grade for that matter unless it was designed specifically for medical use.
 
fergulmcc
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 2:29 am

Or just do a sensor clean, get some swabs and the fluid and swipe away!

Welcome the the club of dust spots.

Fergul Big grin

PS, Get the 20D, I hope to in December.
Zambian Airways, Where the Eagles fly free!!
 
sfilipowicz
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 2:58 am

I bought my 20D a few weeks ago, new out of the box free with dustspots!  Sad
 
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JeffM
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 4:14 am

Quoting Fergulmcc (Reply 2):
Or just do a sensor clean, get some swabs and the fluid and swipe away!

He is describing dust under the anti-ailising filter that covers the sensor, not dust on top of it. You can't swab under it.
 
sllevin
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 5:22 am

Quoting JeffM (Reply 4):
He is describing dust under the anti-ailising filter that covers the sensor, not dust on top of it. You can't swab under it.

Exactly. I can accept having to clean it from time to time, but the XT was brand new in the box and had dust underneath where it was effectively "stuck."

Thanks!

Steve
 
fergulmcc
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 5:24 am

Quoting Sllevin (Reply 5):
He is describing dust under the anti-ailising filter that covers the sensor, not dust on top of it. You can't swab under it

Sorry my misunderstanding, been a long week.

Take care

Fergul  Smile
Zambian Airways, Where the Eagles fly free!!
 
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JeffM
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 6:22 am

Quoting Sllevin (Reply 5):
Exactly. I can accept having to clean it from time to time, but the XT was brand new in the box and had dust underneath where it was effectively "stuck."

Not sure where you purchased the camera Steve, but did you take a few test shots with it at the store? If not, how come? Would have saved you some grief I would imagine.
 
TACAA320
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 9:03 am

What is recommendable to do when clean them?
'Science without religion is lame, religion without science is blind'. Albert Einstein
 
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JeffM
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 9:32 am

Quoting TACAA320 (Reply 8):
What is recommendable to do when clean them?

Pec pads and Eclipse fluid is about the cheapest.
 
b757300
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 1:12 pm

Seems like a lot of people have said that their 20D came with factory installed dust. One of the main reasons I went with the 350D.

As my 350D, it came dust free. So far I haven't had any problems with dust spots in my pictures.
"There is no victory at bargain basement prices."
 
TACAA320
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 1:32 pm

"As my 350D, it came dust free. So far I haven't had any problems with dust spots in my pictures."[reply 10]

Amen.

Only sparkling clean pictures with my new D350. No spots at all.
'Science without religion is lame, religion without science is blind'. Albert Einstein
 
sllevin
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 1:34 pm

Quoting JeffM (Reply 7):
Not sure where you purchased the camera Steve, but did you take a few test shots with it at the store? If not, how come? Would have saved you some grief I would imagine.

I actually bought it from Amazon. I will admit to, despite the dust spots, taking it (and the 10-22mm EF-S lens) to the UK for two weeks. So it was worth the fairly simple hassle of returning it when I got home. And besides, in the UK, it's not like you get blue sky...  Smile  Smile  Smile

Steve
 
TACAA320
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 1:35 pm

"since Canon doesn't actually assemble the bodies in clean rooms."[original post].

May I ask how could you know that?
'Science without religion is lame, religion without science is blind'. Albert Einstein
 
Dehowie
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 2:40 pm

I am wondering what the big deal is with complaints about dust.
Given that at your very first lens change that dust will enter the area in question and cause issues what would you prefer.
A camera which comes with dust which you "ARE" going to have to learn to deal with or a camera which is untested by QC people.
Given it takes less than 5 minutes to do a dust clean using the proper technique whats the big deal?
Do you not clean the face of a new lens prior to use?
Cheers
Darren
2EOS1DX,EF14.2.8LII,17TS,85/1.2,16-35L,24-70LII,24L,70-200F2.8LII,100-400,300/400/500/800L
 
ChrisH
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 4:57 pm

Here's a cool method for cleaning your sensor:

http://fovea.perso.cegetel.net/IonizerE.htm

If anyone tries it, let us know how it works out =)
what seems to be the officer, problem?
 
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JeffM
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 10:47 pm

Quoting Dehowie (Reply 14):
Given it takes less than 5 minutes to do a dust clean using the proper technique whats the big deal?

Darren,
If you read his first remarks, the dust is under (according to him( the anti-ailising filter. You can't clean under it. Big difference.
 
fergulmcc
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RE: Sensor Defects On Canon Cameras

Fri Jul 08, 2005 11:10 pm

Quoting JeffM (Reply 16):
If you read his first remarks, the dust is under (according to him( the anti-ailising filter. You can't clean under it. Big difference.

Then Steve should take the camera back if he has bought one. How do you know that they are under the sensor Steve. Just asking here. Did you clean each sensor to ensure that it was infact under the glass. I have cleaned my sensor and when I do its spotless so no dust under my glass, thank God!
If it is a case that they are then they have to give you a new camera or replace the sensor. I haven't heard anyone with this problem of dust under the glass.

Take care

Fergul Big grin
Zambian Airways, Where the Eagles fly free!!
 
Dehowie
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RE: Sensor Defects On Canon Cameras

Sat Jul 09, 2005 10:02 am

G'day Jeff and Steve
Well if its inside the sensor the camera should go back for an exchange.
If the specks are only visible at F13 or greater it is quite possible that they are still external dustspots just not big enough to be seen easily bythe eye.
Are you using the cleaning technique using pecpads a swab and eclipse fluid?
If its definitely inside take it back with some good evidence(print) and demand in nice words an exchange as it sounds clearly like a defect if thats the case.
2EOS1DX,EF14.2.8LII,17TS,85/1.2,16-35L,24-70LII,24L,70-200F2.8LII,100-400,300/400/500/800L
 
sllevin
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RE: Sensor Defects On Canon Cameras

Tue Jul 12, 2005 10:20 am

Yes, we've done all the cleaning, several times, and the spots never ever change. Not one bit.

The feedback on not being assembled in clean rooms came from a Canon distributor.

My question was to see if this was as common as Canon was claiming; that essentially, it's only the rare body that does NOT have dust under the glass.

Steve
 
fergulmcc
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RE: Sensor Defects On Canon Cameras

Tue Jul 12, 2005 7:20 pm

Quoting Sllevin (Reply 19):
My question was to see if this was as common as Canon was claiming; that essentially, it's only the rare body that does NOT have dust under the glass.

I must have a rare one then, as I have done the sensor cleaning and can get my sensor completely spotless.
I will now do a more thorough check when I get my 20D body later in the year, and if there is dust under the sensor, it's going back!

Take care

Fergul Big grin  sun 
Zambian Airways, Where the Eagles fly free!!
 
wietse
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RE: Sensor Defects On Canon Cameras

Tue Jul 12, 2005 8:24 pm

Quoting Fergulmcc (Reply 20):
I must have a rare one then, as I have done the sensor cleaning and can get my sensor completely spotless.

Me too...

With both of my Canon DSLRs there was no dust behind the filter and one swipe will straighten it out perfectly
Wietse de Graaf
 
TACAA320
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RE: Sensor Defects On Canon Cameras

Wed Jul 13, 2005 4:16 pm

"since Canon doesn't actually assemble the bodies in clean rooms" [original post]

With all due respect, I doubt it.
'Science without religion is lame, religion without science is blind'. Albert Einstein
 
dc10tim
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RE: Sensor Defects On Canon Cameras

Wed Jul 13, 2005 4:36 pm

I'm guessing from the replies that there's no way of cleaning the dust that is under the filter?

So what do you do? Is it a matter of simply taking it back and trying a new one until you get one that's clean?

Tim.
Obviously missing something....
 
fergulmcc
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RE: Sensor Defects On Canon Cameras

Wed Jul 13, 2005 5:51 pm

Quoting TACAA320 (Reply 22):
With all due respect, I doubt it.

What! ..... that the Earth is flat?! ..... Just a rumour I think Big grin

Quoting DC10Tim (Reply 23):
So what do you do? Is it a matter of simply taking it back and trying a new one until you get one that's clean?

I would, but I guess that's easier said than done when you buy it from a non local shop like 7Dayshop.com, the thought of having to send that back each time would do my head in. Thankfully my 10D is spotless.  Smile

Take care

Fergul Big grin  sun 
Zambian Airways, Where the Eagles fly free!!

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