Steve'sDigicams

Herb · Dec 8, 2002, 11:06 PM

A friend of mine has a C2100UZ. He's just sent me some pictures. He's puzzled why there's a dark spot in the pictures at the top left .

The spot shows up at about the size of a dime when the picture's displayed at its 1200x1600 size.

The spot's just slightly darker than it's surroundings. It doesn't have sharp edges and is only noticeable if that part of the picture's of a fairly uniform color - e.g. in a picture of a plain blue or mostly grey sky.

He asks if it's caused by the lens, but I shouldn't think that's possible.

I incline to think that it's a defect in the coating of the image sensor. I even wonder if the camera's been left lying around without the lens cap on and pointing at a strong light that's 'burned' the sensor in that spot and made the spot a bit less sensitive.

Has anybody encountered this sort of phenomenon? Have you any explanation for it?

Skiola · Dec 9, 2002, 12:39 AM

Has friend cleaned the front of the lens?

gibsonpd3620 · Dec 9, 2002, 8:01 AM

Can you post the picture. You can post at www.pbase.com for free.

Klaus DK · Dec 9, 2002, 9:56 AM

On my old Nikon CP990 I suddenly had the same problem you describe. I cleaned the lens but soon discovered that a little bit of dust had come in behind the glass in the lens. This showed up as a little spot very diffused in the edge.

Went to Nikon got the lens cleaned. No problem!

The spot - of course - was on the same place on all pic, allthough sometime - depending on colors - was not as visible as others.

Herb · Dec 9, 2002, 5:41 PM

I've uploaded two pictures of the dark spot to pbase, but I'm having trouble navigating there! One picture shows the dark spot in the top left hand corner of a picture of sky & mountains: the other picture is the same dark spot, much enlarged, and to whicj I've added a lot of contrast to make it show up.

I don't know whether you can access pbase - but I've adopted the user name of embe

Maybe this will take you to them -

<A HREF="http://www.pbase.com/embe/root"/A>click for embe

gibsonpd3620 · Dec 9, 2002, 6:16 PM

Looking at the photos would lead to Klaus' conclusion of lint.

Herb · Dec 9, 2002, 10:10 PM

Thanks for the opinions. I've passed them on.

Klaus DK · Dec 10, 2002, 12:47 AM

After seeing your photos - I say they looked just like mines with the inside dust!

MentorRon · Dec 15, 2002, 1:58 PM

I had a similar problem with a Fuji FinePix 1300. In that case it was a VERY small star shaped 'ding' in the glass lens protective cover. It was only visible if the related area in the photo was a perfectly blue sky. To see the ding, you need a 30X magnifier, so it wasn't noticed at purchase time.
It's been almost a year that Fuji Canada has had the 'part' on backorder, but don't expect it will ever get fixed.

Dec 8, 2002, 11:06 PM	#1
Herb Senior Member Join Date: Jun 2002 Location: Victoria, B.C., Canada Posts: 1,018	Dark spot in pictures A friend of mine has a C2100UZ. He's just sent me some pictures. He's puzzled why there's a dark spot in the pictures at the top left . The spot shows up at about the size of a dime when the picture's displayed at its 1200x1600 size. The spot's just slightly darker than it's surroundings. It doesn't have sharp edges and is only noticeable if that part of the picture's of a fairly uniform color - e.g. in a picture of a plain blue or mostly grey sky. He asks if it's caused by the lens, but I shouldn't think that's possible. I incline to think that it's a defect in the coating of the image sensor. I even wonder if the camera's been left lying around without the lens cap on and pointing at a strong light that's 'burned' the sensor in that spot and made the spot a bit less sensitive. Has anybody encountered this sort of phenomenon? Have you any explanation for it?

Dec 9, 2002, 5:41 PM	#5
Herb Senior Member Join Date: Jun 2002 Location: Victoria, B.C., Canada Posts: 1,018	Mysterious dark spot I've uploaded two pictures of the dark spot to pbase, but I'm having trouble navigating there! One picture shows the dark spot in the top left hand corner of a picture of sky & mountains: the other picture is the same dark spot, much enlarged, and to whicj I've added a lot of contrast to make it show up. I don't know whether you can access pbase - but I've adopted the user name of embe Maybe this will take you to them - <A HREF="http://www.pbase.com/embe/root"/A>click for embe

Dec 9, 2002, 10:10 PM	#7
Herb Senior Member Join Date: Jun 2002 Location: Victoria, B.C., Canada Posts: 1,018	Dark spot Thanks for the opinions. I've passed them on.

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Dec 9, 2002, 12:39 AM	#2
Skiola Senior Member Join Date: Jun 2002 Posts: 104	Has friend cleaned the front of the lens?

Dec 9, 2002, 8:01 AM	#3
gibsonpd3620 Senior Member Join Date: Sep 2002 Posts: 3,585	Can you post the picture. You can post at www.pbase.com for free.

Dec 9, 2002, 9:56 AM	#4
Klaus DK Senior Member Join Date: Aug 2002 Posts: 2,216	On my old Nikon CP990 I suddenly had the same problem you describe. I cleaned the lens but soon discovered that a little bit of dust had come in behind the glass in the lens. This showed up as a little spot very diffused in the edge. Went to Nikon got the lens cleaned. No problem! The spot - of course - was on the same place on all pic, allthough sometime - depending on colors - was not as visible as others.

Dec 9, 2002, 6:16 PM	#6
gibsonpd3620 Senior Member Join Date: Sep 2002 Posts: 3,585	Looking at the photos would lead to Klaus' conclusion of lint.

Dec 10, 2002, 12:47 AM	#8
Klaus DK Senior Member Join Date: Aug 2002 Posts: 2,216	After seeing your photos - I say they looked just like mines with the inside dust!

Dec 15, 2002, 1:58 PM	#9
MentorRon Senior Member Join Date: Sep 2002 Posts: 307	I had a similar problem with a Fuji FinePix 1300. In that case it was a VERY small star shaped 'ding' in the glass lens protective cover. It was only visible if the related area in the photo was a perfectly blue sky. To see the ding, you need a 30X magnifier, so it wasn't noticed at purchase time. It's been almost a year that Fuji Canada has had the 'part' on backorder, but don't expect it will ever get fixed.