BetterPhoto Q&A
Category: New Questions

Photography Question 
Diego 
 

Spots in pictures (2)


 
  Spots in picture
Spots in picture
© Diego
Canon PowerShot A8...
 
 
Every time I take an indoor Photograph with my Cannon PowerShot A85, there are spots in the image. I thought it occurred at random, and with black backgrounds, but no, other pictures i've taken have the same problem and they were taken in a light background, indoors.
I'm sending an example, i've circled a few of the spots.

[URL=http://www.imageshack.us][IMG]http://img80.echo.cx/img80/1488/spots25sk.jpg[/IMG][/URL]

Direct Link:
http://img80.echo.cx/my.php?image=spots25sk.jpg


I'll be very grateful for your help.
Thank you!!
Diego.-


To love this question, log in above
5/8/2005 11:33:10 AM

 
Stephen J. Laurent
BetterPhoto Member Since: 5/2/2005
  Hey -
IT IS GHOSTS !

LOL - I'm pretty sure this is dust in the air - and/or on the lens -

There was a lot of people in the ghost business - psychics and such - who were trying to pass these off as ghosts for a while - You can see many collections of shots with these spots -called "globules" by the ghost hunters - if you poke around online a little.

The theories were debunked and the culprit was deemed to be DUST.

I use to get them all the time too on my Cannon s100 digital. - Never could seem to predict them - although the flash seemed to play a big role. Never got any without a flash fire - I thought perhaps it was a feature of digital - But I never see it on my Nikon D70 - I wish I knew how to tell you to avoid it - But At least I can tell you I am pretty sure that the spots themselves are Dust in the air.

Make sure your lens is good and clean too.

good luck - this is a common thing - I think Cannon in particular does this more - perhaps the optics are too sensitive.

stephen


To love this comment, log in above
5/8/2005 3:46:27 PM

 
Michael H. Cothran   The problem is simple - you have a dirty sensor. You can pay Canon to clean it for you, or go to www.cleaningdigitalcameras.com for thorough instructions in cleaning it yourself.
Michael H. Cothran
www.mhcphoto.net


To love this comment, log in above
5/8/2005 7:38:03 PM

 
Stephen J. Laurent
BetterPhoto Member Since: 5/2/2005
  Hey again -

Not to disagree - you could well have a dirty sensor - But it is curious - Like I said - I have had this problem before - I have had it happen where I took a series of shots and some had it some didn't - Same subject - location - and lighting - The ones that did have the spots did not show the spots in the same place each time - and the amount of spots varied - If this were dirt on the sensor - Would the spots not always be there? And - Would they not tend to be in the same place in sequintal shots? - I had this happen with my Cannon S100 when it was brand new - certainly the sensor wasn't dirty right out of the box - Also unlike DSLR's - the sensor on a point and shoot Cannon is closed in - there is no way to get to it without taking it apart. - So how does such a part get so dusty?

Also - why - as in my case and I suspect in Diego's case - Do I never see this occur without a flash-

I said "not to disagree" - but I guess I am - LOL - I really think it is dust and moisture in the air reflecting the flash - When I go to an old wodden house with open windows and use a flsh - I see them every time - The number of spots always increases with the amount of dust or moisture in the environment - in the air.

Also I have seen these exact same spots on my Sony video from time to time if there is a bright point of light in the shot - in the video form -- I see them moving through the air - all this leads me to be quite sure it is indeed dust or water (high humidity reflecting the flash) in the air. You are goin to have to send your model in to be cleaned - you just can't get to that chip like an DSLR - And I'd be very surprised if that chases these spots away.

http://tmghosthunters.com/orbs.html

This is a section from a paranormal debunk sight - they have recreated this many times in experements to diprove ghost theories - I have seen this dicussed many other places not relating to ghost stories - I just like ghost stories :) - it's not what is on your sensor it is what is in the air plus the use of a flash.

"Did you ever wonder why most of these "orb" photos occur outside or in dusty basements and old homes? Some interesting research has been conducted over the past several months, and the number one cause for these objects - SKIP THIS SECTION IF YOU WANT TO REMAIN MYSTIFIED - is dust, pollen, and fibers in the air. When caught in transit, close enough to the camera lens with a bright enough flash and quick enough film, you too can produce your own "orb" photos to delight and mystify all. It seems that digital cameras are notorious for creating globules or spheres from reflections of such things as dust, moisture and other airborne particles"

Every time I have ever seen this type of thing in my shots it was in an older house - or highly humid and I was using a flash - Dirty sensor is an easy answer - But I would be quite surprised to find that it solves this problem - Your spots are always in drastically DIFFERENT places in the image - Yes?

Dust on the sensor would show as a tiny spec - Not as a big round ball that is clearly reflecting and refracting light and if you look close you can see they do not occur on the same plane = They are at different points in the room relative to the shooter.

stephen


To love this comment, log in above
5/9/2005 9:41:21 AM

 
Stephen J. Laurent
BetterPhoto Member Since: 5/2/2005
  http://www.tmghosthunters.com/photos/

This is a link to a page of photos that the ghost hunters site has - Looks mighty familiar eh? - Lots of these were produced on film - Film cameras don't have a sensor!

stephen


To love this comment, log in above
5/9/2005 9:50:00 AM

 
Christopher A. Vedros
BetterPhoto Member Since: 3/14/2005
  Well, I have no problem disagreeing with you guys. ;-)

I don't think this is a case of dust in the air. Many of the rows of seats are in focus, but none of the "spots" look to be in focus.

Maybe the "ghosts" can sense your depth-of-field and stay out of it so as to appear more "ghostly". Or maybe not.

Dust or dirt on the sensor is more likely with a digital SLR, though I guess it's possible with the A85 P&S.

I think it's more likely to be just dust or dried water spots on your lens. Clean it carefully, and take some before & after test shots of a blank light-colored surface and a blank dark-colored surface to see if it does any good.


To love this comment, log in above
5/9/2005 11:40:59 AM

 
Christopher A. Vedros
BetterPhoto Member Since: 3/14/2005
  Well, I have no problem disagreeing with you guys. ;-)

I don't think this is a case of dust in the air. Many of the rows of seats are in focus, but none of the "spots" look to be in focus.

Maybe the "ghosts" can sense your depth-of-field and stay out of it so as to appear more "ghostly". Or maybe not.

Dust or dirt on the sensor is more likely with a digital SLR, though I guess it's possible with the A85 P&S.

I think it's more likely to be just dust or dried water spots on your lens. Clean it carefully, and take some before & after test shots of a blank light-colored surface and a blank dark-colored surface to see if it does any good.


To love this comment, log in above
5/9/2005 11:40:59 AM

 
Christopher A. Vedros
BetterPhoto Member Since: 3/14/2005
  Well, I have no problem disagreeing with you guys. ;-)

I don't think this is a case of dust in the air. Many of the rows of seats are in focus, but none of the "spots" look to be in focus.

Maybe the "ghosts" can sense your depth-of-field and stay out of it so as to appear more "ghostly". Or maybe not.

Dust or dirt on the sensor is more likely with a digital SLR, though I guess it's possible with the A85 P&S.

I think it's more likely to be just dust or dried water spots on your lens. Clean it carefully, and take some before & after test shots of a blank light-colored surface and a blank dark-colored surface to see if it does any good.


To love this comment, log in above
5/9/2005 11:42:03 AM

 
Christopher A. Vedros
BetterPhoto Member Since: 3/14/2005
  Did I stutter?

I hate it when that happens.


To love this comment, log in above
5/9/2005 11:43:36 AM

 
Diego   
 
  spots
spots
© Diego
Canon PowerShot A8...
 
  spots
spots
© Diego
Canon PowerShot A8...
 
  spots
spots
© Diego
Canon PowerShot A8...
 
 
People.
First at all: thanks for your answers.
But I don't think the problem is ghosts :-)
I'm posting 3 new photos with spots.
What do you think?
The problem is the lens, the camera, what?


To love this comment, log in above
5/9/2005 12:03:19 PM

 
Stephen J. Laurent
BetterPhoto Member Since: 5/2/2005
  Oh - I totally agree it could be on the lens - I mentioned that - was assuming his lens was clean - I HAVE seen similar spots from a dirty lens and I have seen shots with dust on the sensor. Sensor dust doesn't usually look like that - it looks more like a spec - no focus qualities at all just a dark spec.

I just saw a 2 hour show on this very subject - again in the ghost realm - on the Discovery channel last week - They all had very clean equiptment - They were really hoping to find a ghost and the attention to the array of high end photo and video equiptment was religious. Time and time again they dismissed this exact type of spot as dust in the air - and even caught it on video. Someone upstarirs stomped on the floor and the screen filled with these little spots from the dust it produced in the air on the first floor.

Diego - - - Is your lens clean?


To love this comment, log in above
5/9/2005 12:06:09 PM

 
Stephen J. Laurent
BetterPhoto Member Since: 5/2/2005
  OK
These do look more like something on the lens - Still the position is changing - did you wipe the lens with anything between the shots?

Another time I have gotten this was when I had my camera in a waterproof housing that produces condensation on the inside - Truth is I think we are all right - on the lens - in the sensor - or in the air - there is some dirt getting in the picture - I really don't think it's in the sensor though - Try the lens first -


To love this comment, log in above
5/9/2005 12:15:23 PM

 
Diego    Stephen, I don't speak wery well english, but in other words, you mean I should clean the lens (without open the camera!!).
I've tried to do it. But I will try again.

Thanks! ;-)
Diego.-


To love this comment, log in above
5/9/2005 12:20:10 PM

 
Christopher A. Vedros
BetterPhoto Member Since: 3/14/2005
  Diego,
Try to get a good lint-free cloth that is meant for cleaning camera lenses. I try to keep my lenses clean, but dust happens. Sometimes you just can't avoid it.

I think the best "tool" for cleaning specs of dust is the clone tool in your image editing software.


To love this comment, log in above
5/9/2005 12:41:58 PM

 
Stephen J. Laurent
BetterPhoto Member Since: 5/2/2005
  Yes - If the problem is not in the air - I think it must be on the lens - I would not try to clean the sensor until you have tried to clean the lens really well - Be sure to use lint free cloths and a good cleaning solution - residue from the solution you use may do this also.
- If this was dust on the sensor -
It would prevent light from hitting the sensor and produce a dark spot - Simply a place where there is NOTHING recorded. I'd bet my left leg there is nothing on your sensor and you could damage it if you are not very careful. Would be sad to ruin your camera for a dirty lens.

Sorry if the english problem made my other posts hard to read - I was using the ghost stuff because this was the first place I found examples of this type of spot when I was having the same trouble.



To love this comment, log in above
5/9/2005 12:45:19 PM

 
Zdenka EVANS   Hi,

I have the same problem with my pictures; different size spots in different places,mostly on the indoor shots.

Another photographer told me it might be a fault on the memory card, what do you think?

However I do recall that the spots only started to appear after taking outdoor pictures in a drizzly rain - on a 35mm camera I would check the lense but I cleaned the lense and spots remain. What puzzles me most is their unpredictability - one picture can be spot-less and next one will have the spots, although they were both shot at the same time.

Of course I can digitally remove them but to be honest I am just too lazy to bother.

Any thoughts on the memory card?


To love this comment, log in above
6/29/2005 2:32:11 PM

 
Christopher A. Vedros
BetterPhoto Member Since: 3/14/2005
  I don't think it is technically possible for your memory card to put spots on your photos.

Spots in images can be caused by dust on your digital sensor, dust or spots on the front or rear lens element, or even dust on an internal element. These spots or specks might only be visible at certain apertures. They also might only be visible on light or dark colored backgrounds. They also might only be visible when you are focused at a certain distance or zoomed to a certain focal length.

Some spots, depending on what element they are on, might always appear in the same place in an image. Dust can easily move around, though. The static electricity that attracts dust to a digital sensor is not constant, so there's no reason to think that dust on the sensor will always stay in one spot.


To love this comment, log in above
6/29/2005 2:50:45 PM

 
Diego    Dear Zdenka:
I don't think the problem is the memory.
Finally I've changed my camera (because it was under warranty).
But in some cases stains still appear.
I don't know what the problem is.
Perhaps Canon PowerShot A85 has a problem (all cameras, not only my camera).


To love this comment, log in above
7/1/2005 5:21:08 AM

 
Kurt  Hawkins
BetterPhoto Member Since: 9/16/2005
  i just shot a wedding inside with flash and got the same reflections off dust in the air (in my opinion) on a few of my pics .. sensor and lens was clean .. I difinitely believe it is dust reflecting the flash


To love this comment, log in above
11/18/2007 4:54:37 AM

 
Log in to respond or ask your own question.