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DPChallenge Forums >> Individual Photograph Discussion >> Can someone pls tell me WTF this is...
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 03/16/2009 02:11:02 PM · #1


Is sensor dust this F*&#ing BIG or is that something more serious that I need to be concerned about?

Someone have any ideas?

Pls help.
03/16/2009 02:12:32 PM · #2
sensor fuzz??
 03/16/2009 02:12:53 PM · #3
It's a duck. I don't know how it got on your sensor. That could be hard to remove. You'll just have to creatively work around it.

:-)

(Could be a large wad o' sensor dust - could be a waterdrop on the lens?)
 03/16/2009 02:13:09 PM · #4
what aperture is that? could show up like that at more open apertures (f4 - f8). try a shot of open sky at f22 and see what you get.
 03/16/2009 02:13:20 PM · #5
Does it come up in the same spot in all the pictures?

Try taking pics of a uniformly colored object: like a wall.
 03/16/2009 02:14:32 PM · #6
Originally posted by Melethia:
It's a duck. I don't know how it got on your sensor. That could be hard to remove. You'll just have to creatively work around it...

I find a good spritz of "DUCK OFF!" works wonders when this happens to me.
 03/16/2009 02:15:12 PM · #7
if it walks like a duck, and quacks like a duck...
 03/16/2009 02:16:39 PM · #8
I should have known that there would be some good answers from you clowns.

It is the dark ring around the duck that is bugging me.
 03/16/2009 02:20:02 PM · #9
It's sensor dust. Take a picture of the sky or a blank sheet of paper at f/10-f/16. If it's still there, you've got sensor dust.

Message edited by author 2009-03-16 14:20:50.
 03/16/2009 02:21:10 PM · #10
Originally posted by LVicari:
I should have known that there would be some good answers from you clowns.

It is the dark ring around the duck that is bugging me.


is the smear there on the the original?

It's probably most helpful to shoot something like the clear sky, with the lens far out of focus at a high aperture (focus near) and shoot at various exposure compensations (really light/ really dark) and see if the smear is there. When looking at the files, do a really extreme contrast tonal adjustment (make the darks black and the lights white), to really show up anything dirt on the sensor. Be prepared to see a huge amount of dust.

ETA the aperture setting

Message edited by author 2009-03-16 14:24:31.
 03/16/2009 02:22:25 PM · #11
Better yet, slap a pinhole on your camera and you'll see more dust than you've ever imagined possible.
 03/16/2009 02:23:54 PM · #12
Originally posted by LVicari:
It is the dark ring around the duck that is bugging me.

I would worry more about the red rectangle!
 03/16/2009 02:24:03 PM · #13
Oh I know what it is... he is making excuses to upgrade to a 50d or a 5d mk II.. are you now?

;-);-)
03/16/2009 02:29:39 PM · #14
I wouldn't worry about the little spot of sensor dust.

How are you ever going to deal with the bright red box?
 03/16/2009 02:52:40 PM · #15
I have a similar dark spot from my sensor, but several cleanings have not gotten rid of it. Mine is at the edge and it's usually not noticeable, gets cropped out anyway, or is easily cloned out.
 03/16/2009 02:54:29 PM · #16
Originally posted by Prash:
Oh I know what it is... he is making excuses to upgrade to a 50d or a 5d mk II.. are you now?

;-);-)


I am trying to build a case so I can show my wife. "See honey, I can't work with this. This is unacceptable!" Ha

Her reply would be "See what, who's gonna notice?"

So no upgrade!

I managed to get that big fluff off, but man , I found more shit on that sensor. Any recommendations on a DIY cleaning kit. I have tried the blower but its not working. I think I need to swipe it. Also how do I get my viewfinder spotless. The mirror is clean, its the other screen on the underside of the mount opening.(opposite of the mirror)(not the sensor) Don't know the technical name for it.

Thx for the help

ETA 1/100,f8,iso 100,focal length 40mm

Message edited by author 2009-03-16 14:59:18.
 03/16/2009 03:52:41 PM · #17
Originally posted by LVicari:

It is the dark ring around the duck that is bugging me.


Could it be the Ducks using a force field ?
 03/16/2009 04:01:23 PM · #18
looks like a stain (water, grease from shutter)on the sensor, you may be brave enough to do a wet swab clean on your camera. I have become real pro at this now and have a delkin sensor scope (i do not use their swabs as they are total crap)I use VisableDust V swab they are great. The sensor scope is fantastic device that let's you view the sensor close up to see the crap that is causing the trouble so you can pin-point your cleaning target. Good luck with it
 03/16/2009 04:03:13 PM · #19
Originally posted by LVicari:
Any recommendations on a DIY cleaning kit.

I have one of these Dust-Aid cleaning kits It is inexpensive and works ok, but wrapping the cleaning cloths around the wand is a hassle to get right.
 03/16/2009 04:08:25 PM · #20
I've used the Copperhill product with great success. I've never had any problems on either my 20D or 5D.
 03/16/2009 04:27:58 PM · #21
I use tape to clean my sensor. Scotch tape.. And yes I am serious.

Message edited by author 2009-03-16 16:28:30.
 03/16/2009 04:30:25 PM · #22
Originally posted by Jedusi:
Originally posted by LVicari:

It is the dark ring around the duck that is bugging me.

Could it be the Ducks using a force field ?

Hehe. Or maybe it's a big whale ready to swallow him whole from underneath.

Joking aside, good luck getting rid of the spot.
 03/16/2009 04:33:04 PM · #23
Originally posted by brownsm:
I've used the Copperhill product with great success. I've never had any problems on either my 20D or 5D.


Ditto!
 03/16/2009 04:35:07 PM · #24
Originally posted by brownsm:
I've used the Copperhill product with great success. I've never had any problems on either my 20D or 5D.


Glad someone posted that. Cleaning supplies need not be expensive. A little Eclipse fluid goes a long way, and Pec Pads make great swipes when wrapped on a home made holder. Required cleaning frequency will vary greatly depending on:
- The camera model (the 5D shows dust particularly badly)
- Your sensitivity to small particles (the closer you look, the more you see, and if that bugs you...)
- How often you shoot with small aperture (dust is far more visible at f/16 than f/2.8)
- How much you shoot, and in what conditions, and how often you change lenses
Typically, a few times a year is sufficient; come folks clean much more, some less.
 03/16/2009 04:36:24 PM · #25
Originally posted by Dan_Cottle:
I use tape to clean my sensor. Scotch tape.. And yes I am serious.

You really need to use the right tool for the job.
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