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mark on the top left corner of my pictures
I have a new Nikon D80. I just noticed today that there's a hair-like mark on most of my photos. Here's the odd thing, the hair-like mark does not always show up or is very faint or fuzzy at times. It seems to be sharper or fuzzier depending on focusing or the zoom of the picture. At times, it doesn't appear to be visible at all. What the heck is it? I'm thinking it's something in or on the lens..

What are you thoughts..

I don't have another lens to swap to test out this theory...

Comments (12)

I have a new Nikon D80. I just noticed today that there's ahair-like mark on most of my photos. Here's the odd thing, thehair-like mark does not always show up or is very faint or fuzzy attimes. It seems to be sharper or fuzzier depending on focusing orthe zoom of the picture. At times, it doesn't appear to be visible.

...depending on depth of field and focus. It's probably sharper with a smaller aperture (say, f/22...) and shorter focal length..

At all. What the heck is it? I'm thinking it's something in or onthe lens..

Might be a scratch (or small piece of hair?) on the sensor or a lens element. Probably not the front lens element it'd have to be a pretty significant scratch to be noticeable on an image. You could remove the lens and look through it, 'tho...

Comment #1

I did look at the lens but couldnt see anything..

The odd thing is... it's a brand new camera. Only had it for 3 weeks. When I got it I put the lens on carefully and have not taken it off since, until now to check it..

If it's the sensor, would it not be on every picture?.

Leejay Wu wrote:.

I have a new Nikon D80. I just noticed today that there's ahair-like mark on most of my photos. Here's the odd thing, thehair-like mark does not always show up or is very faint or fuzzy attimes. It seems to be sharper or fuzzier depending on focusing orthe zoom of the picture. At times, it doesn't appear to be visible.

...depending on depth of field and focus. It's probably sharper witha smaller aperture (say, f/22...) and shorter focal length..

At all. What the heck is it? I'm thinking it's something in or onthe lens..

Might be a scratch (or small piece of hair?) on the sensor or a lenselement. Probably not the front lens element it'd have to be apretty significant scratch to be noticeable on an image. You couldremove the lens and look through it, 'tho...

Comment #2

Show us the pics and we can tell you almost certainly what it is...

Comment #3

I once had almost the exact same thing. A hair-like defect in the image that wasn't always exactly the same. It would move around a bit and be oriented slightly differently. Sometimes it didn't even show up at all. One thing though, it was always along the same edge. When I finally found it, it turned out to be a wool fiber from a sweater that had somehow gotten into the shutter mechanism.

I didn't damage the shutter, but I guess I could have if I hadn't been very careful and lucky...

Comment #4

Ok, thanks guys.

I will try to post the pictures, once I set up an account to post to flickr, etc..

A piece of hair or fiber around the shutter area would make sense, as sometimes it is clear focused, sometimes not, sometimes almost non-existent...

Comment #5

Here are the photos. Notice on photo dsc_0037 you can hardly see anything on the top left corner, but if you look at dsc_0057 it's clearer, and DSC_0096 is very apparent..

Http://www.flickr.com/photos/8665268@N08/.

Thanks.

By the way, I know, the photos themselves are pretty bad.   poor composition, lighting, etc...

Comment #6

I think it's just a fiber sticking to the camera's sensor. Best way to get rid of it? Get a Giottos Rocket Blower. Turn camera off. Remove lens. Point the lens mount/body towards the ground. Puff away..

Do not use a vacuum cleaner, compressed air or anything similar. A Rocket Blower only!..

Comment #7

I agree that it looks like a mark on the sensor as opposed to the lens, but I would be VERY careful about blowing anything into the sensor chamber. I would recommend getting a magnifying glass and trying to identify the mark (which will be bottom right on the sensor) and IF you can see a fibre or speck of dust, try GENTLY blowing it off. If you can't see anything, you could try a sensor swab, or even a small vacuum device. Personally - given where it is - I would be inclined to live with it if you can't easily dislodge it. By blowing on it, it might end up stuck to the centre of the sensor, and that would be a real pain...

Comment #8

Spolky wrote:.

I would recommend getting a magnifying glass andtrying to identify the mark (which will be bottom right on thesensor).

Top left on the picture = bottom right on the sensor, viewed from the back. Viewed through the lens opening it is bottom left...

Comment #9

Yeh sorry I always get confused like that! I have no idea if you're right but as I was just guessing, I'm sure you are ..

Comment #10

As the others have said, it's a tiny object on the filter in front of the sensor. Since it seems to move around, it isn't stuck...probably held there by a static charge? Thus, it will be easy to dislodge..

You might be interested to understand HOW we know it's on the filter and not on the sensor, shutter, mirror, lens, etc. It's because the 3 pix you posted were at 3 different apertures: F5.6, F11, and F22...and the sharpness of the "hair" is correlated with the aperture. It's very blurry at F5.6 and very sharp at F22. That is exactly as would be expected if it was on the sensor. The reason is that when the lens opening (aperture) is large, the light is incident from a large "hole" and in coming in at different angles, it doesn't cast a clear shadow. When the aperture is small, the light comes from only a small "hole" and thus the shadow is clear..

If the "hair" was on the sensor, it would be clearly defined regardless of the aperture...besides, it's sorta difficult for anything to get between the filter and sensor because it's well sealed. Something on the mirror (if it was big enough) would be visible in the VF, but would not be in the light path when the mirror flips up. Things in the lens normally are OOF and don't get imaged..

To remove it, 1st try blowing it off. You have to raise the mirror and hold the shutter open. The D80 has a special menu item that does this (it requires a fully charged battery!). After blowing it with a Rocket Blower, test to see that it's gone by taking a pic of a solid color (the sky is good) with a small lens opening (e, F22). You can repeat this if the air moves it around but not off the sensor..

If air blasts don't work, try Dust-Aid. They are small tacky pads on a handle that you gently press on the filter surface. They pick up anything that is not stuck to the surface (like pollen)..

As a last resort, try wet swabbing with Eclipse E2. Don't use regular Eclipse. The D80 has a conductive coating on the front to help dissipate static charges...you must use the E2 version to preclude damaging that coating..

Use Google to find one of the many sites that explain in detail how to do the wet swabbing..

Charlie DavisNikon 5700, Sony R1, Nikon D300HomePage: http://www.1derful.infoBridge Blog: http://www.here-ugo.com/BridgeBlog/'Experience: Discovering that a claw hammer will bend nails.Epiphany: Discovering that a claw hammer is two tools...'..

Comment #11

Hey Everyone thats for all the detailed explanation. I took the easy way out. I went back to Best Buy and the manager there was nice enough to exchange my camera even though it passed the standard 2 weeks return date. But the information you guys provided will be useful for future reference..

Thanks again..

Comment #12

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This question was taken from a support group/message board and re-posted here so others can learn from it.

 

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