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<blockquote data-quote="BackdoorArts" data-source="post: 304927" data-attributes="member: 9240">There is definitely a pattern - the smaller the aperture the more apparent the line.&nbsp; This is because the greater depth of field is making it more visible.&nbsp; It's either on/in the lens, likely towards the back element, or in the camera?Is this the only lens you have?&nbsp; If not, do this with two different lenses.&nbsp; Put the lens in manual focus mode, turn the focus wheel so that the focus is set to the closest setting, put the camera in aperture priority mode and set the aperture to the smallest setting (highest number).&nbsp; Then take a photo of a brightly lit white wall or white piece of paper.&nbsp; If the line shows up in photos from both lenses then it's in the camera, if only the one lens then it's in that lens.It looks like a hair, eyelash or fiber of some sort to me.&nbsp; It could be on the sensor, back element, or possibly inside the lens (I'm not sure how the 18-135mm is - some zooms have a rear element that retracts, so it's actually easier for dust to get inside the lens, so care needs to be taken when switching).</blockquote>

[QUOTE="BackdoorArts, post: 304927, member: 9240"] There is definitely a pattern - the smaller the aperture the more apparent the line. This is because the greater depth of field is making it more visible. It's either on/in the lens, likely towards the back element, or in the camera? Is this the only lens you have? If not, do this with two different lenses. Put the lens in manual focus mode, turn the focus wheel so that the focus is set to the closest setting, put the camera in aperture priority mode and set the aperture to the smallest setting (highest number). Then take a photo of a brightly lit white wall or white piece of paper. If the line shows up in photos from both lenses then it's in the camera, if only the one lens then it's in that lens. It looks like a hair, eyelash or fiber of some sort to me. It could be on the sensor, back element, or possibly inside the lens (I'm not sure how the 18-135mm is - some zooms have a rear element that retracts, so it's actually easier for dust to get inside the lens, so care needs to be taken when switching). [/QUOTE]

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