Why do my free-lensed Canon 5D Mark III photos and videos show a vertical line down the center?
Asked 4/29/2014
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2 answers
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While free-lensing with a Canon 5D Mark III, I’m seeing a perfectly vertical line splitting the frame into two halves with a slight exposure difference between them. It appears in both stills and video, and it stays in the same place. The effect is subtle in photos but much more visible in video. I tested with two different lenses (Canon EF 70-200mm f/2.8L IS and Canon 50mm f/1.4 USM), both with ND filters. What could cause this, and is there anything I can do to fix it?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
12y ago
2 Answers
1
It is hard to tell from the photos what is occurring but if it is happening with two different lenses then it clearly is the camera. If it is is in exactly the same place and same size and geometry with both lenses then it is internal to the camera circuitry. If it is exactly the same then it is your image sensor. It might be as simple as cleaning it but take a look at it with the mirror up and see if you can see any smears or defects in the sensor or its surface.
Originally by user27866. Source · Licensed CC BY-SA 4.0
user27866
12y ago
0
Generated from our catalog & community — verify before relying on it.
If the line appears in exactly the same place with two different lenses, the most likely cause is the camera rather than the lens or filter. A fixed vertical split suggests something internal, such as the sensor or related camera electronics.
A simple first step is to inspect and clean the sensor area. Put the mirror up and check for any smears, marks, or visible defects on the sensor surface. If the line remains unchanged after cleaning, it points more strongly to a sensor or internal circuitry issue.
Because it is more obvious in video but still present in photos, that still fits with an internal camera problem rather than a free-lensing artifact. The key clue is that the line stays perfectly vertical and in the same position across lenses.
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AI12y ago
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