Canon T4i (650D) Horizontal Line on Pictures

I have never seen lines like that in my nighttime shots. Do you have another lens you could try that with?

Have you seen these lines prior to these nighttime shots?

Not good news. What is happening is that the connection to those two lines on the sensor are bad. If its in warranty, it is clearly a warranty repair, so go ahead and send it in. Either way you'll need a new sensor assembly ... and with the replacement you'll also probably need the AF re-calibrated - so send it in with your favorite lens as well.

I had a similar problem in my T4i after use of 6 months and around 7000 pics. Sent it for repaire under warrenty. Canon replaced the CMOS sensor, readjusted autoexposure and focus. All was done without any charge. Don't forget to send proof of purchase to them.

Problem i faced was that i was getting same horizontal single solid line in all my pics irrespective of mode used or lens used.

I was very much upset by seeing such huge problem which required to change the sensor unit itself. Product like these much costly should not have these problems at so early stage after purchase. Though i won't forget to appreciate canon technical support and repair process. They were fast and quick in identifying the problem over the phone in 5 minutes and providing me the shipping label. Also camera got fixed and delivered to me within 2 weeks. Hope it wont cause any more issues at least for couple of years except shutter unit which is cheap and very unreliable part of any DSLR irrespective of brand.

Wish you all the best with repair!!!

Anurag24k said:

Anurag24k wrote:

I had a similar problem in my T4i after use of 6 months and around 7000 pics. Sent it for repaire under warrenty. Canon replaced the CMOS sensor, readjusted autoexposure and focus. All was done without any charge. Don't forget to send proof of purchase to them.
Problem i faced was that i was getting same horizontal single solid line in all my pics irrespective of mode used or lens used.
I was very much upset by seeing such huge problem which required to change the sensor unit itself. Product like these much costly should not have these problems at so early stage after purchase.

Click to expand...

Then consider these instances:

Brand F camera came with sensors that caused small 'highlights' even in daytime shots to balloon out into huge 'orbs', grotesque photo-ruining circles that looked like someone had taken a large paper punch to the photo. It took the mfr quite a while to finally admit that there might be a problem and to come up with replacement sensors that didn't exhibit the problem. (These were NOT simple blown highlights BTW.)

Brand F camera with zoom lens that droops and wiggles by several MM at full extension.

Both of those issues were due to poor engineering or assembly, not just a faulty sensor that probably did pass the QC inspections originally.

You're right that expensive items ought to not have issues with them right away, but Canon generally has as few or fewer issues with their cameras compared to anyone else.

IllinoisXman said:

IllinoisXman wrote:

Hello,

I went out to take some pictures of Chicago at night by my Canon Rebel T4i. The lens I used was 18-135 STM. When I got home to watch the pictures I took, I was surprised to see a horizontal line (two lines sometimes) on most of my pictures. The pictures were taken in Handheld Night Scene Mode. The line appeared in different colors. Here are some of the pictures which had lines on them. Please tell me if this line is normal.

Click to expand...

Did you have a polarizer or other filter on?

R2

As pointed out by others, a line on the sensor could indicate one row of pixels being affected, i.e. some broken electronics somewhere. This can happen!. Had a iMac screen, where suddenly one pixel went bonkers, creating a pixel sized horizontal and vertical line across the screen centered on that pixel. Fixed on warranty. A lot of chips in chip production (memory, LCDs, sensors) get thrown out because of defects already during production. Some seem to be ok and make it into the product, to fail with minor defects later (dead pixels - most sensors have them actually, etc.). Any such problem you should fix under warranty.

However, the problem should be identical from shot to shot, which does not seem to be the case in your samples. You should test if you get the problem in standard long time exposures at night - Well, just take a couple of long time exposures with the lens cap on, at e.g., f22. Do the lines show up, in the same place?

The reason I am saying this is because you state that you used hand-held Night scene mode. This takes 3 faster shots and puts them together in the camera. I suspect the lines you see - because they are not the same - could be actually an interpolation artifact from this Night Scene mode.

So, to summarize, test first if the problem shows up in normal long time mode. If yes, get the camera fixed. If not, take more night scene shots, as mentioned, possibly some interpolation artifact. A report to Canon, and a firmware update might then fix it.

IllinoisXman said:

IllinoisXman wrote:

Hello,

I went out to take some pictures of Chicago at night by my Canon Rebel T4i. The lens I used was 18-135 STM. When I got home to watch the pictures I took, I was surprised to see a horizontal line (two lines sometimes) on most of my pictures. The pictures were taken in Handheld Night Scene Mode. The line appeared in different colors. Here are some of the pictures which had lines on them. Please tell me if this line is normal.


You can see the blue line almost in the middle of the picture.


A white line and another slightly blue one beneath it.

Click to expand...

--
*** Life is short, time to zoom in *** ©

R2D2 said:

R2D2 wrote:

Did you have a polarizer or other filter on?

R2

Click to expand...

Hello?

The horizontal lines are not normal. Unfortunately I purchased a bad 70D and was getting similar lines on my images and video footage. I sent it to Canon multiple times to get serviced but their technicians were unable to troubleshoot it and they kept sending me the camera back with the same issue. It was frustrating because I have so many ruined images and ruined footage from several jobs. So on the 3rd and final time, I refused to take back the 70D and asked for a camera upgrade and they agreed. I hope you were able to get your camera fixed!