topic Re: Marks showing up in Photos in EOS DSLR & Mirrorless Cameras

Marks showing up in Photos

Mucktown123 — Sun, 07 Jan 2018 00:48:06 GMT

I am noticing what appears to be an upside down hook mark showing up in some of my photos, about 3/4 of the way across the photo. Any suggestions as to what may be causing this? And what I can do to correct this?

I have a Canon EOS Rebel T5 which a few different lenses, so I'm not sure whether its the camera or one of my lenses.

Thanks in advance for any help.

Re: Marks showing up in Photos

Waddizzle — Sun, 07 Jan 2018 01:24:16 GMT

Post a sample picture of it. It could just be dust on the image sensor. Do NOT try to clean it, or wipe it off, though.

Re: Marks showing up in Photos

Mucktown123 — Sun, 07 Jan 2018 14:01:17 GMT

Re: Marks showing up in Photos

Waddizzle — Sun, 07 Jan 2018 14:52:55 GMT

Just as I suspected. Dust.

You have a dirty image sensor. It appears to be dust, which is removed by using bulb blower tool, like a "Rocket Blower". If you do not have any simple cleaning accessories like a bulb-style blower and lens wipes, you should.

Re: Marks showing up in Photos

Mucktown123 — Sun, 07 Jan 2018 15:04:36 GMT

Thanks so once I purchase a rocket blower - this is something I can remedy?

Re: Marks showing up in Photos

Waddizzle — Sun, 07 Jan 2018 15:15:51 GMT

@Mucktown123 wrote:
Thanks so once I purchase a rocket blower - this is something I can remedy?

Yes, this is minor.

Look on YouTube for videos that show you how to use a bulb blower to clean a DSLR. Do not use your mouth to blow inside of the camera body, because your mouth contains moisture, Moisture is the enemy.

You will need to remove any lens, go into the menus, and raise the shutter for manual cleaning. Point the front of the camera downward, so that dust and dirt can fall out of the camera, and use a blower to gently puff air all around the sensor, and inside of the camera body.

Re: Marks showing up in Photos

brummettj — Tue, 28 Sep 2021 14:16:49 GMT

I teach and one of my eos T5s is also showing a mark...it appears to be a question mark ?...we did try to clean with a cloth, but it still is apparent on the darker background images. Solutions besides dust. It is a perfect mark...Here is an image of the mark in the lower right hadn corner.

Re: Marks showing up in Photos

kvbarkley — Tue, 28 Sep 2021 12:40:21 GMT

I certainly hope you did not try to clean the sensor with a cloth!

Post an image so we can see it. I suspect a hair.

Re: Marks showing up in Photos

brummettj — Tue, 28 Sep 2021 18:38:35 GMT

No, not the mirrors, but why would it be so clear, it is a definite question mark...

Re: Marks showing up in Photos

brummettj — Tue, 28 Sep 2021 18:40:00 GMT

Re: Marks showing up in Photos

kvbarkley — Tue, 28 Sep 2021 18:46:49 GMT

I suggest you use the cleaning function and check out the sensor with a magnifier. I still suspect a hair. The only way it can be a question mark is if you pointed the camera at a scanning laser that was writing text. In which case, the sensor is damaged and needs to be replaced.

(BTW, nothing on the mirror can end up on the image since the mirror swings out of the way before the image is taken.)

Re: Marks showing up in Photos

Mucktown123 — Tue, 28 Sep 2021 20:20:47 GMT

My story didn't end so well. Sent my camera in for repair and Canada Post lost it. Thank goodness for insurance. New camera no more marks. Hopefully you'll find a better resolution to your mark. Best of luck.

Re: Marks showing up in Photos

ebiggs1 — Thu, 30 Sep 2021 14:27:54 GMT

Sounds like you have a solution although not the answer to your first query. However, I am 99% sure it was a hair most likely on the sensor. The fact it appears to be a "question" mark is totally coincidence.

Some advice at no extra charge is, never put anything smaller than a football in the mirror box of a camera, Too many things in there that don't respond well to abuse.

Re: Marks showing up in Photos

brummettj — Thu, 30 Sep 2021 18:06:58 GMT

THANKS