Help with my 6D please. Where is this mark coming from? I was setting up on this crystal clear night to take some star shots and noticed a big mark in the top left of all my initial...

Resqu2 Loc: SW Va

I was setting up on this crystal clear night to take some star shots and noticed a big mark in the top left of all my initial pics, can't see a thing so I changed lens and still there. It's either real defined or more blended depending on f number. I have looked and looked but can't see a thing. I know someone here can tell me what to do.

ebbote Loc: Hockley, Texas

To me it looks like a hair or piece of lint on you sensor, I would take the lens off, lock up the mirror and very gently clean the sensor with either canned air or cotton swab. Careful with the canned air or better yet use a syringe, be gentle.

TriX Loc: Raleigh, NC

Debris (a hair) on the sensor? Suggest cleaning.

RichardSM Loc: Back in Texas

Resqu2 wrote:

I was setting up on this crystal clear night to take some star shots and noticed a big mark in the top left of all my initial pics, can't see a thing so I changed lens and still there. It's either real defined or more blended depending on f number. I have looked and looked but can't see a thing. I know someone here can tell me what to do.

It maybe a hair or lint of some kind on your mirror.

Resqu2 Loc: SW Va

Ah thanks so much guys, I had to look up how to lock up the mirror but as soon as I did there it was, a crazy hair.

Kissel vonKeister Loc: Georgia

Resqu2 wrote:

I was setting up on this crystal clear night to take some star shots and noticed a big mark in the top left of all my initial pics, can't see a thing so I changed lens and still there. It's either real defined or more blended depending on f number. I have looked and looked but can't see a thing. I know someone here can tell me what to do.

I'd say it's a hair or strand of fuzz in front of the sensor, not on it. It's a bit out of register and if it were ON the sensor it would be sharply rendered. As you look in at the sensor it's sticking up from the bottom.

chaman

Cotton swab? Unless you want to make more it dirty or worse dont do that!!! Incorrect info that will damage your camera. Stay away from canned air too. You need a specially designed tool to clean it properly. Try this:

https://www.amazon.com/Rubber-Blower-Cleaner-Sensor-Camera/dp/B016JNIC2E?ie=UTF8&%2AVersion%2A=1&%2Aentries%2A=0&portal-device-attributes=desktop

I wonder if some of these geniuses giving this kind of advice would assume any responsibility for any damage to your camera.

Resqu2 Loc: SW Va

chaman wrote:

Cotton swab? Unless you want to make more dirty or... (show quote)

Once the mirror locked up I held it upside down and very gently blew on it, the hair was not stuck and fell right off. I wasn't touching the sensor with anything no matter what. Thanks again guys!

chaman

Resqu2 wrote:

Once the mirror locked up I held it upside down and very gently blew on it, the hair was not stuck and fell right off. I wasn't touching the sensor with anything no matter what. Thanks again guys!

Thank God you didnt followed the cotton swab or canned air "advice". Get one of these blower tool and use it regularly.

Resqu2 Loc: SW Va

chaman wrote:

Thank God you didnt followed the cotton swab or canned air "advice". Get one of these blower tool and use it regularly.

I will pick one up and throw it in my bag. I don't know how anything got there, I try to be sooo careful and quick changing lens to keep this from happening.

CO

Resqu2 wrote:

Once the mirror locked up I held it upside down and very gently blew on it, the hair was not stuck and fell right off. I wasn't touching the sensor with anything no matter what. Thanks again guys!

Get a good filtered blower. I got the Koh Global Hepa Jet Air II blower. It has a large hepa filter, an anti-static filter, and one-way check valve. Its bulb is made of medical grade PVC instead of rubber. Rubber bulbs can flake off particles which will then be blown on your sensor. The PVC bulb won't do that. Adorama Camera has it. You can also order it directly from Koh Global.

chaman

I have this one.

https://www.amazon.com/Giottos-AA1900-Rocket-Blaster-Large/dp/B00017LSPI/ref=pd_sbs_421_2?_encoding=UTF8&pd_rd_i=B00017LSPI&pd_rd_r=ER2AHKNASQ7V0RS531MQ&pd_rd_w=RNPHN&pd_rd_wg=xxHRx&psc=1&refRID=ER2AHKNASQ7V0RS531MQ

Haydon

chaman wrote:

I have this one.

https://www.amazon.com/Giottos-AA1900-Rocket-Blaster-Large/dp/B00017LSPI/ref=pd_sbs_421_2?_encoding=UTF8&pd_rd_i=B00017LSPI&pd_rd_r=ER2AHKNASQ7V0RS531MQ&pd_rd_w=RNPHN&pd_rd_wg=xxHRx&psc=1&refRID=ER2AHKNASQ7V0RS531MQ

That's exactly what I use as well. I am fully aware the filtered blasters are better but I decided to cut that corner when I saw it was double the price.

Basil Loc: New Mexico

chaman wrote:

I have this one.

https://www.amazon.com/Giottos-AA1900-Rocket-Blaster-Large/dp/B00017LSPI/ref=pd_sbs_421_2?_encoding=UTF8&pd_rd_i=B00017LSPI&pd_rd_r=ER2AHKNASQ7V0RS531MQ&pd_rd_w=RNPHN&pd_rd_wg=xxHRx&psc=1&refRID=ER2AHKNASQ7V0RS531MQ

Ditto. Works great!

JCam Loc: MD Eastern Shore

Resqu2 wrote:

I was setting up on this crystal clear night to take some star shots and noticed a big mark in the top left of all my initial pics, can't see a thing so I changed lens and still there. It's either real defined or more blended depending on f number. I have looked and looked but can't see a thing. I know someone here can tell me what to do.

Jeeze, I first thought you had captured an alien space ship or a short jet contrail. Just think you could have had a space ship in any photo the contained sky and it you didn't want it just clone it out.