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Occasional Contributor
Posts: 5
Registered: ‎01-13-2018

prominent gray streak 70d, what is this!?

Hi Photog. peeps,

 

First off, I love this camera, but I don't understand what this streak is that pops up from time to time. Sometimes it ruins my picture entirely. I sent an email to the co. but wanted to see if anyone had a similar issue. it's pretty clear on the attached image. 

thanks!Screen Shot 2018-01-13 at 12.01.02 PM.png

Super Contributor
Posts: 258
Registered: ‎02-13-2016

Re: prominent gray streak 70d, what is this!?

[ Edited ]

Can't say I've seen anything quite like that before. It kind of looks like a hair or some debris on the sensor or in the lens, but then it kind of doesn't. A little more info might be helpful. Does it always appear in the same place on the image? Does it always appear with just one lens, but not others? Does it make a difference if you're shooting in Live View mode or not?

Occasional Contributor
Posts: 5
Registered: ‎01-13-2018

Re: prominent gray streak 70d, what is this!?

It generally comes up in the same spot, but sometimes it moves more toward the center of the image Screen Shot 2018-01-13 at 12.22.20 PM.png

sometimes its shorter in length, sometimes longer (same with shades of gray)

I have cleaned the sensor multipe times with no change

it happens with every lens I've used

I havent really noticed if it still comes up in live mode

Esteemed Contributor
Posts: 2,260
Registered: ‎11-14-2012

Re: prominent gray streak 70d, what is this!?

[ Edited ]

Try taking the same photo at different f stops. If it gets worse as the f stop number goes up it's in the light path & may be a scratch on the sensor or a hair in the shutter box etc. The higher the f number the more we see dirt etc on the sensor & directly in front of it.

"A skill is developed through constant practice with a passion to improve, not bought."
Honored Contributor
Posts: 6,420
Registered: ‎08-13-2015

Re: prominent gray streak 70d, what is this!?

It is hard for me to evaluate your shots.  The posted photos appear to have been cropped.  The second photo would seem to have been shot in landscape mode, and the first one in a portrait orientation.  But, the aspect ratios seem off.

 

Dust and dirt on the sensor tends to be small enough to stay in one place.  If you do not have a bub air blower, then I suggest that you buy one, and clean out your camera.  Search YouTube for videos on how to clean a DSLR with an air blower.

 

Do not try to use a solvent to clean the image sensor.  Leave that to professionals with those adjustable magnifying lights.  Do not try to use your mouth to blow on it, either, because of moisture.  Only use an air blower.

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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Valued Contributor
Posts: 493
Registered: ‎12-24-2013

Re: prominent gray streak 70d, what is this!?

[ Edited ]

 Hi " mmriva ",

 

I am guessing it is a hair on your sensor. Sensor dust, hair, etc. shows up more when shooting at small apertures like f/22. It will probably dissappear when shooting at wider apertures like f/2.8-f/5.6 

 

 

Take 3-4 photos at f/22-f/29 and then post them here un-cropped so we can better establish what we are looking at.  Don't worry about focal length or focus distance, all that matters is that it is resonably exposed so we can see it.  Shooting an empty sky is probably the best. 

Mike Sowsun
S110, SL1, 80D, 5D Mk III
Occasional Contributor
Posts: 5
Registered: ‎01-13-2018

Re: prominent gray streak 70d, what is this!?

Yeah I cropped to fit the shot on the message board... maybe this will better show it..Screen Shot 2018-01-13 at 1.56.34 PM.pngScreen Shot 2018-01-13 at 1.56.24 PM.pngScreen Shot 2018-01-13 at 1.56.06 PM.png

Highlighted
Honored Contributor
Posts: 6,420
Registered: ‎08-13-2015

Re: prominent gray streak 70d, what is this!?

Thanks, for posting the clear shots.

 

That is dust, or hair.  You need a bulb air blower to remove it.  They cost less than a large pizza.  Post back with any questions.

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"I don't rent software. I use Photoshop CS6, ACR 9.8 and Lightroom 6.8 ."
Occasional Contributor
Posts: 5
Registered: ‎01-13-2018

Re: prominent gray streak 70d, what is this!?

It goes from F-6, 9, 16, 22

 

I didnt have my tripod so it varies slightly

 

Screen Shot 2018-01-13 at 3.38.07 PM.pngScreen Shot 2018-01-13 at 3.38.16 PM.pngScreen Shot 2018-01-13 at 3.38.24 PM.pngScreen Shot 2018-01-13 at 3.38.32 PM.png

Esteemed Contributor
Posts: 2,260
Registered: ‎11-14-2012

Re: prominent gray streak 70d, what is this!?

It's a piece of hair or a thread etc very close to the sensor OR depending on how you cleaned the sensor a scratch across the filter over the actual sensor.

"A skill is developed through constant practice with a passion to improve, not bought."
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