Mark on images at f11 and above

[BexD]

Hi,

 

ive noticed when I shoot at F11 and above there is a line ( like a hair) on the images. I’ve changed lenses so it’s camera not lens.

what could it be and how can I fix?

 

thanks, 

[Damien Symonds]

Hi @BexD I'm sure Brian would like to see it.

https://www.damiensymonds.net/2013/09/grabbing-700x700px-100-crop.html

[Brian]

I’m out exploring the US at the moment, and cell coverage is spotty. So I can really reply this Saturday. 
 

Anyway, most dust / hair / dirt appears at f/11 or f/16. Does your camera have a cleaning mode? What make/model is it and do you have something like a Rocket Blower to blast some shots of air at your camera’s sensor. 
 

Let’s see some images in question first. 

[Brian]

Oh, here is the Rocket Blower (Medium) that I’m referring to.