spot on UM4.6K image

Any one know what this post could be from ? do you think its sensor or lens?

using um4.6k with canon 100-400mm shooting surfing.

Screen Shot 2019-01-19 at 10.17.07 AM by blainesuque, on Flickr

Screen Shot 2019-01-19 at 10.17.12 AM by blainesuque, on Flickr

Screen Shot 2019-01-19 at 10.17.09 AM by blainesuque, on Flickr

Ah yes, that's a dust particle on the sensor. They become especially visible with long lenses and/or small apertures. I recommend you remove it with an air blower such as this: https://www.bhphotovideo.com/c/product/ ... lower.html

Ah yes, that's a dust particle on the sensor. They become especially visible with long lenses and/or small apertures. I recommend you remove it with an air blower such as this: https://www.bhphotovideo.com/c/product/ ... lower.html

Sorry i just realized the photos werent uploaded. See post for the photo examples now. Thanks !

What Ola said.