What is this?

[gdhugh]

My first venture into learning to shoot the night sky. new to me Canon 5D MkIV and EOS 24-105 f/4.0
Please tell me what the streak is. It appears in every shot but only at night. Can't see it in daylight pics at all.
https://adobe.ly/4qqJGbQ
G.D.Hughes...Wannabe...lots of stuff.
Nothing but always, is never.

 

[Lensmate]

Are you referring to the red flare bit at the bottom of the image, or the satellite line [streak]?

-M

 

[gdhugh]

The red streak at the bottom. Sorry. It's in every night image.

 

[apersson850]

Some reflection? Try taking a photo with same exposure time but with the lens cap on, to rule out reflections from the outside.

 

[gdhugh]

The red streak is in the same place no matter. What can it be? Sensor or lens. I'll try another lens.

 

[Andy01]

The red streak is in the same place no matter.

Even with the lens cap on ?

What can it be? Sensor or lens. I'll try another lens.

 

[Kameratrollet]

My first venture into learning to shoot the night sky. new to me Canon 5D MkIV and EOS 24-105 f/4.0
Please tell me what the streak is. It appears in every shot but only at night. Can't see it in daylight pics at all.
https://adobe.ly/4qqJGbQ
G.D.Hughes...Wannabe...lots of stuff.
Nothing but always, is never.

"Changes in version 1.0.4:
1. Fixes a phenomenon in which a red-colored area may appear at the bottom-center of a captured image when shooting in bulb mode or during a long exposure."

When you update your firmware, make sure that you don't use the latest firmware version 1.5.0 but 1.4.0 instead.

Read the change log to see why.