Anomaly on raw images

[woodypower]

HI

Does anyone have any idea what the grey smudgy area in the centre of the image could have been caused by?

It appears on all the images of the Leo triplet,  taken on my modded canon 250d.

I have checked the sensor and its clean, and collimation was confirmed with a laser.

 

Condensation on the secondary mirror?

 

Skywatcher 300PDS, X0.9 coma/reducer and the canon.

 

Thanks

[michael8554]

Sorry woodypower, I'm don't understand your image.

I see a grey landscape image with a central inset red portrait image.

Is it the red image you want help with ?

Is this an actual image or a screen shot ?

All I see is patterning that may be due to a screen shot.

Post a JPG version of the image you want help on.

Michael