What is cause these?

[Earl]

I have circled 3 very strong areas which have some form of effect going on, what is the casue for these?

[Psychobilly]

I'd say...

The one in the middle is a piece of crud in the optical train.. its a fair bit way away from the sensor as its "fuzzy"...

The gradient at the bottom.. I nearly always get that haven't got a clue where it comes from but flats seem to sort it...

Glow in the bottom corner ? If this is with the 450D had you been using liveview?

Peter...

[Earl]

Hi Peter thanks for the input.

Yes these are with my 450D and i do use live view.

[Earl]

Id also like to add the my typing sucks big time !

[jgs001]

I agree about the blob... not sure on the glow along the bottom... but if you're using liveview and firing the exposure with liveview active, then the amp remains on for the entire exposure, and you're getting amp glow.

[RobH]

I agree 100% with Peter....crud in the centre, and the bottom will be sorted out with flats (as will the crud).

Cheers

Rob