Taking Flats with a DSLR

[Carole]

I guess this is a test

Yes Chris, just to see if the image is still off centre with the drawtube pulled in.  I know you need to do proper flats at the same focus. same optics etc etc. 

Will report findings.

Carole

[Rocket Pooch]

ok

[Carole]

It occured to me that the dome of my POD is white and shows the light through

OK, the results of my experiment shows that flats through the dome do work. It also shows that the centre of the image is still slightly off centre even with the drawtube completely closed.  So that narrows it down a bit, not quite sure where I go from here but I have guiding to sort out as the main priority. 

I am going to check flats "through the dome" again at normal imaging focus and make sure they work OK as well. 

Carole 

[mickw]

Carole, if your image is still off centre there is something not quite right.
It may be that the camera is not sitting central in the draw tube.

If you take an image - flat or whatever then rotate the camera 180 degrees, if the offset switches to the other side of the image, that would confirm whether or not the camera fixings are the problem.

[Carole]

Good idea Mick, will give it a try.

Carole