Focusing issue

[Brandonb]

I have been trying to photograph deep sky objects however when I get the pictures, the center of the picture is focused but the edges are not. I use a Cannon T6 Rebel, a times 2 Barlow lens with a t adapter and an Orion 150mm StarSeeker. If you know what I’m doing wrong please let me know because I would love to get decent pictures.

[Demonperformer]

Hi, Brandon, and welcome to SGL.

My guess is that, as it is a newtonian telescope, what you are seeing as out of focus is probably coma (the stars look like little comets?). If this is the case, you would need to get a coma corrector, and newt owners could give you a more informed answer on which one than I. Otherwise, maybe post an example which would help us diagnose the problem.

If AP is your passion, do you have a copy of this book?

Enjoy the journey.