Astroart Forum

Hello.

When i use the full frame autofocus, the images acquirted show elongated stars along the process.
Anyway, the final focus seems to be correct. Is this normal? I guess not!

Thanks.

David Cejudo.

That never happens when I focus. Do you have guiding active when you focus? If yes pause the guider and see if that helps.

Hello.

No. Guiding is not active.
Besides, if i get a single image just before or after focus, the image is perfectly normal with round stars!

Kaban wrote: ↑

15 Sep 2024, 00:32

Hello.

No. Guiding is not active.
Besides, if i get a single image just before or after focus, the image is perfectly normal with round stars!

Is your mount polar aligned?

My mount sits in an equatorial wedge very well aligned.
Even if i do not use guiding, any shot shows round stars even with long expositions.

Just before focus i usually acquire a simple image a few seconds long that looks fine.
Besides, the Full Frame autofocus uses 4 seconds shots.

Also, the camera is well aligned to the north but those elongated stars are slanted.

David Cejudo.

Have you checked all the connections between the camera and scope especially the focuser ? Maybe just a lose connection that flexes during auto focus.
Good luck