A little help please

[JKB]

Took this shot last night of Vega, just as a test really.

There appears to be a gap in the halo lower left. Is this a collimation issue or where the focuser lies in the tube or just my bad focusing?

I know it's not the best photo but wondered if anyone could shed some light on it please.

Thanks

Jamie

[jnc71106]

I had this on one of my pics as well so would like to know also

Jake

[roundycat]

It is almost certainly an artefact caused by the clips that hold the lens elements in place. You can see them if you look down the front of the ota.

Dennis