Cheers guys,
I just pointed it at the most obvious thing in the sky to get some results for a first run. I have a 2" filter but it doesn't screw into anything. I have it between the camera adapter and the reducer. It sits in there securely but it's not actually screwed onto anything. I was a bit worried it was back to front
If it ever stops raining I'll have another go. Maybe next year by the looks
