[avandonk]

Thanks all. Mike I have not collected any HA yet but I think it would ruin the balance and maybe obscure the dark or dusty nebs. I wanted to keep Barnards Loop in the centre to dodge any vignetting. HDR is a whole new game and any further HA or O3 would have to be collected the same way.

I think we are all to used to images that are stretched to unrealistic intensity levels. Whilst this adds to the clarity of the image it tends to lose either the very faint or the bright intensity information and at 12 bits would not even be recorded. You either get the faint stuff and lose the bright information or the bright stuff and the faint information is lost in the noise.

Leon the Canon 85mm F1.8 is as good as any L series lens in image quality. It does not qualify as one as it is not dust and moisture proof. It is one of Canons best kept secrets and is only (gulp) $600 Aus.

I am just having fun experimenting and sharing anything that might help others with their imaging. I know that I have learnt a lot from others.

Bert