Quote:
Originally Posted by Peter Ward
I'd also comment imaging at +3000 mm focal length is hard....so much conspires to ruin your efforts, but I'd invite all astro imagers to move away from the cosy sub 1000mm zone and push the envelope...you may be surprised at the results 
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I’m sure imaging at such long focal length is not an easy task. I’m also sure that nearly every amateur would love to move away for cosy shortish focal lengths, but unfortunately quality DSO imaging at 3000mm+ requires an investment in excess of $50k, which for most is a bit too much to take sharper but still just pretty images.
Thank you for the invite nonetheless