Thanks Suavi. The Quattro is turning out all right. The mirror still flops around too much so need to secure that a bit better but other than that I’m loving the f4 speed, carbon fibre resistance to the cold/shifts in focus, and (mostly) the diffraction spikes! Also seems a good match in regard to focal length/pixel size for the ASI1600MM-Pro. I was hoping winter would bring abundant clear skies to QLD, but seems it might be as bad as the summer :-/
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