This is 7x1200" with the SXVF-H9 through an Astronomik 6nm Hα filter and the ONTC_Synta Newtonian at f/4.95. This has always been one of my favorite targets. One of the neat aspects of this image is that the seeing was so good that the resolution of the sky was better than the 1.32"-per-pixel resolution of the imaging system; this image is undersampled and some of the stars are square. It was an amazing night. Seeing was nearly as good while I shot NGC 5585, posted below, with the CLS filter; to an extent, the Hα filter takes best advantage of good seeing.
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