The heatwave continues in the UK and as a result seeing and transparency just aren't as good as in cooler weather. While this is a hinderance for larger aperture scopes, this makes no difference to the Coronado double stacked 40mm. What it loses out in terms of aperture it makes up for with it's tight bandpass in terms of the detail it produces. This shot was taken at f20 (800mm fl) and is a 6 pane mosaic taken with the DMK31.
