Here is an S2/Ha/O3 version of M16 taken using an AP180EDT with a Microline 8300 using Custom Scientific 4.5 nm filters. All subexposures were 15 minutes and the total time was approx 9.5 hours. I need to update the webpage to reflect the true exposure time, as I am aware it says 12 hours (made a mistake when I created the page)