This is my first post to Astrobin.  This image features narrowband data of the Eagle and Omega Nebulae regions (M16 and M17) in Serpens and Sagittarius respectively.  I kept a bit more green in the image than may be traditional to better highlight the waves and ridges of gas and dust in this area.  I am pleased with the gauzy "glow" of the OIII cores of the nebulae.  Looking at the image, you can almost visualize the searing UV and higher energy radiation in those cores (especially M17) produced by the massive stars in the central clusters.  One can imagine the surfaces of rocky bodies orbiting those stars must be absolutely bathed in ionizing radiation.  Think about how bright the sun is at noon-day, and then imagine several stars within a few light-years, each with hundreds of times the luminosity of the sun, that has to be a very bright place, and not an environment compatible with our form of life.

Image was acquired from my rooftop in St. Louis, Missouri in a Bortle 7 zone utilizing a Takahashi FSQ-106EDXIV with the 645 QE .72x reducer (operating at 380mm focal length).  Mount is a Paramount MyT.  Camera is the ZWO ASI 6200MM Pro. 

I use Chroma 3nm narrowband filters, and even though the system is operating at F/3.6 I have not noticed any significant bandpass shift or restriction.  It could be there, but if it is, it does not seem to have a deleterious effect on the final image.  I have a theory that while the system is operating at F/3.6, the actual angle of the light cone exiting the reducer may not in fact be as steep as the focal ratio would indicate.  Takahashi claims the reducer produces an image circle of 60mm, yet the diameter of the lenses in the reducer itself are less than 70mm (I should get out my calipers and measure).  This would seem to indicate to me that the reducer has a telecentric effect, and the final lens group in the reducer likely brings the light rays to a more parallel configuration, or at least not as "steep" as the F/3.6 focal ratio would indicate.  Just a theory, would love to see if someone has a ray diagram for the reducer.