M16, aka NGC 6611, aka the
"Eagle Nebula", was made
famous by the iconic image from
the Hubble Space Telescope
entitled "The Pillars of Creation".

M16 is located in the
constellation Serpens ("the
serpent") nears the borders of
Serpens, Scutum, and
Sagittarius.  It is estimated at
8000 lightyears distant.

This image was processed from
data obtained over 8 years with
different cameras. To render an
image in the so-called "Hubble
palette" requires 3 narrowband
filters -- it was only in 2016 that
a new filter wheel in our Chilean
observatory had room to accept
an SII filter!
16" RCOS @ f/11.3

H
ubble palette (SII-Ha-OIII)

Apogee U47 in 2008:
4 hours Ha, 4 hours OIII

Apogee U9 in 2010:
8 hours Ha, 8 hours OIII,
2.5 hours/channel RGB

FLI Proline 16803 in 2016:
7 hours SII

Data acquired at CTIO
using ACP

Processed with CCD
Inspector, Maxim,
PixInsight, Neat Image, and
Adobe Photoshop.
    M16 -- The Eagle Nebula
    Click on image to enlarge