Distance 4,100ly, in Sagittarius (per https://en.wikipedia.org/wiki/Lagoon_Nebula)

Telescope configuration: Explore Scientific ED102 FCD-100 Air-Spaced Triplet with the Explore Scientific 3" 0.7x focal reducer (fl=500mm, f/4.7).
Camera: Nikon D5300a (IR-modified). Exposure data: 10 - 30 second exposures at IS100.

Image capture scale: 1.63 arc-seconds/pixel (i.e., un-binned). Field of view (horizontal) = 158.9 arc-min. Image capture on-board camera controls with IR-remote.

Mount: Celestron AVX German equatorial mount (HyperTuned by Deep Space Products), unguided.

Post processing: ImagesPlus 6.5: NEF conversion and calibration, alignment, stacking/combining using 0 dark frames, a 9 bias frame master and 0 flat frames, Sigma Median Reject combined,
DDP, noise reduction in ImagesPlus Image Processing 6.5.
Adaptive Richardson-Lucey deconvolution (5x5 by 5 passes) in IP.

Cropped to final dimensions and resized to 50pct. Final image scale/resolution 3.26 as/p.

20170523_M8_CombSigMed-IPddp-IPadj2-NEBcrv-TPadj2-IPclr.jpg