The Messier star cluster M38 at left, with the smaller NGC 1907 cluster below, amid a complex field of nebulosity in central Auriga, including from left to right: IC 417 (at bottom), IC 410 (lower right), and IC 405 (at upper right), aka the Flaming Star Nebula. This is a stack of 6 x 6 minute exposures at ISO 800 with the filter-modified Canon 5D MkII, and through the 92mm TMB apo refractor with the Borg 0.85x flattener/reducer for f/4.5. Mounted on the Sky-Watcher EQ6-R mount for testing. Taken on a -10° night on January 4, 2018 from home. Guided with the Starshoot auto-guider run by PHD2 on the Macbook. Diffraction spikes added with Noel Carboni’s Astronomy Tools actions.
M39 with 101mm Borg apo refractor at f/4.1 and Canon 20Da camera at ISO800 for stack of 4 x 5 minute exposures. Taken on a very warm night in July 2007. Taken with HEQ5 mount autoguided with ST402.
M39 open cluster in Cygnus. Taken Oct 30, 2010 with 105mm A&M apo refractor at f/5 with Borg .85x flattener/reducer and Canon 5DMkII at ISO 800 for stack of 5 x 10 minute exposures, Median combined. Used Celestron CGEM mount and NexGuider on William Optics 66mm guidescope. All seemed to work well.
