A telephoto lens image of the globular cluster Messier 3 in Canes Venatici. This is shot to simulate the field of view of binoculars for illustration purposes. The faint globular cluster NGC 5466 is at far left. This is a stack of 6 x 1-minute exposures with the 200mm lens at f/2.8 and Canon 6D MkII at ISO 800, tracked but unguided on the Mach 1 mount, on April 28, 2019.
M4 (at right) and NGC 6144 (upper) globular clusters with Antares. Taken with 4-inch AP Traveler apo refractor at f/4.5 with Canon 20Da camera at ISO 800 for stack of 4 x 5 minute exposures. Taken from Coonabarabran, NSW, March 27, 2007.
Antares and M4. Taken with Borg 77mm astrographic refractor at f/4.3 and Hutech-modified Canon 5D for stack of 5 x 8 minute exposures at ISO 400. Taken from Coonabarabran, NSW, Australia, April 18, 2007.
