The variable star Delta Cephei (at right), also a double star just barely resolved here, and the prototypical Cepheid variable star, and with it in the field at left, the star cluster and emission nebula, NGC 7380, aka the Wizard Nebula. All in Cepheus. This is a stack of 8 x 6 minute exposures with the stock Canon 6D at ISO 800, and TMB 92mm apo refractor at f/5.5 with the Hotech field flattener, with no focal reduction. Taken from New Mexico, Nov 11, 2014.
Double Cluster in Perseus, NGC884 and 869 Taken with William Optics FLT110 f/6.5 apo refractor with William Optics field flattener and Pentax 6x7 camera. 30 minute exposure. Taken from home Oct., 1, 2003. Ektachrome E200 slide film. Generous area around central object allows layout of text or design elements in sky around object/ Simulates field of view of large binoculars.
The bright Double Cluster, at bottom, aka NGC 869 and NGC 884, below the large and scattered open star cluster, Stock 2, aka the Muscle Man Cluster, with a chain of stars between them. Stcok 2 is over the border in Cassiopeia. These are obvious in binoculars but less so in a long exposure photo. High haze this night added the natural star glows. The field simulates the field of view of higher-power binoculars. This is a stack of 7 x 8-minute exposures at ISO 800 with the Canon EOS Ra through the Borg 77mm f/4 astrograph, guided with the Lacerta MGEN-3 stand-alone autoguider and dithered, so no LENR or darks were employed. This was on the Mach1 mount. Star spikes added with Astronomy Tools Actions.
