Large and loose open cluster in Ophiuchus, IC 4665, in a wide-field image simulating the field of binoculars. Taken July 24, 2012, from home with the Canon 5D MkII at ISO 800 and Canon L-series 200mm lens at f/3.5 for a stack of 5 x 3 minute exposures.
IC 4756 and NGC 6633 S-O Double Cluster, taken Aug 15, 2007 from home. Stack of 3 x 4 minute exposures at ISO800 with Canon 20Da and 135mm L-lens at f/2.8. Field equals 7° bino field. Slight trailing (not guided).
The Iris Nebula (NGC 7023), a bright reflection nebula set amid clouds of dark yellow-brown dust in Cepheus. The bright red star at left is T Cephei. The smaller reflection nebula at far left is vdB 14. North is up in this framing. This is a stack of 18 x 12-minute exposures with the SharpStar 94mm EDPH refractor at f/4.5 and with the Canon Ra at ISO 800, and through an Optolong L-Pro broadband filter. A generous application of luminosity mask curves in Photoshop generated with the Lumenzia panel brought out the faint dusty tendrils from the background sky. An application of Star XTerminator filter reduced the stars to also help accentuate the dusty clouds. Autoguided with the MGEN3 with dithering; no LENR or dark frames employed. Taken from home Nov. 2/3, 2021.
