Jupiter and Venus were close enough on the evening of March 12th, 2012 to fit inside the field of my 300mm lens. I employed a somewhat unknown method to produce the diffraction seen here. I stopped the lens down from full aperture and made the exposure. Equatorial tracking was employed.
Pentax Spotmatic II with the 300mm F/4 SMC Takumar @ F/8 5 minutes exposure on Kodak Gold 100.