Cygnus Tail Region

540mm/F5.1 telescope
Pentax 67
Konica Centuria 400Pro color negative
4-frame mosaic
85-minute exposure on each frame (340 min total)
more details in <a href="http://www.astrobin.com/79409/" rel="noreferrer nofollow">www.astrobin.com/79409/</a>