IC5070 - The Pelican Nebula (SII:Ha:OIII)

18:40 22/9/2008 UTC

At last I could do the SII to this project. I was a bit surprised how much signal I got. This is a very nice target for narrowband filters, but could also use some more exposure time to get decent SNR to work with. However it resembles some nice work others have done with CCD's, but still not even close... DSLR is just not that sensitive and free of noise. This time I was monitoring the progress of the imaging session from inside using Wireless LAN. And also, this is the first light for my Unihedron Sky Quality Meter: My backyard background sky brightness was 19.83 magnitudes per square arcsecond. Quite nice, but not dark.

Camera: Modified Canon EOS 350D | Telescope: Skywatcher ED80 Pro 80mm f7.5 refractor, William Optics 0.8x focal reducer | Mount: Vixen GP-D2, Boxdoerfer PowerFlex MTS-3SLP drive controller | Filters: Astronomik H-alpha 13nm 2", Astronomik OIII 13nm 2", Astronomik SII 13nm 2", Astronomik EOS L UV/IR Insert Filter | Guiding: , The Imaging Source DMK 21AU04.AS CCD camera, Orion ShortTube 80mm f5 refractor, Stark-Labs PHD Guiding | Exposure: Ha: 9x600s (1h30m) ISO800 f6, 17 darks, 10 flats, 0 bias; OIII: 8x600s (1h20m) ISO800 f6, 17 darks, 10 flats, 0 bias; SII:9x600s (1h30m) ISO800 f6, 17 darks, 10 flats, 0 bias; | Software: Stark-Labs Nebulosity 2 | Location: 60°31'N 26°52'E (Koivula/Kotka,FI) | Background sky brightness (SQM): 19.83mag/arcsec²