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A detail of the central part of IC 1396
nebula, in Cepheus. The dark nebula in the center is vdB142. This image
is the first of a collaboration with Daniele Cipollina,
using as luminance my H-alpha images from the Schmidt camera + ccd, and
as color data Daniele's images from AP102 and Canon EOS 350D
(modified). The two above are different elaborations from the same
data: let us know which you prefer!
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| Optics | L: Schmidt
camera 400/300/615 (Zen optics) RGB: AstroPhysics 105 EDT with original field flattner |
| Focal Lenght | L: 615 mm RGB: 661 mm |
| Focal Ratio | L: f/2,0 RGB: f/6.3 |
| Exposure Time | L: total 4h30m. 27 frames of 10 min
each RGB: total 3h20m. 20 frames of 10 min each - 800 ISO |
| CCD | L: a camera with Kaf-6303e RGB: Canon EOS 350D (modified Hutech) |
| Sensor | L: Kaf-6303e class 1 RGB: Canon cmos |
| Filters | L: H-alpha 6nm
Astronomik, selected for f/2 RGB: none |
| Sensor temperature |
L: -30°C RGB: ambient |
| Location | L: Tradate
(VA,
in Pianura
Padana, Italy) at 300m height RGB: Pallavicino (AL, Val Borbera, Italy) - Rifugio Baita Piani di San Lorenzo at 1150m height |
| Date |
L: 21 october 2007 RGB: 19 september 2006 |
| Mount | L: Astrosystems
fork mount RGB: Marcon MB-50 |
| Tracking | L: Webcam
Vesta
Pro B/W on a 120mm f/13 refractor reduced at f/5 RGB: ST4 on a 90/1000 Vixen refractor |
| Temperature and humidity | L: T=+12°C, RH=70% RGB: T=+13°, RH=50% |
| Sky brightness at zenith (with SQM-L) | L: 18.5 - 19.0 mag/arcsec^2 |
| Notes | Authors: Lorenzo Comolli (luminance) and Daniele Cipollina (colors) |
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