|
Technical data
|
| Optics |
Pentax 75 apo refractor
|
| Focal
Length |
500 mm
|
| Focal
Ratio |
f/6.7
|
| Exposure
Time |
2 h 10 min
(single exp of 10 min)
|
| CCD |
Canon
EOS 5D with Baader filter
|
| Sensitivity |
800 ISO
|
| Location |
Tivoli Farm
(Namibia) at 1350 m height
|
Date
|
3 September 2011
|
| Mount |
Kenko NES
|
| Tracking |
Lodestar with a small refractor (F.L. 100 mm, aperture 23 mm)
|
| Temperature
and
humidity |
T= +0°C, RH=41%
|
| Sky brightness at
zenith (with SQM-L) |
22.1 mag/arcsec^2
|
| Notes |
This
image is a collaborative effort of the Namibia 2011 expedition.
Processing: Lorenzo Comolli. Images by: Lorenzo Comolli, Luigi Fontana,
Giosuè Ghioldi, Emmanuele Sordini.
|
