Technical data
|
Optics |
Pentax 75 apo refractor
|
Focal
Length |
500 mm
|
Focal
Ratio |
f/6.7
|
Exposure
Time |
1 h 40 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
|
2 September 2011
|
Mount |
Kenko NES
|
Tracking |
Lodestar with a small refractor (F.L. 100 mm, aperture 23 mm)
|
Temperature
and
humidity |
T= +7°C, RH=27%
|
Sky brightness at
zenith (with SQM-L) |
22.0 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.
|