Technical Notes
Quick monitor calibration
Adjust your monitor's brightness and contrast for best results using these simple steps. 
Low cost solar film cell 
The method describes the use of a cheap embroidering frame to mount the Baader AstroSolar Safety film to the telescope's dewcap or objective/corrector cell.


Light box for CCD flats
The use of a foamcore lightbox to obtain quality flat field frames.  Link to the website of the original author of the design.
First light for the RCOS Dual 14.5" Ritchey-Chrétien
This instrument was installed end of 2003 at the Antilhue site in San Esteban, after a commissioning period near Vicuña in northern Chile.
Making flats for large aperture telescopes
A short description on how to achieve good and repeatable flat fields for large instruments.
RCOS Field Flattener for Aries f/9 optics
A before-after analysis re. the effects of the installation of the RCOS Field Flattener/Corrector (FFC) in the optical path of the 14.5" RCOS f/9 system.
Easy installation of the Robofocus electric drive on the large Feathertouch 3.5" Focuser
using the Robobracket and a single screw
TEC Field Flattener for APO 200 FL
A before-after analysis re. the effects of the installation of the TEC FF200 Field Flattener in the optical path of the 8" TEC APO200FL refractor.
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Antilhue 2008 © Daniel Verschatse