For photographic correction of the visual field, ASA produced correctors designed by Dipl. Phys. Philipp Keller. ASA correctors, one of the world's top correctors, which are optimized for a bandwidth of 400 to 700nm. Before distribution each corrector is thoroughly tested and measured in the system.
These correctors make
your Newton telescope
to a astrograph.
This corrector corrected
your Celestron, Meade or
perfectly into the corners!
Flat Field and reducer corrector in highest performance!
Correctors for very large CCD sensors.