* Red, Green, Blue, and L (UV & IR-Cutoff) Filter set mounted in 2" (50.8mm) cells.
* Each filter blocks the IR, no additional filter necessary
* Transmission of nearly 100%
* Coatings protect amazingly well against scratching, aging, and humidity.
The transmission curves of the Astronomik RGB filters are optimised for CCD astronomy.
Continuum radiators like stars and galaxies as well as objects that shine only in single lines (e.g. planetary nebulas), are reproduced in their true colours.
Because of the design of the band pass of the filters, the colour sensitivity of the human eye is optimally reproduced.
You get CCD pictures that show objects in their optimal colours, just as if you would see it if your eyes were sensitive enough.