The celestron regal m2 100fed xlt spotting scope is the next generation of celestrons top performing regal spotting scopes day or night the regal m2 is optimised to provide the sharpest image available and with its fully waterproof and nitrogen purged exterior you can observe your surroundings worry free the extra low dispersion ed glass minimises chromatic aberration whilst the xlt lens coatings maximise light transmission through the optical path for brighter images and increased contra