OPTOLONG LRGB FILTERS Size:36mm which comprises the periodic irregularities

which comprises the periodic irregularities due to imperfection in the manufacturing and assembling of the worm

25" barrel

Length 670 mm

the Veloce Series has a fix focal position versus temperature shift during imaging sessions

OPTOLONG LRGB FILTERS Size:36mm which comprises the periodic irregularitiesOptolong LRGB filters are specially designed for deep space photography with monochrome cameras. The strict manufacturing process and the quality control guarantees a tight tolerance of the filter thickness ( 0. 05mm) which makes these filters parfocal. This allows the filter change without the need to significantly refocus. Each filter is fully multi coated to minimise internal reflections, halos around stars and to assure a high transmission which