Suitable for use on all types of telescope; they are made from precision laser cut enforced plexiglass that is stiff and long lasting; they will never be brittle in the cold; unlike some other masks which are made from normal plastics
The masks grip the telescope tube gently but firmly with three metal posts which have non-scratching silicon sleeves to protect valued telescope surface; mask remains centered since 3-post mounting; while fitting a wider range of telescopes
Made from 2mm thick laser cut plexiglass and securing screws are capped with soft plastic so that do not damage telescope; They have adjustment latitude of about 290-340mm that adjustable to fit optical tubes unlike masks which only fit one telescope
Astromania flexible dew shield are constructed of black ABS plastic and are all felt lined for maximum absorption of moisture and baffling of stray light; particularly strong attachment to telescope by non-slip foam rubber at contact area to tube
Height of the dew shield: 345mm; total length: 835mm; suitable for telescope tubes with 229 - 249 mm diameter; prevents telescope optics fogging up; keeps the optics completely dew free and lets to observe for hours with the optimal view