Please note: This text was taken directly from the manufacturer.
Designed to fit snugly over the aperture of your telescope, these optical glass filters block 99.999% of incoming sunlight, allowing you to safely observe sunspots and solar granulation in the Sun's photosphere. The Sun appears in a natural, whitish color. The glass elements are machine-polished and triple-coated with nickel-chromium stainless steel for a scratch-resistant surface. Each filter has three nylon thumbscrews to ensure a snug fit to the front of your telescope or binocular. The thumbscrews complement the press-fit foam lining inside the filter's durable aluminum cell to accommodate diameters up to ﾼ" smaller than the nominal size. A tight press fit is still required for safe solar viewing. Lifetime limited warranty.
Commento del nostro esperto:
Il filtro solare è adatto per esempio ai telescopi Skywatcher N150/750, N150/1200, Omegon 150/750 EQ-3, Omegon 150/750 EQ-4 o Skywatcher e Orion 6" Dobson. Per i telescopi Omegon è necessario estrarre l'inserto in gommapiuma ed eventualmente sostituirlo con uno più sottile.
Il diametro interno del filtro è di circa 186 mm. Con l'inserto in gommapiuma si arriva a circa 182 mm.
(Marcus Schenk)
