Baader ASSF Filtres solaire pour longues-vues AstroSolar OD 5.1 – ClearWhite (Ø 50 mm - 150 mm)
Description
Observation et photographie solaires en toute sécurité avec toutes les longues-vues, les télescopes d'amateur et les objectifs d'appareil photo
Film de sécurité AstroSolar® OD 5,1 – ClearWhite, monté sans contrainte dans une cellule de haute qualité
Contenu de la livraison : les filtres ASSF (ouvertures de 50 à 100 mm) sont fournis avec trois vis de centrage de 13 mm de diamètre et 24 mm de hauteur, réglables en fonction du diamètre du tube de vos jumelles. Les kits ASSF 115 et 130 sont fournis avec trois vis de centrage de 10 mm de diamètre et 38 mm de longueur. Sont également fournis trois sangles de sécurité avec pastilles adhésives et une notice de montage de 32 pages.
Conforme aux exigences de transmittance applicables de la norme EN ISO 12312-2:2015 pour les filtres destinés à l’observation directe du Soleil.
Baader Solar Filter – ClearWhite
Mounted filters with Baader AstroSolar® ClearWhite Safety Film OD 5.1
Baader Solar Filters provide a safe way to observe and photograph the Sun with AstroSolar® ClearWhite Safety Film OD 5.1 in the best possible quality. In many homemade filters, the filter material is stretched tightly to make it look like a glass filter. However, this reduces the image quality and makes the filter unusable for higher magnifications. AstroSolar® Safety Film must be mounted absolutely tension-free in order to act like a high-precision plane-polished optical window. Although this appears to contradict the usual perception of quality, AstroSolar® must show slight waves. Only when the filter material is exposed to tension due to an inadequate holder does it perform no better than a simple glass filter made of optically untreated window glass.
Clear white solar image with high optical quality
The new Baader AstroSolar® ClearWhite Safety Feuille OD 5.1, 100x50cm (various versions available) is a high-quality, double-sided metallized solar filter film designed for direct solar observation as well as for constructing front-mounted objective filters for telescopes, binoculars, spotting scopes, and camera lenses. It was developed to provide a particularly neutral, clear white solar image. Undesirable bluish or orange color casts, which may occur with simpler solar filters, are largely avoided.
The film has an optical density of OD 5.1 and reduces the intensity of sunlight by approximately 99.9992%, corresponding to a reduction factor of about 125,000. It complies with the applicable transmittance requirements of EN ISO 12312-2:2015 for filters intended for direct observation of the sun.
The film is manufactured from a special streak-free and bubble-free substrate and achieves an optical quality comparable to high-quality plane-parallel glass filters despite a thickness of only 0.012 mm. The material is not ordinary “Mylar” and was developed for exceptionally high uniformity and optical purity.
The double-sided coating ensures especially uniform filter performance and reduces the effect of isolated microscopic irregularities in the metallization. A single layer of AstroSolar® ClearWhite Safety Film OD 5.1 is sufficient to produce a safe solar filter with excellent image sharpness.
ASSF (AstroSolar® Spotting Scope Filter) ClearWhite – Baader Solar Filter for Spotting Scopes, amateur telescopes and camera lenses
This family of filters offers a stable and rigid solution for all spotting scopes, tele-lenses and amateur telescopes, with magnifications up to 120x. The AstroSolar® filter material is likewise mounted onto a plastic ring whereas the plastic ring itself works as stabilizing element for the filter cell. This still plastic ring is mounted onto the aluminum front frame. The thermal expansion coefficient of the plastic and the film are similar.
Included: ASSF Filter (Apertures 50 to 100mm) come with three centering bolts of 13mm diameter and 24 mm height, adjustable to the tube diameter of your binocular. ASSF 115 and 130 packages come with three centering bolts of 10mm diameter and 38mm length. In addition three safety straps with glue-pads and 32-page instruction manual.
