Baader Solar filter
ASBF: AstroSolar Binocular Filter 50mm
After 15 years of offering AstroSolar film sheets as DIY-product, this system of Baader Solar Filters™ is designed to retain the true optical quality of the diffraction limited AstroSolar Safety Film.
Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar® Safety Film OD 5.0. Many ready made filters do stretch the filter material like a drumhead in order to make it look like a piece of glass – this absolutely does destroy the image quality, rendering the film useless for high magnification work. AstroSolar must be mounted entirely stress free in order to perform like a high precision planeoptical window. It sounds like a contradiction with traditional perception of quality, but AstroSolar must show slight ripples! Only when the film is being put under stress by an improper cell mount it performs just like any single side coated glass-filter made of untreated floatglass.
This Filter Family is ideally suited for observation of the sun with binoculars (two piece needed), as well as for camera lenses. The AstroSolar filter material is 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. This category is essentially similar to the ASSF in terms of mechanics. The only difference is that one side is cut off in order to make them usable on any binocular – even when the bridge is nearly closed. (depending on the binocular type).
|NET WEIGHT (KG)
|Visual solar observation and imaging
|AstroSolar Safety Film
|INNER DIAMETER / CLEAR APERTURE (MM)
|OUTER CLAMPINGRANGE (13MM BOLTS)
|55 – 70
|INNER CLAMPINGRANGE (13MM BOLTS)
|81 – 96
|Whitelight (integral light)