Brand: Baader Planetarium

Baader Planetarium AstroSolar Telescope Solar Filters ASTF

Brand: Baader Planetarium

Baader Planetarium AstroSolar Telescope Solar Filters ASTF

  • Safe for solar observation and photography with all high-end telescopes and extreme tele-lenses. Suitable for highest magnifications and detailed observation of individual sunspots
  • AstroSolar Safety Film OD 5.0, mounted stress free in temperature compensated cell
  • No astigmatism during winter observation or with temperature changes in summer
  • Scope of supply: ASTF Filter with apertures from 80 to 180mm (200 – 280mm not yet available) come with two sets of centering bolts in 38mm length. 3 bolts with 10mm diameter and 3 bolts with 20mm diameter, adjustable to the tube diameter of your telescope or dew cap. In addition three safety straps with glue-pads and three rubber plugs to cover the holes that are not used, mounting instructions.
$109.95 CAD

Size

80mm 100mm 120mm 140mm 160mm 180mm 200mm 240mm 280mm

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Product Description

Baader Solar Filters provide a professional and secure solution to observe and image the Sun using AstroSolar® Safety Film OD 5.0.

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.

ASTF (AstroSolar Telescope Filter) Baader Solar Filter for high-end Telescopes

This family of solar filters is made in the most elaborate way. AstroSolar must not be put under stress, neither during mounting the film, nor during any temperature change. For this reason the ASTF-Filter features a temperature compensated cell. The film itself is repeatably cemented onto an injection molded ring, whereas the substrate of that ring has the same thermal expansion like the Astro Solar Filter material itself. This free floating film-carrier ring is held onto the aluminum frame with the help of another holding ring made of fiber reinforced plastic – for a maximum of security against breaking of the cell. This temperature compensated cell enables the AstroSolar filter material to retain its excellent optical quality at any temperature – be it -30°C or +50°C.

All Baader Solar Filters feature:

  • Original Baader AstroSolar® Safety Film (OD 5.0), cell mounted and quality inspected by skilled members of our staff
  • Clear white IR-rejecting front ring with reinforcing raised edges along the outer and inner circumference, designed to protect the solar filter material from contact with any sharp metal edge
  • 3 injection molded centering-bolts with threaded brass inserts to center the filter-cell in front of the tube opening. These bolts come in three different diameters, depending on the filter category (ASTF/ASSF/ASBF). Each bolt features injection molded rubber grip-faces, shaped to easily slide onto any telescope tube – but to come off very hard
  • No tool mounting and adjustment of the centering bolts to fit a wide variety of mechanical tube diameters. Bolts made to contact the outside or optional (if appropriate) the inside of the optical instrument tube
  • Non-rotating sliding fasteners made from aluminum that hold the centering bolts. These metal sliders are equipped with a machined indicator to point towards the adjustment index
  • Additional Phillips screws are integrated into the sliding fasteners, so that the centering bolts can be firmly fastened with a screw driver if preferred by the user
  • Index scale provided beside each adjustment slot – adjacent to each sliding fastener, for fast and repeatable adjustment of the filter cell onto different telescope tubes
  • Black sliding washers supplied to securely cover the full length of the adjustment slots in the aluminum frame – for blocking sunlight from passing trough the filter cell beside the filter area
  • Only for ASTF/BDSF-filters: rubber plugs supplied as cover for closing unused adjustment slots in the aluminum frame
  • Three security straps included, to secure the position of the filter cell with Velcro-adhesive pads. A safety feature to absolutely ensure a secure fit in front of the telescope under any circumstances (gust of wind asf)
  • Warning text printed onto the front side of each filter cell: Read the Instructions before use
  • Cardboard gift box fit for safely shipping the filter

    Specifications

     Filter Size 80 mm 100 mm 120 mm 140 mm 160 mm 180 mm 200 mm 240 mm 280 mm
    Manufacturer Baader Planetarium Baader Planetarium Baader Planetarium Baader Planetarium Baader Planetarium Baader Planetarium Baader Planetarium
    SKU (#) 2459310 2459311 2459312 2459313 2459314 2459315 2459316 2459317 2459318
    EAN CODE 4047825032997 4047825033000 4047825033017 4047825033024 4047825033031 4047825033192 4047825033048 4047825033055 4047825033062
    Net Weight (KG) 0.14 0.15 0.17 0.17 0.18 0.21 0.23 0.23 0.25
    Usage Visual solar observation and imaging at high magnification Visual solar observation and imaging at high magnification Visual solar observation and imaging at high magnification Visual solar observation and imaging at high magnification Visual solar observation and imaging at high magnification Visual solar observation and imaging at high magnification Visual solar observation and imaging at high magnification Visual solar observation and imaging at high magnification Visual solar observation and imaging at high magnification
    Astrosolar film AstroSolar Safety Film AstroSolar Safety Film AstroSolar Safety Film AstroSolar Safety Film AstroSolar Safety Film AstroSolar Safety Film AstroSolar Safety Film AstroSolar Safety Film AstroSolar Safety Film
    Optical Density 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0
    Inner Diameter/Clear Aperture 80mm 100mm 120mm 140mm 160mm 180mm 200mm 240mm 280mm
    Outer Diameter 170 190 210 230 250 270 290 330 370
    Filter Mounted? Yes Yes Yes Yes Yes Yes Yes Yes Yes
    Outer Clamping range (10mm Bolts) 110 - 140 130 - 160 150 - 180 170 - 200 190 - 220 210 - 240 230 - 260 270 - 300 310 - 340
    Inner Clamping range (10mm bolts) 130 - 160 150 - 180 170 - 200 190 - 220 210 - 240 230 - 260 250 - 280 290 - 320 330 - 360
    Outer Clamping Range (20mm bolts) 100 - 130 120 - 150 140 - 170 160 - 190 180 - 210 200 - 230 220 - 250 260 - 290 300 - 330
    Inner Clamping Range (20mm bolts) 140 - 170 160 - 190 180 - 210 200 - 230 220 - 250 240 - 270 260 - 290 300 - 330 340 - 370
    Solar Wavelength White light (integral light) White light (integral light) White light (integral light) White light (integral light) White light (integral light) White light (integral light) White light (integral light) White light (integral light) White light (integral light)

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