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User Manual for Alpine Astronomical 120mm Baader AstroSolar BDSF 3.8 White-Light Digital Solar Filter for Telescopes Click to enlarge the picture
Contents of the user manual for the Alpine Astronomical 120mm Baader AstroSolar BDSF
- Product category: Solar Filters for Astronomical Telescopes Alpine Astronomical
- Brand: Alpine Astronomical
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Alpine Astronomical Solar Filters for Astronomical Telescopes
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User manual for the Alpine Astronomical 120mm Baader AstroSolar BDSF contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Alpine Astronomical product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Alpine Astronomical user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Alpine Astronomical product will considerably shorten its lifespan!
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Product description A Buying Guide for Solar and Solar Eclipse Viewing Read More tavaerrf Unlike many white-light solar filters that produce views of the sun with a red-orange, bluish, or yellow tint, the Alpine Astronomical 120mm Baader AstroSolar BDSF 3.8 White-Light Digital Solar Filter reveals the sun in its natural white color. With an optical density of 3.8, this iteration is specifically designed for digital imaging of the sun and all phases of a solar eclipse through an optic like a telescope or extreme telephoto lenses — showing more surface details with greater clarity versus other types of solar filters. The filter is mounted onto a clear-white IR-rejecting plastic ring, which acts as stabilizing element for the filter cell, and the ring is in turn mounted onto the aluminum front frame. The thermal expansion coefficient of the plastic and the film are similar to minimize thermal stress on the film for increased resistance to developing pinholes or tears.With the ability to be installed on the outside or inside of an optical tube assembly, dew shield, or corrector plate retaining ring, this filter provides a safe way to view the sun through conventional nighttime telescopes. Recommended for apertures from 110-130mm, the filter is engineered with three centering bolts that can fit OTAs, dew shields or corrector plates with an outside diameter of 140-180mm, or an inside diameter of 170-210mm. Due to the shallow depth of the corrector plate on most catadioptric OTAs, for secure and safe use Alpine Astronomical only recommends outside mounting on Cassegrain-style telescopes.This filter is only intended for digital imaging of the sun, and is not safe for direct solar viewing or for use on cameras with an optical viewfinder. Only use on cameras with an electronic viewfinder (EVF) or Live-View option. If you do not know what kind of viewfinder your camera has, do not use this filter. - Fit
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- For the correct fit, measure the outside or inside diameter of the dew shield/lens housing - including hardware like retaining rings and screw heads — and choose the size that matches the measurement with some extra room
- When used on Schmidt-Cassegrain, Maksutov-Cassegrain, or other catadioptric OTAs, outside mounting is required as the limited depth of the front inside diameter prevents full and secure engagement of the centering bolts
- Recommended for 110-130mm apertures
- 170-210mm inside diameters
- 140-180mm outside diameter
In the Box Alpine Astronomical 120mm Baader AstroSolar BDSF 3.8 White-Light Digital Solar Filter for Telescopes 3 x Screws 3 x Washers 3 x Centering Bolts 3 x Rubber Plugs 3 x Safety Straps with Adhesive Pads Limited 2-Year Warranty Solar and Solar Eclipse Viewing 101 Christopher Witt 12/14/2016 Mark Your Calendars: North American Solar Eclipse 2017 Todd Vorenkamp and Christopher Witt 08/19/2016 Clamping Range Filter Chart PDF 307.4kb Table of Contents
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Technical parametersAlpine Astronomical BDSF-120 Specs | Bandpass | White-light, broadband | | Clear Aperture | 120mm | | Diameter | 210mm | | Weight | 5.5 oz / 155.0 g | | | | Package Weight | 0.85 lb | | Box Dimensions (LxWxH) | 10.1 x 9.8 x 1.3" |
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