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Baader ASBF 50 AstroSolar ClearWhite Binoculars Solar Filter - 50 mm

SKU: BAD-ASBF-50CW
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Baader ASBF 50 AstroSolar ClearWhite Binoculars Solar Filter - 50 mm Image of Baader ASBF AstroSolar ClearWhite solar filter tipped on its side facing forward and right
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$59.00
 
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To ensure that the solar filter you buy will fit properly, please take a few moments and measure the outside diameter of your telescope, spotting scope or binoculars before you order. Remember, the solar filter needs to fit snugly around the front of the tube assembly that holds the optics. If the filter is slightly larger than its diameter, the filter can be made to fit by the addition of self-stick felt spacers to the inside of the cell. However, if the filter is too small it will not fit, and that would be a shame. So please, measure before you order. Thanks.

Baader ASBF 50 AstroSolar ClearWhite Binoculars Solar Filter - 50 mm

The Baader ASBF 50mm AstroSolar ClearWhite Binoculars Solar Filter is ideally suited for observation of the sun with binoculars (requires second solar filter, not included), as well as for camera lenses. The AstroSolar ClearWhite 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 filter has one side is cut off in order to make it usable on any binocular – even when the bridge is nearly closed. (depending on the binocular type).

Baader's mounted filter line is professionally inspected to ensure your filter provides a pleasant, safe experience. This filter attaches to your binoculars or camera lens with an adjustable three-bolt system, with 13 mm thick, 24 mm long, bolts providing a variable fit. These bolts can secure the filter to the exterior or interior of your optics, giving the Baader ASBF 50 AstroSolar ClearWhite Binoculars Solar Filter an external mounting range of 3.2" - 3.7" and internal mounting range of 2.2" - 2.7" (see Product Attachments for more information on if this range is right for your optic). The adjustment slots are marked, making it easy to evenly adjust the clamping bolts. For added safety, this filter includes a set of three safety straps with adhesive mounting pads.

About Baader AstroSolar ClearWhite Film

The AstroSolar ClearWhite Safety Film OD 5.1 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.

About Baader AstroSolar ClearWhite Mounted Filters

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.

Specifications

  • Filter Size: 50 mm
  • Internal Mounting Clamping Range: 2.2" - 2.7"
  • External Mounting Clamping Range: 3.2" - 3.7"
  • Solar Filter OD: 110 mm
  • Usage: Visual Observation and Imaging
  • Optical Density: 5.1
  • Solar Filter Type: Whitelight