ANTLIA Dual-band ND Filter Dual ERF H-Alpha & Cak/CaH Solar Neutral Density Filter Astronomical Accessory
Couldn't load pickup availability
Specifications
Brand
Product type
Technical specs
Design and durability
ANTLIA Dual-band ND Filter Dual ERF H-Alpha & Cak/CaH Solar Neutral Density Filter Astronomical Accessory
Features:
Dual-band 25nm H-Alpha & CaK & CaH Line:
- It adopted the latest process design with high transmittance, high cutoff, and flat top optimization, as well as advanced coating technology to ensure the accuracy of its wavelength.
- T > 95% at H-Alpha, FWHM 25nm
- T > 90% at CaK & CaH, FWHM 25nm
Blocking: 200-1700nm:
- The ultra far design of UVIR cutoff, due to the strong solar energy, Antlia's coating range is wider, from 200-1700nm, which more blocks the solar energy in the infrared band, with OD4 (0.01%) at 300-1200nm out of band barrier design, designed for safety considerations.
1/4 λ Quartz Substrate Production:
- The Antlia Dual ERF H-Alpha/CaK/CaH Solar Filter uses quartz substrate after secondary double-sided precision polishing with 1/4λ waveform, it has better thermal stability, lower glass expansion coefficient, and a denser film layer, which is not easily affected by the environment and has a longer service life, while 1/4λ waveform ensures that, when paired with professional solar observation equipment, the impact of surface shape on image quality and wavelength on the image is minimized.
Package Included:
- 1 x ND Filter
- Businesses may need to employ various types of legal pages on their websites or mobile apps. Some, like Privacy Policies, are required by law, while others, such as a Terms and Conditions agreement (T&C), are not. Regardless of legal demands, you may find that your company needs one or more legal pages for compliance and optimal operation.
- In this article, we will go over the most common legal pages, walk you through a summary of what each requires, and explain why you may need it. In addition, you'll find a sample template for each type of legal page so you can quickly get started writing your own.
If you have any questions about this product, please let us know by filling out the form below, and we will contact you as soon as possible.