DayStar Filters 2.0Å Calcium II K-Line Quantum Filter (PE-Grade)

BH #DACK2AUNI • MFR #CK2AUNI
DayStar Filters
DayStar Filters 2.0Å Calcium II K-Line Quantum Filter (PE-Grade)
Key Features
  • Highly-Precise Research-Grade Filter
  • Anti-Reflection Coated BK7 Glass
  • High-Sensitivity Tuning for Photography
  • RS-232 Serial Port for Computer Control
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Designed and engineered as a research-grade solar-viewing instrument, Daystar Filters' 2.0Å Calcium II K-Line Quantum Filter is built with anti-reflection coated BK7 glass and highly-precise electronic tuning. The blue calcium k-line is sensitive to magnetic fields, so magnetically-active areas and structures show in high-contrast against the surrounding chromosphere; and this filter reveals complex temporal variations, also in the chromosphere.
Special Order
Expected availability: 2-4 weeks
$6,670.00
$556/mo. suggested payments.*
with 12 Mos. Promo Financing
SAFETY FIRST: Observing the Sun without the proper protection may result in serious personal injury, including permanent eye damage and blindness, and/or damage to equipment. Never point an optic at the sun without an approved solar filter on the front of the optic. For direct solar viewing, viewing the sun through an optic, or when using cameras with an optical viewfinder, ensure your filter is ISO 12312-2 (also written as ISO 12312-2:2015) certified. Never use photographic neutral density filters for direct solar viewing, viewing the sun through an optic, or when using cameras with an optical viewfinder.


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DayStar Filters CK2AUNI Overview

Designed and engineered as a research-grade solar-viewing instrument, Daystar Filters' 2.0Å Calcium II K-Line Quantum Filter is built with anti-reflection coated BK7 glass and highly-precise electronic tuning. The blue calcium k-line is sensitive to magnetic fields, so magnetically-active areas and structures show in high-contrast against the surrounding chromosphere; and this filter reveals complex temporal variations, also in the chromosphere.

Since much solar research is conducted remotely, there is an integrated RS-232 serial port that enables remote viewing of the filter's display and control of its tuning. Its concentration on the K-line makes it ideal for solar photography or remote image transmission due to the sensitivity of many imaging sensors to the K-line. This sensitivity allows imaging systems to resolve the different layers of the Sun's chromosphere at focal ratios between f/15 to f/20. The filter runs on 12 VDC power and comes with a 6' power cord with a set of international outlet plugs for US, EU, UK, and Australia.

UPC: 702730990476

DayStar Filters CK2AUNI Specs

TypeCalcium II K-line
Bandpass2.0 Å
3933 Å
Size1.25" / 3.2 cm, clear aperture
GradeResearch-grade
Multi-CoatedYes
ApplicationSolar viewing
DimensionsDiameter: 3.0" / 7.6 cm
Length: 1.7" / 4.3 cm
Length, with filter mounting plates: 2.2" / 5.6 cm
Weight16.0 oz / 453.6 g
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