Brand: Antlia

Antlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter (CAK-3NM-WEDGE)

CAK-3NM-WEDGE

Brand: Antlia

Antlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter (CAK-3NM-WEDGE)

CAK-3NM-WEDGE

This Herschel wedge offers unique and interesting views of the suns surface that you can't get with other basic white light filters. It's a great way to adapt an existing scope and start taking photos.
  • Type of build: Herschel 35mm prism
  • Integrated ceramic heat dispersion diffuser
  • Sharp CaK 3nm 393.3nm solar filter screwed into eyepiece holder base
  • High-resolution imaging of granulation, sunspots, and other features
  • Includes a brightness control, a solar finder and effective heat dissipation system
  • Anti Reflection (AR) coated prism and solar filter
  • High blocking specification to reject solar heat ingress
  • Sturdy CNC machined construction
$457.95 CAD

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$457.95 CAD

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Product Description

The Antlia Herschel Wedge is intended for imaging ONLY. It is not suitable for visual observation.

Antlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter

The Antlia Solar Wedge (Herschel Wedge design) replaces the standard prism diagonal at the rear of refractor telescopes to enable imaging of solar granulation and sunspots. The Herschel Wedge design is well known to give sharper, higher-contrast images. The Antlia Solar Wedge design transmits a greatly reduced, safe amount of light to your imaging camera. The image brightness can be conveniently increased or decreased using a control ring with aperture blades, similar to that used in camera lenses.

Our Herschel Wedge is produced using CNC machining and the optical components are multi-coated with anti-reflection coatings to minimize both internal reflections and contrast reducing stray light. The solar wedge incorporates an Antlia 3nm narrow bandpass filter at the Calcium II K-Line centered on 393.3nm and mounted in a standard 1.25’’ holder.

Unlike some other solar wedge designs which may get too hot, the Antlia Imaging Solar Wedge directs energy into an extra thick Polycrystalline Ceramic diffuser plate at the rear of the Wedge. In addition, cooling vents above the ceramic plate facilitate efficient cooling of the system.

The Antlia Cak 3nm solar prism system provides for the safe management of harmful light intensity and heat when imaging the sun. The system is comprised of a prism, Cak lens filter, sun centering finder and a heat dissipation system. The sun’s light passes through the right-angle prism and excess heat is transferred to the rear fins that act as a heat sink for cooling the instrument. This heat management system effectively keeps the the instrument at safe operating temperatures.

Application and Performance

  • Type of build: Herschel 35mm prism
  • Integrated ceramic heat dispersion diffuser
  • Sharp CaK 3nm 393.3nm solar filter screwed into eyepiece holder base
  • High-resolution imaging of granulation, sunspots, and other features
  • Includes a brightness control, a solar finder and effective heat dissipation system
  • Anti Reflection (AR) coated prism and solar filter
  • High blocking specification to reject solar heat ingress
  • Sturdy CNC machined construction

CaK 3nm 393.3nm Filter

The Antlia Solar Wedge prism and internal CaK solar filter are made of heat resistant double-polished substrate. Antlia CaK 393.3nm solar filter uses the most advanced multicoatings to produce a sharp 3nm narrow bandpass, designed to maximize contrast for high-resolution imaging of sun spots, solar surface granulation and other features that are prominent in CaK light.

A high blocking specification of OD5 (0.001%) between 200-1200nm wavelengths and OD3 (0.1%) between 1200-1500nm wavelengths delivers superb resolution for imaging with the Antlia Cak 3nm solar filter. It should be noted that the bandpass for Cak (393nm) makes solar features almost invisible to human vision because of the eye's low sensitivity and poor resolving ability at the CaK frequency. Hence, the Antlia Solar Wedge with CaK filter is not recommended for visual observation. It is designed for imaging with cameras that have spectral responses well beyond human vision.

Never look into the sun with the K-Line filter alone, although you don’t perceive it, there is a lot of harmful UV radiation entering your eye.

Please note:

  • The Antlia Herschel Wedge is intended for imaging ONLY. It is not suitable for visual observation.
  • It is not intended for solar prominence imaging and visual.
  • Must only be used with refractor telescopes to avoid damage to the unit.
  • Refractor aperture must be no larger than 120mm or, focal ratio of F5.5 or longer.
  • Never use the Solar wedge without the supplied narrowband filter. Otherwise irreparable eye damage can result.
  • Disassembly of prism is prohibited and voids warranty. Any repair/returns/exchange for this item is not accepted once it has been disassembled.
  • Warranty guarantee: 1 year

What's in the Box

  • Hardshell case
  • Herschel Wedge

Specifications

Size 1.25"
Wavelength 3nm 393.3nm
Brightness Contro Mechanical Shutter
Blocking ≥OD4.5 @ 300-1100nm

 

The Antlia Solar Wedge prism and internal CaK solar filter are made of heat resistant double-polished substrate. Antlia CaK 393.3nm solar filter uses the most advanced multicoatings to produce a sharp 3nm narrow bandpass, designed to maximize contrast for high-resolution imaging of sun spots, solar surface granulation and other features that are prominent in CaK light.

A high blocking specification of OD5 (0.001%) between 200-1200nm wavelengths and OD3 (0.1%) between 1200-1500nm wavelengths delivers superb resolution for imaging with the Antlia Cak 3nm solar filter. It should be noted that the bandpass for Cak (393nm) makes solar features almost invisible to human vision because of the eye's low sensitivity and poor resolving ability at the CaK frequency. Hence, the Antlia Solar Wedge with CaK filter is not recommended for visual observation. It is designed for imaging with cameras that have spectral responses well beyond human vision.

Never look into the sun with the K-Line filter alone, although you don’t perceive it, there is a lot of harmful UV radiation entering your eye.

Please note:

  • The Antlia Herschel Wedge is intended for imaging ONLY. It is not suitable for visual observation.
  • It is not intended for solar prominence imaging and visual.
  • Must only be used with refractor telescopes to avoid damage to the unit.
  • Refractor aperture must be no larger than 120mm or, focal ratio of F5.5 or longer.
  • Never use the Solar wedge without the supplied narrowband filter. Otherwise irreparable eye damage can result.
  • Disassembly of prism is prohibited and voids warranty. Any repair/returns/exchange for this item is not accepted once it has been disassembled.
  • Warranty guarantee: 1 year

Customer Reviews

Based on 3 reviews
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R
R.
Great, Affordable step into Ca-k imaging

I was pleasantly surprised with how good this filter is. I was a little nervous after reading some negative comments about it but it turns out, the comments were from people that have never used one. I use this on a celestron 102gt ota with a QHY5-III-178M camera. Detail is great and there is good contrast. I have even been able to get very faint prominence a couple of times. At 1/4th the cost of the the other Ca-k filters, it's a great buy. I have also used it to get some daytime Venus images.

G
G.S.
Not the CaK I thought

If you're looking for a CaK chromosphere filter, this isn't it. With a 3nm band, it is effectively a photosphere filter (like a regular Herschel wedge) that provides enhancement around the Calcium K line. To capture those amazing CaK images you see posted you need a 0.24nm filter! All this does is to enhance the faculae on the disk over what you can get with just a regular HW. That's nice, but not what I was hoping for. It's my fault, not Antlia, as they were clear on the 3nm.

B
B.G.

Antlia Imaging Herschel Wedge with 35mm Prism and 1.25'' Cak 3nm Solar Filter (CAK-3NM-WEDGE)

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