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HERSCHEL WEDGE FOR SOLAR OBSERVATION
What is a herschel wedge?
A Herschel wedge is an optical prism used in solar observation to refract most of the light out of the optical path, allowing safe visual observation. It was first proposed and used by astronomer John Herschel in the 1830s.
The prism in a Herschel wedge has a trapezoidal cross section. The surface of the prism facing the light acts as a standard diagonal mirror, reflecting a small portion of the incoming light at 90 degrees into the eyepiece. The trapezoidal prism shape refracts the remainder of the light gathered by the telescope's objective away at an angle.
While the prism is constructed of special glass which absorbs UV and IR light, it cannot be used with a Reflecting telescopes designs such as SCT's Newtonians and MAK's. This is because reflecting telescopes usually have a secondary mirror close to focus which may be damaged by the heat caused by IR light. This concentrated IR, in particular, can crack or unglue optical elements in a telescope, especially those located close to the focal plane, resulting in serious injury to the eye or possible blindness.
Starfield Optics Herschel wedge for solar observation are available in 2" and 1.25" designs.
2" Herschel Wedge for solar observation
The Starfield Optics 2" Herschel solar wedge transforms how you can observe the sun's surface including sun spots and surface detail
The solar wedge easily attaches to your refractor telescope, replacing the standard 2" mirror or prism diagonal. The solar wedge is imaging-ready since you can fine tune the image brightness without needing to remove your camera.
Solar wedges, compared to traditional film solar filters, are known to give you a higher-contrast image because it removes all reflections between the filter and telescope lens.
The sun can be safely observed with the Starfield Optics Herschel wedge. Brightness can be adjusted by twisting of the 2" polarizing filter by rotating the 2" eyepiece holder.
Get ready to see sun spots and solar surface granulation like never before!
Key Features
- Visual and imaging use
- Built in ND3 filter
- Polarizing filter provides a wide brightness adjustment range
- 115mm optical back length allows for use with most refractors
- Anti-reflection coated prism
- 46mm clear aperture
- 2" twist lock ring allows for fast accessory changes
- includes 2"-1.25" adapter
1.25" Herschel Wedge for solar observation
Embark on a captivating solar observing journey with the Starfield 1.25" Solar Wedge. Designed for amateur astronomers and astrophotography enthusiasts, this high-quality solar wedge offers a unique window into the dynamic surface of the Sun.
While offering exceptional views, it's primarily suited for refractor telescopes up to 4" and may not be compatible with all telescope models. For telescopes larger than 102mm / 4" we recommend our 2" Solar wedge model.
Key Features
- Versatile Application: Perfect for both visual and photographic exploration of the Sun.
- Simple Setup: Easily attaches to refractor telescopes, replacing standard prisms or diagonals.
- Superior Optical Quality: Anti-reflection coated prism ensures high-contrast, detailed solar views.
- Integrated Filters: Adjustable CPL filter for safe, comfortable solar observation.
- Photography-Ready: M42 threads facilitate straightforward camera attachment.
- Optimized Aperture: 26.5mm clear aperture for enhanced light capture.