Tecnosky 1.25" Herschel Prism with ND3 and Polarizing Filter

Tecnosky 1.25" Herschel Prism with ND3 and Polarizing Filter

DESCRIPTION
The Tecnosky 1.25" Herschel prism offers a solid optical and mechanical solution for solar white-light viewing. Its anodized aluminum body includes rear ventilation slits to dissipate the heat from concentrated solar light. The internal optical prism delivers sharp and detailed images of the solar photosphere, allowing clear observation of sunspots (umbra and penumbra), faculae, and granulation.

Inside the prism body, an ND3 interference filter (green coating, 510–550 nm peak) enhances the surface contrast. A circular polarizing filter is also included, which can be screwed onto the eyepiece to precisely control light intensity.

The 1.25" eyepiece holder features an M42x0.75 thread to attach planetary cameras or DSLR bodies directly. This Herschel wedge is suitable only for refractors up to 130 mm aperture. For larger instruments, a 2" version is recommended.

TECHNICAL SPECIFICATIONS
• Type: 1.25" Herschel prism
• Application: white-light solar observation
• Compatible with: refractors up to 130 mm
• Body: anodized aluminum with heat-dissipating slots
• ND3 550 nm filter (integrated)
• Circular polarizing filter (included)
• Eyepiece barrel: 1.25"
• Thread: M42x0.75 for camera connection
• Not suitable for reflector telescopes