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Herschel-Wedges will be used to observe the sun in White-Light. Around 95% of the sun light will be suppressed by the Herschel Wedge. The remaining sun light will be dimmed by a fix installed ND3.0 grey filter. Lunt Solar Systems Herschel-wedges are installed in a fully closed housing with integrated heat trap. There is no stray light escaping, therefore it is very safe.
The difference between Herschel-wedges and normal front mounted filters is, that the filtering takes place just before the eyepiece or camera. This will provide a better contrast and sharpness of the solar image.
Furthermore there is more safety at a Herschel-wedge than at a front mounted filter. A Herschel-wedge can not rip or become holes like a foil. And also it can not drop down from the telescope objective accidentally.
Only for use with refractor telescopes up to 150mm aperture:
Because the full energy and heat of the sun will be inside the telescope, we advise to use only refractors with a Herschel-wedge. The refractor must not have corrector lenses at the back. Optical elements like corrector lenses, or secondary mirrors of reflector telescopes, become very hot by the concentrated solar energy and could be damaged.
Tuning the brightness:
Because the Herschel-wedge produce polarized light, you can use a normal polarizing filter at the eyepiece or camera-adapter. By turning the polarizing filter the brightness will be reduced.
Polarizing filter not included. We recommend the BRESSER 2" polarizing filter BR-4946465.
• For refractor-telescopes up to 150mm aperture
• Connection to telescope: 2"
• Connection to eyepiece: 2"
• 90° housing like star-diagonal
• Especially high-quality optical surfaces for very good contrast
• Fully closed housing with integrated heat trap
• No stray light escaping - therefore it is very safe
• The needed ND3.0 filter is fix installed
Delivered by order:
• Herschel-wedge for 2" focuser
• Integrated ND3.0 filter
• Instruction manual
Customer ratings and reviews
LUNT LS2HW 50.8mm (2") Herschel-wedge