Surplus shed is having a 45% off sale today.....
http://www.surplusshed.com/pages/item/l9113d.html
At that price these prisms look VERY interesting to anyone who wants to make their own Herschel wedge.
Surplus Shed Herschel wedge prisms???
- Merlin66
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Surplus Shed Herschel wedge prisms???
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
https://groups.io/g/astronomicalspectroscopy
http://astronomicalspectroscopy.com
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer