The attached PDF file contains the original BAA article describing the Watkis spectroscope.
Although originally developed for B&W film, the concept can easily be adapted to DSLR's and CCD.
Read and enjoy!
Attached files Watkisspectro.pdf (937.9 KB)
Watkis transmission spectroscope
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Watkis transmission spectroscope
"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