Merlin66
22-02-2007, 08:14 AM
There may be some interest out there.....
I've just finished building a star spectroscope based on a transmission grating from Hawksley, a 3 degree wedge prism from Edmund and a cylindrical lens from an old project.
The grating and prism form a "GRISM" and the cylindrical lens widens the spectrum for visual.
Whole thing mounted in a nylon machined block, fits 2" focusser and can accept a webcam.
Total cost: less than $110 compared with the ones out of the US at $300 plus.
If anyone wants more constructional details, drop me a PM.
I'll post some photos later.
ps Seems like they've found another Nova in Scorpius!!!
I've just finished building a star spectroscope based on a transmission grating from Hawksley, a 3 degree wedge prism from Edmund and a cylindrical lens from an old project.
The grating and prism form a "GRISM" and the cylindrical lens widens the spectrum for visual.
Whole thing mounted in a nylon machined block, fits 2" focusser and can accept a webcam.
Total cost: less than $110 compared with the ones out of the US at $300 plus.
If anyone wants more constructional details, drop me a PM.
I'll post some photos later.
ps Seems like they've found another Nova in Scorpius!!!