In message , Albert White
writes
Hi,

Does anyone here know of a reasonably priced supplier of diffraction
gratings suitable for webcam spectroscopy?

I
Cheers,
~Al
Greenwell advertised gratings recently but I find that there website is
not running at the moment [ www.greenwell.co.uk]. You may know someone
who has their latest leaflet. I think they were offering 900 lines/mm
strips @£7-99.
--
John