On 23 Feb 2004 11:09:37 -0800, (Lurking Luser) wrote:

you could build a single objective lens refractor and fix
chromatic aberration....
Another dumb idea brought to you by,
James King

Not so dumb James.......
a single element positive lens could be regarded as a 'circular' prism
and resultant chromatic aberration captured at the focal plane as
circular spectra!

I've proved it works with sample colour spectra at

http://home.freeuk.com/m.gavin/chromab.htm

but will it 'fire' the Forum???