Re: Wideangle enablement :)

[Steve Jolly]

Chris Stoddart wrote:
Or maybe it's concave to make sure it *doesn't* have any effect? If a flat 
sheet of glass (re Mike Wilson's suggestion) has the effect of changing 
the angle of refraction noticeably at higher angles of incidence (and 
this *is* a wide angle lens) then it would make sense to offer up a 
concave (diverging) lens to counter the converging effect of diffraction? 
:-)

Yeah, the possibility crossed my mind. :-)  That's about the point where 
I decided that actual measurements/calculations would be required, and 
no way could I be bothered... ;-)

S