they (square and tulip) are *strictly* equivalent, if designed properly. if not, the one that is mis-designed worse will be worse.
mishka On Sat, 18 Dec 2004 15:42:09 +1000, Rob Studdert <[EMAIL PROTECTED]> wrote: > On 17 Dec 2004 at 20:52, Andre Langevin wrote: > > > I would put it reverse. The "real" tulip hood that equates a square > > hood had small "flaps" that close its round opening a bit. > > If you ray trace an ideal hood you will generally find that square hoods are a > greater compromise than a well designed tulip hood. > > > Rob Studdert > HURSTVILLE AUSTRALIA > Tel +61-2-9554-4110 > UTC(GMT) +10 Hours > [EMAIL PROTECTED] > http://members.ozemail.com.au/~distudio/publications/ > Pentax user since 1986, PDMLer since 1998 > >
