On 13 Apr 2005 at 16:05, Mark Roberts wrote: > Thanks for that Fred. > Kind of odd testing, IMHO: I was expecting the two curves in each graph > to represent sagittal and tangential MTF numbers, not center and edge.
That would be appropriate for an MTF graph, ie contrast ratio vs distance from the frame centre for a specific f-stop, these graphs are LPM vs f-stop for centre/edge, quite different information. 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
