Archived posting to the Leica Users Group, 2008/04/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Now I understand what you're saying. Thank you! Adam (who doesn't want to do an awful lot of testing, just wants to measure his own M8 and Noct combo) AB On Sun, Apr 20, 2008 at 11:19 AM, Leonard Taupier <len-1@comcast.net> wrote: > When I use the focus chart I find the results are different from real like > photos. If I build a test bed which is along the horizontal plane and the > camera is at the same height as the test, I can move further away from the > target to a more realistic distance. For a rangefinder camera it is more > realistic to be 5, 6, 7 feet from the focus point. I got more accurate > results. The test chart was developed for a SLR with a contrast detecting > auto focus system. If it detects the contrast and sets the lens improperly > it will have an error no matter what the distance. Not so with the > rangefinder. > > I hope I was able to be a little clearer. I had to do an awful lot of > testing to come up with this opinion. > > Len > > > > On Apr 20, 2008, at 1:57 PM, Adam Bridge wrote: > > On Sun, Apr 20, 2008 at 10:02 AM, Leonard Taupier <len-1@comcast.net> > > wrote: > > > > Adam, > > > > > > Good memory. > > > > > > The chart is here. Print out the pdf. Print page 9 with photo grade > > > paper. > > > That's the chart. > > > > > > < http://focustestchart.com/focus20.pdf> > > > > > > I originally used this chart but found if everything is on the same > > > plane > > > the results are more accurate. > > > > > > > > Len, I don't think I understand what you mean here. Could you elaborate? > > > > Adam > > > > > > > Len > > > > > > > > > > > _______________________________________________ > > Leica Users Group. > > See http://leica-users.org/mailman/listinfo/lug for more information > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >