Archived posting to the Leica Users Group, 2008/04/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Steve, Don didn't ask for my M8, just the lenses. He still has them and I would expect for awhile as he's pretty busy. Others on the Camera forum have done the same thing and report very good results. Len On Apr 20, 2008, at 10:15 AM, Steve Barbour wrote: > > On Apr 20, 2008, at 6:46 AM, Leonard Taupier wrote: > >> This is a very interesting issue. I don't know if anybody has >> mentioned what happens to the depth of field of the Noctilux, or >> any other lens, in a Leica film camera versus the M8 digital >> camera. It seems that nobody complains about the focus on a film >> body but all kinds of complaints on the M8, especially the >> Noctilux, Summilux Asph and the 75mm Summilux. Is there a >> difference? Yup, there sure is. I tested 16 leica lenses for depth >> of field at a distance of 8 feet. I tested 13 of the lenses with >> film using a .85 MP and compared the results to those taken with >> an M8 and a 1.25 Leica magnifier. >> >> In every case the DOF shifts away from the camera with the M8. In >> other words the lens appears to back focus. The worse lens for >> this shift is the Noctilux. But even on a film camera it is barely >> in focus. The typical back focus shift of any 50mm Leica lens is >> about 4 to 5 inches at 8 feet with the M8. The backward shift of >> the Noctilux is between 8 and 9 inches. This puts the focused >> point of the rangefinder outside the depth of field of the lens. >> The other thing I noticed is the DOF is better centered on the >> older LTM lenses then on the newer lenses. I don't know if this is >> a quality control problem now or if the focus point test has >> changed. I tested 7 LTM lenses, the Xenon, Summarit, Summitar, >> Summicron Coll, 50 Elmar RS, 90 Elmar and 135 Hektor. The focus >> point nicely stayed within the DOF on both cameras. Of the M >> lenses the best is the 1st 50mm Summicron rigid version followed >> by the current 50mm Summicron. >> >> I verified my results with a second M8. The MP body is one year >> old and purchased new. I also sent my Noctilux and 75mm Summilux >> to DAG for focus adjustment even though the lens is still in >> warranty. I'm also shooting more with film these days. > > hi Len, > > is it appropriate to send a Noctilux to DAG for focus adjustment, > without the body... > > does that work out OK? > > I agree that with film (bodies) I did fine with the Noctilux wide > open, with the M8 much less so... > > Steve > > >> >> >> Len >> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > best, Steve > > > "I never wanted to be famous" > http://www.blurb.com/bookstore/detail/186890 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information