Archived posting to the Leica Users Group, 2008/05/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Would love to see some f1 images. D.Scollard ----- Original Message ----- From: "Eric Korenman" <faneuil@gmail.com> To: "Leica Users Group" <lug@leica-users.org> Sent: Saturday, May 03, 2008 9:28 AM Subject: [Leica] Update: My Noctilux back from world travels. Looks tan andhappy! > My noctilux just got back from Germany. > It now has a spiffy 6 bit code ring to prove it. > > results: Absolutely spot-on focus at f 1.0 on my M8 > higher apertures still result in drifting back focus (but I didn't > expect them to regrind the lenses..) > > so I am happy. > Whatever they did (likely the shimming by the 6 bit code ring) helped. > No more hex key monkeying with the M8's cam for me. > > Eric > > On Sun, Apr 20, 2008 at 10:58 AM, Eric Korenman <faneuil@gmail.com> wrote: >> My noct is coming back from Germany this week. Wish me luck. >> Leica claimed that adding the 6 bit coding ring would 'shim' it >> slightly and improve focusing with my m8. >> >> here's to sharp eyes and soft ears, >> Eric >> >> >> >> On Sun, Apr 20, 2008 at 10:31 AM, Leonard Taupier <len-1@comcast.net> >> wrote: >> > 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 >> > > >> > >> > >> > _______________________________________________ >> > 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