Archived posting to the Leica Users Group, 2007/06/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I know from using both lens I have to change development times for my B&W film a bit to compensate for the higher contrast of the current 50/2. The added resolution really is a boon in the close-mode and I think it is more pleasant then the Black Elmarit 65 on a visoflex. Some close examples with DR, Elmarit 65 and Trix. DR and TriX http://www.imagebrooklyn.com/street_pages_2007/bs022.htm http://www.imagebrooklyn.com/street_pages_2007/bs018.htm http://www.imagebrooklyn.com/street_pages_2007/bs014.htm Elmarit 65 and viso and TriX. Same soup. http://www.imagebrooklyn.com/street_pages_2007/bs048.htm http://www.imagebrooklyn.com/street_pages_2007/bs045.htm http://www.imagebrooklyn.com/street_pages_2007/bs056.htm Current 50/2, trix, same soup http://www.imagebrooklyn.com/street_pages_2007/bs043.htm http://www.imagebrooklyn.com/street_pages_2007/bs039.htm http://www.imagebrooklyn.com/street_pages_2007/bs042.htm For an M8 I think it is well worth having two, one rigid and one DR. My only issue with the lenses is the front element is so delicate I'm wary of damage and so shy away from taking it traveling. One of the best interesting gadgets I picked-up for the DR is a diaphragm adjusting ring, VTROO (16856) (page 148 in the Lager book Vol III), intended for use on a Focomount but makes a great lens hood. Well worth the 60$ if you can find one. Chris At 06:16 PM 6/23/2007, you wrote: >Steve, >The DR and the "Rigid" Summicron are probably the same formula: we have had >many a long discussion about this over the years. It is a seven element >formulation which is very different from the current formula. In essence, >the DR is the last of the high resolution relatively low accutance designs. >The next formulation went for much higher contrast/accutance at the expense >of some resolution. > >The confusion comes about because MTF charts are all about the ability to >define square wave forms so the new designs are created for the test. Older >designs would resolve much higher resolutions at admittedly low contrast. >Think of a really long tail where even at very low contrast levels you can >distinguish between two lines. > >On 6/23/07, Steve Barbour <kididdoc@cox.net> wrote: >> >> >>On Jun 23, 2007, at 12:26 PM, Leonard Taupier wrote: >> >> > Steve, >> > >> > The experts say the DR and the Rigid made at the same time ( 1956 - >> > 1968 ) are the same lens in formula and performance. >> >> >>so I have one further question and we can wrap this up.... >> >>are they in fact the same optically as the current !! summicron >>50/2 and if not, how are they different... >> >> >>and yes I have read Puts and Gandy, and each time they seem more >>confusing, Steve >> >> >> > >> > Len >> > >> > >> > On Jun 23, 2007, at 3:20 PM, Steve Barbour wrote: >> > >> >> sorry Frank... >> >> >> >> >> >> this discussion is getting a little too deep for me... :-) >> >> >> >> >> >> is the cron 50 DR identical to the old rigid cron 50... of that >> >> era... >> >> >> >> >> >> or is it identical to the cron 50 which is available today ?... >> >> >> >> >> >> (as people say that the two are different from one another) >> >> >> >> >> >> >> >> thanks, Steve >> >> >> >> >> >> On Jun 23, 2007, at 12:11 PM, Frank Dernie wrote: >> >> >> >>> I mean contemporary with the one you own. >> >>> Frank >> >>> >> >>> On 23 Jun, 2007, at 13:49, Steve Barbour wrote: >> >>> >> >>>> >> >>>> On Jun 23, 2007, at 12:49 AM, Frank Dernie wrote: >> >>>> >> >>>>> The contemporary >> >>>> >> >>>> >> >>>> thanks Frank... do you mean the contemporary from then or >> >>>> now.... ? >> >>>> >> >>>> >> >>>> Steve >> >>>> >> >>>> >> >>>>> rigid Summicron is identical to the DR, apart from the close >> >>>>> focus arrangement. If you like the look so much why not get one >> >>>>> of those as well? >> >>>>> Frank >> >>>>> >> >>>>> On 23 Jun, 2007, at 08:29, Peter Klein wrote: >> >>>>> >> >>>>>> Steve: That was me. I had the idea of getting a cheap Rigid >> >>>>>> Summicron with bad glass and the correct focal length marked >> >>>>>> inside. The DR and Rigid lens heads unscrew from the mounts, >> >>>>>> so I thought I could put my DR lens head in the rigid mount >> >>>>>> for the M8, and still have the close range on film. I asked >> >>>>>> DAG about it, and he said that the mounts were different and >> >>>>>> it wouldn't work. But he also said that he could cut off the >> >>>>>> close focus part of the cam, and then it would work in the >> >>>>>> normal range on the M8. >> >>>>>> >> >>>>>> The unmodified DR does work in close-focus range on the M8. I >> >>>>>> know for sure, because I've tried it. When it's set in the >> >>>>>> normal range, the close-focus half of the cam sticks out too >> >>>>>> far, and it hits something inside the body when you try to >> >>>>>> mount it. I have read about this, and I have decided to >> >>>>>> believe it and not try it myself. :-) >> >>>>>> >> >>>>>> I'm still thinking about whether to have DAG do the >> >>>>>> "operation." It will depend on how much I like the 67mm >> >>>>>> equivalent length the 50mm turns into on the M8. And whether >> >>>>>> I want to desecrate a sacred object. Funny that I feel this >> >>>>>> way--I've used the close range all of twice since I got the >> >>>>>> lens. But another DR was my first Leica lens, way back in >> >>>>>> 1970. I really love how the DR draws, how it's made, how it >> >>>>>> feels. And it's a Wetzlar product from the Golden Age. So >> >>>>>> I'm reluctant to give the lens a "vasectomy" unless I'd really >> >>>>>> use it a lot on the M8. >> >>>>>> >> >>>>>> Decision postponed while I experiment with my other 50s. >> >>>>>> >> >>>>>> --Peter >> >>>>>> >> >>>>>> At 02:29 PM 6/21/2007 -0700, Steve Barbour wrote: >> >>>>>>> recall hearing that the cron 50mm DR can be modified, >> >>>>>>> so that it can be used on the M8 body... >> >>>>>>> maybe that was reported here... >> >>>>>>> if someone can substantiate this, and give me details, I'd >> >>>>>>> appreciate >> >>>>>>> it... >> >>>>>>> >> >>>>>>> thanks, Steve >> >>>>>> >> >>>>>> >> >>>>>> _______________________________________________ >> >>>>>> 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 >> >>> >> >>> >> >>> _______________________________________________ >> >>> 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 >> >> >>_______________________________________________ >>Leica Users Group. >>See http://leica-users.org/mailman/listinfo/lug for more information > > > >-- >Don >don.dory@gmail.com > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information Chris Saganich, Sr. Physicist Weill Medical College of Cornell University New York Presbyterian Hospital chs2018@med.cornell.edu Ph. 212.746.6964 Fax. 212.746.4800 Office A-0049