Archived posting to the Leica Users Group, 2007/06/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]thanks Chris... the DR is quite special....Steve On Jun 25, 2007, at 8:20 AM, Chris Saganich wrote: > 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 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information