lct Posted January 30, 2013 Share #41  Posted January 30, 2013 Advertisement (gone after registration) ...The absolutely worst lens in this regard is the Apo-Summicron-M 75 mm Asph—here, the focusing throw clearly is way too short. The Apo-Summicron-M 50 mm Asph is slightly better than that but slightly worse than, say, the Summilux-M 50 mm Asph which has an uncomfortably short focusing throw but—unlike the 75/2—not entirely insane yet. Still, if you ever used a Noctilux and the current Summilux in parallel then you'll have noticed how difficult the Summilux is to focus in comparison and what a joy it is with the Noctilux due to the significantly longer focus throw... I have no experience with Noctiluxes but both 50/1.4 asph and 75/2 are OK for me. Would you say that the 50/2 apo's focus throw is similar to that of the Summarit 35/2.5? Link to post Share on other sites More sharing options...
Advertisement Posted January 30, 2013 Posted January 30, 2013 Hi lct, Take a look here Leica Apo-Summicron-M 2/50 APSH. I'm sure you'll find what you were looking for!
wizard Posted January 30, 2013 Share #42 Â Posted January 30, 2013 ...Whether a focus throw is too short or not depends on many factors, ... Â One of which, maybe the most important one, is personal preference. By what lct has visualized above, it seems that the new Summicron AA 50 actually has a LONGER focus throw than its predecessor, the still current Summicron 50. Â Andy Link to post Share on other sites More sharing options...
Erik Gunst Lund Posted January 30, 2013 Share #43  Posted January 30, 2013 One of which, maybe the most important one, is personal preference. By what lct has visualized above, it seems that the new Summicron AA 50 actually has a LONGER focus throw than its predecessor, the still current Summicron 50. Andy  No! it's the other way round the 50 APO only has about 90 deg similar to 35mm 2.5 the current 50mm Summicron is clearly more focus throw! And a joy to focus. Link to post Share on other sites More sharing options...
lct Posted January 30, 2013 Share #44  Posted January 30, 2013 Yes but it has no focus tab. The tabbed 50/2 v4 (11819) is a joy to use as well. I would have expected the same kind of focus throw for the 50/2 apo so i'm a bit surprised at the 90°. Are you sure of that? Link to post Share on other sites More sharing options...
Erik Gunst Lund Posted January 30, 2013 Share #45  Posted January 30, 2013 You can see the APO lens on the  50 Summicron also focuses past 0.7 to about 0.65m - I'm not sure if the APO focuses past 0.7... Link to post Share on other sites More sharing options...
lct Posted January 30, 2013 Share #46  Posted January 30, 2013 Hard to see if it's 90° or more... Link to post Share on other sites More sharing options...
Erik Gunst Lund Posted January 30, 2013 Share #47 Â Posted January 30, 2013 Advertisement (gone after registration) Yes it is hard to see probably more... 95 deg? But definitely much less than the latest 50 Summicron Edit Post #15 above has a nice image that shows the throw Link to post Share on other sites More sharing options...
01af Posted January 30, 2013 Share #48 Â Posted January 30, 2013 By what lct has visualized above, it seems that the new Apo-Summicron-M 50 mm Asph actually has a LONGER focus throw than its predecessor, the still current Summicron 50 mm. There's a lot of imagination in lct's "visualisation" above. As a matter of fact, the Apo-Summicron-M 50 mm Asph has a significantly shorter focus throw than the Summicron 50 mm. And, by the way, the Summicron is not the Apo-Summicron's "predecessor". Link to post Share on other sites More sharing options...
hoppyman Posted January 30, 2013 Share #49  Posted January 30, 2013 Different users have different preferences and styles of course. I have never used any of the Noctilux versions nor the Summilux 75. I do use my Summilux 50 ASPH and the APO Summicron 75 ASPH more than my other lenses by quite a margin. I do not routinely use them wide open but the 75 just works fine for me at f/2 when I want. Thoughtful in BW photo - Geoff Hopkinson photos at pbase.com  I've never experienced any imprecision nor difficulty with the focus on my 75 in the manner that I use it. I just checked and I have shot about 2,500 frames with mine. My Summilux 50 ASPH has had to be recalibrated but is now behaving impeccably again.  I'm bemused when I read such firm statements describing design deficiencies in the new APO 50 Summicron ASPH when it is of course still in extremely limited use and supply.  Peter Karbe and his team have designed a state of the art benchmark lens from what I understand. Pretty bold to suggest that he got it wrong, most especially when there cannot be more than a handful of people worldwide with significant experience with it in use. Link to post Share on other sites More sharing options...
01af Posted January 30, 2013 Share #50 Â Posted January 30, 2013 Pretty bold to suggest that he got it wrong ... Huh!? Where has such a suggestion been made? Link to post Share on other sites More sharing options...
Erik Gunst Lund Posted January 30, 2013 Share #51 Â Posted January 30, 2013 ...Peter Karbe and his team have designed a state of the art benchmark lens from what I understand. Pretty bold to suggest that he got it wrong, most especially when there cannot be more than a handful of people worldwide with significant experience with it in use. What are you referring too? I have not seen that stated here... Link to post Share on other sites More sharing options...
jankap Posted January 30, 2013 Share #52 Â Posted January 30, 2013 I propose to refer to post #15. Are the pictures in the technical data useful? Jan Link to post Share on other sites More sharing options...
Erik Gunst Lund Posted January 30, 2013 Share #53  Posted January 30, 2013 I propose to refer to post #15.Are the pictures in the technical data useful? Jan  Yes you can just see the 0.8 on the focus scale from the side. Link to post Share on other sites More sharing options...
wizard Posted January 30, 2013 Share #54 Â Posted January 30, 2013 ...And, by the way, the Summicron is not the Apo-Summicron's "predecessor". Â Well, thinking in terms of optical computations, since the Apo-Summicron is a 50mm lens having a maximum aperture of f2, and since the same is true for the Summicron, and finally since both lenses bear the Summicron designation, I thought is was justified to call the Summicron the Apo-Summicron's predecessor. But I may be too naive. So exactly which lens do you think is the Apo-Summicron's predecessor? Link to post Share on other sites More sharing options...
Erik Gunst Lund Posted January 30, 2013 Share #55 Â Posted January 30, 2013 There is no predecessor IMHO... not among Leica M A distant cousin could be the Costal optics 60mm I could be interesting to see a comparison on the new M BTW the CO 60mm also has a very short focus throw... Link to post Share on other sites More sharing options...
wizard Posted January 30, 2013 Share #56 Â Posted January 30, 2013 There is no predecessor IMHO... not among Leica M Â By that token, the Summilux 1.4/50 would not be the Summilux -Asph.' 1.4/50 predecessor. Which does not make sense. Link to post Share on other sites More sharing options...
lct Posted January 30, 2013 Share #57 Â Posted January 30, 2013 The 50/2 will be the 50/2 apo's predecessor if the former is the last non-apo Summicron, which nobody can be sure but Leica. Link to post Share on other sites More sharing options...
wizard Posted January 30, 2013 Share #58 Â Posted January 30, 2013 Well, then for the time being at least, the 50/2 must be the 50/2 apo's predecessor. And given the extreme difficulties in exceeding the regular Summicron's performance (the raison d'etre of the Apo-Summicron), I strongly doubt that Leica will come up with a successor to the regular Summicron. Link to post Share on other sites More sharing options...
Erik Gunst Lund Posted January 30, 2013 Share #59  Posted January 30, 2013 By that token, the Summilux 1.4/50 would not be the Summilux -Asph.' 1.4/50 predecessor. Which does not make sense. Predecessor : one that precedes; especially : a person who has previously occupied a position or office to which another has succeeded  We just don't agree I guess... to me a predecessor is removed, terminated or replaced... Link to post Share on other sites More sharing options...
Steve Ash Posted January 30, 2013 Share #60  Posted January 30, 2013 It is not by accident that you replied first to Geoff.  Regards, Steve  Huh!? Where has such a suggestion been made? Link to post Share on other sites More sharing options...
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