robert_parker Posted January 20, 2007 Share #21 Posted January 20, 2007 Advertisement (gone after registration) There is an interesting article in BJP dated 03 01 07 which compares several Leica lenses with the newer Zeiss M mount lenses at 21, 28 and 50mm Link to post Share on other sites More sharing options...
Advertisement Posted January 20, 2007 Posted January 20, 2007 Hi robert_parker, Take a look here Ten errors that carry through history. I'm sure you'll find what you were looking for!
stunsworth Posted January 20, 2007 Share #22 Posted January 20, 2007 Robert, I haven't seen the article but less me guess at the conclusions :-) Leica is still the best, however the Zeiss lenses are nearly as good and better than the Voigtlander lenses manufactured by Cosina - and let's not forget that the Zeiss lenses that are currently available are also made by Cosina. This is not intended to be a put down of the Voigtlander lenses. I've been out today shooting with an M8 and 28mm Voigtlander Ultron. The Voigtlander lens is _excellent_, it's made me re-assess whether I need to buy a 28mm Summicron! Link to post Share on other sites More sharing options...
TimF Posted January 21, 2007 Share #23 Posted January 21, 2007 The test is one of Anders Uschold's technical ones, so concentrates on those sort of things, eg, vignetting, distortion etc. At the 21mm focal length, Leica's lens has better performance at maximum aperture than the Zeiss, which "improves markedly" when stopped down to f/4. From that point both are pretty much on a par. Barrelling on both is a mere 0.5%, far better than any SLR lens can do - please note OP. The M8's lens coding & software does make a visible difference in corner shading. With the 28mm lenses, the Zeiss has better max aperture performance than the new Leica Elmarit-M Asph. The two match up by f/5.6. Distortion is minimal again, slight barrelling on the Zeiss (-0.3%) and pincushioning on the Leica (0.3%). The M8 corner shading correction again makes a difference. As for the 50mm lenses, the Zeiss is again better wide open, but the Summicron overtakes it from about 1.5 stops down. There is effectively no visible distortion at all on the Leica lens, and 0.4% barrelling on the Zeiss. With the Leica corner shading compensation turned off, the Zeiss shows slightly better performance at wider apertures. With it on, this is reversed, but Uschold notes a curious phenomenon; with the Summicron stopped down, the corners begin to get brighter than the centre. Link to post Share on other sites More sharing options...
andybarton Posted January 21, 2007 Share #24 Posted January 21, 2007 Are you looking for an 18 month old 24mm, to go with your new toy, Steve? Link to post Share on other sites More sharing options...
twom4 Posted January 21, 2007 Share #25 Posted January 21, 2007 what's your problems zapp? Link to post Share on other sites More sharing options...
stunsworth Posted January 21, 2007 Share #26 Posted January 21, 2007 Might be Andy, but funds are a little tight just at the moment ;-) Link to post Share on other sites More sharing options...
lambroving Posted January 21, 2007 Share #27 Posted January 21, 2007 Advertisement (gone after registration) Robert, I haven't seen the article but less me guess at the conclusions :-) Leica is still the best, however the Zeiss lenses are nearly as good and better than the Voigtlander lenses manufactured by Cosina - and let's not forget that the Zeiss lenses that are currently available are also made by Cosina. This is not intended to be a put down of the Voigtlander lenses. I've been out today shooting with an M8 and 28mm Voigtlander Ultron. The Voigtlander lens is _excellent_, it's made me re-assess whether I need to buy a 28mm Summicron! Hmmm... You had better not borrow a 28/2 then. Ask LCT. Zeiss lenses are fine if you happen to like their character and color rendition, but that damned fingerprint of the 28/2 will suck you in. You were warned... Link to post Share on other sites More sharing options...
zapp Posted February 9, 2007 Author Share #28 Posted February 9, 2007 I've read the OP's ramblings a few times and I still don't get it. The title says 'Ten errors' and yet I only see two, and then they don't make any sense to me. Whoever said that Leica invented the SLR? Does the OP have any ideas for how designers should get around the 'problems' he mentions? Zapp has sapped my energy in responding to this thread and should be zapped! Go make some pictures. Since you ask a question, I may answer again to my own post. I am not starting a discussion, just to tell you the ten results otherwise it is not a discussion. I am not interested in the problems of engineers, but engineering problems cause trouble over long times. This is the inetntion of the post. I do not intent to apologize to 70 people because I used the word error and Leica in the same header. Although, I find it rather amusing that everybody is just popping up to tell me that Leica committed no mistakes ever and the never will, and blablabla. So all the owners of the Summicron 2/28 are happy with their lens. good to know. What about the even wider angles, what about your own ideas that yoou may have encountered... The next post tells me that: Distorsion values FWIW: Sumicron 28/2 asph: 0.14% (Chasseur d'Images # 290) If you want to talk numbers: The official Leica pdf tells you something of just above 1% distortion at the corner - time to rethink your argumentation. Btw, I have a camera with thhe same angle of view as your 28 mm Summicron that distorts 0.013% at 80 mm radial distance from the center. You will not this really low distortion for every day photogragraphy, but as you see, you can do better than your lens does. The camera of my friend distorts just 0.005% (still same angle opf view) - should I be yellous now. Link to post Share on other sites More sharing options...
zapp Posted February 9, 2007 Author Share #29 Posted February 9, 2007 Zapp, Do you use, or have you ever used Leica equipment? And if not, do you consider experience with Leica gear to be irrelevant to your claims, and why? Larry I have used M and R Leicas, Leica GPS, Leica Total Stations, Leica Microscopes, Leica Laser Distance Meters, Leica Software, Leica whatever .... I also own my own Leica photo gear, and I own and work with several other cameras of different manufacterers and formats. I appreciate my Leica very much, comparing it to other 35 mm photo gear, but, believe it or not, there is a life beyond the red dot and you can always make things better. Experience is very important - and now: What is your point? Link to post Share on other sites More sharing options...
andybarton Posted February 9, 2007 Share #30 Posted February 9, 2007 Btw, I have a camera with thhe same angle of view as your 28 mm Summicron that distorts 0.013% at 80 mm radial distance from the center. You will not this really low distortion for every day photogragraphy, but as you see, you can do better than your lens does. The camera of my friend distorts just 0.005% (still same angle opf view) - should I be yellous now. Which cameras and lenses are these, Zapp? Link to post Share on other sites More sharing options...
bill Posted February 9, 2007 Share #31 Posted February 9, 2007 I really don't get this thread. From the portentious title onwards it just smacks of trolling to me. Regards, Bill Link to post Share on other sites More sharing options...
NZDavid Posted February 12, 2007 Share #32 Posted February 12, 2007 No distortion apparent with the 24ASPH; it's a superb lens. Some SLR WA optics do display appalling distortion -- faces at the end of the frame become oblongs. So no error as far as I can make out. All camera/lens designs are compromises to some degree. Link to post Share on other sites More sharing options...
telyt Posted February 12, 2007 Share #33 Posted February 12, 2007 I find it rather amusing that everybody is just popping up to tell me that Leica committed no mistakes ever and the never will, and blablabla. I'm not sure how mr. zapp has formulated this impression; it sounds like he is projecting his own former belief onto other Leica users. Link to post Share on other sites More sharing options...
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