pico Posted June 16, 2011 Share #1 Posted June 16, 2011 Advertisement (gone after registration) Can 75mm Summilux resolve at f/1.4? It sure can. Large. Zoom in with browser. Focus is dead-on, too. I love this setup. This is the M9 that was smashed in a bicycle accident and rebuilt in New Jersey in record time. The EXIF information regarding F-Stop is incorrect. It was shot at F/1.4. Auto-estimations don't always work. Link to post Share on other sites More sharing options...
Advertisement Posted June 16, 2011 Posted June 16, 2011 Hi pico, Take a look here Can 75mm Summilux resolve at f/1.4?. I'm sure you'll find what you were looking for!
Ivar B Posted June 16, 2011 Share #2 Posted June 16, 2011 It is a wonderful lens. Don`t compare it with the 2.0/75. If you do, you will become uneasy. Link to post Share on other sites More sharing options...
pico Posted June 16, 2011 Author Share #3 Posted June 16, 2011 It is a wonderful lens. Don`t compare it with the 2.0/75. If you do, you will become uneasy. Uh oh. Uneasy how? The 1.4 is very good at F/2, as well. Will I be disappointed? ...and it's hard to feel uneasy about a Summilux 75mm bought for $1,200 USD. First version, used. Link to post Share on other sites More sharing options...
adan Posted June 16, 2011 Share #4 Posted June 16, 2011 The 75 'lux is PDG (pretty damn good) - the 75 'cron is just a tad tighter and crisper across edges, above f/4. (Except, of course, at f/1.4 ) One signature of the 'lux in the longitudinal CA, which is tinting the subject's glasses frames red, and putting some purple and green into the OOF edges in the foreground. The APO 'cron does do away with that. One advantage of the 'lux I've found is that, because the whole lens moves forward when focusing closer (rather than using some internal float as in the 'cron) - the M9 framelines become nice and accurate as far away as 15 feet, where the 'cron is still framing loosely compared to the lines. My 21 is still my most-used lens. But the 75 Summilux has moved to the top of my "shoot me if I ever consider selling this lens again" list. Link to post Share on other sites More sharing options...
pico Posted June 17, 2011 Author Share #5 Posted June 17, 2011 The 75 'lux is PDG (pretty damn good) - the 75 'cron is just a tad tighter and crisper across edges, above f/4. (Except, of course, at f/1.4 ) One signature of the 'lux in the longitudinal CA, which is tinting the subject's glasses frames red, and putting some purple and green into the OOF edges in the foreground. The APO 'cron does do away with that.]. Funny, but that's just exactly how my own glasses look without a camera. Link to post Share on other sites More sharing options...
Ivar B Posted June 17, 2011 Share #6 Posted June 17, 2011 Uh oh. Uneasy how? The 1.4 is very good at F/2, as well. Will I be disappointed? ...and it's hard to feel uneasy about a Summilux 75mm bought for $1,200 USD. First version, used. The Lux 75 is a wonderful lens. I did some comparison shots with this lens and the 2/75, and at the larger f stops it was very apparent that the 2/75 is technically on a higher level. What surprised me the most was the difference is chromatic aberration. I shot some tree leaves against a blue sky and with the 2/75 the leaves were super clean and crisp, while there was clear color fringing around the leaves in photos taken with the 1.4. APO correction is responsible for this, I guess. However, I can certainly accept why many still prefer the 1.4. There is a very nice "glow" in the photos and the more clinical rendering of the 2/75 may not be what everyone prefers. My "uneasy" suggestion was just meant to indicate that you may want a 2/75 when you see how large the difference in performance really is (at the larger f stops). Link to post Share on other sites More sharing options...
01af Posted June 17, 2011 Share #7 Posted June 17, 2011 Advertisement (gone after registration) I agree with everything Ivar B said. Usually, when two lenses with the same focal length but different speeds are on the same technological level then the faster lens, stopped down to the maximum aperture of the slower lens, will perform better than the slower lens at the same aperture. Not so with the Leica 75/1.4 and 75/2 pair of lenses! Here, at f/2, the Apo-Summicron-M Asph clearly is the better performer, in terms of sharpness at the center and edges, contrast, and absence of chromatic aberrations. It's an almost super-natural performance, absolutely incredible. Still, the Summilux-M 75 mm is no slouch. At f/1.4, the whole frame has a faint veil around fine detail which reduces contrast, but the resolution still is very high (as pico's image proves) and drops off only moderately at the edges. Lateral chromatic aberrations clearly are stronger than in the Apo-Summicron-M Asph but correct well in post-processing. Overall, it's an very high level of performance for a super-fast non-asph lens. At f/2, resolution improves a bit and micro-contrast improves significantly but still lags slightly behind the Apo-Summicron-M Asph at f/2. From f/2.8 on, the differences between Summilux-M and Apo-Summicron-M Apsh are diminishing. Another difference between the two is the pitch of the focusing ring. In the Summilux-M, it's pretty long so switching from close range to infinity or vice versa takes some time. Still, focusing is not generally slow—to the contrary, the longer throw makes fine adjustments to precision focus much easier to accomplish and hence, quicker. The throw in the Apo-Summicron-M's focusing ring is so ludicrously short it actually is hard to focus precisely, in particular when you're in a hurry. In my opinion, it definitely is too short and severely compromises usability. Link to post Share on other sites More sharing options...
Xmas Posted June 17, 2011 Share #8 Posted June 17, 2011 I agree with everything Ivar B said. Usually, when two lenses with the same focal length but different speeds are on the same technological level then the faster lens, stopped down to the maximum aperture of the slower lens, will perform better than the slower lens at the same aperture. Hi The f/1.4 was designed in a different epoc, from the Apo, the better glass catalogue allows better correction? The 1.4 has the same signature (from MTF) as the preasph 5cm lux, except for the longer focal length, which expands the on axis circle but introduces greater color abberation. To see real differences you need a stable tripod... Noel Link to post Share on other sites More sharing options...
01af Posted June 17, 2011 Share #9 Posted June 17, 2011 The f/1.4 was designed in a different epoc, from the Apo, the better glass catalogue allows better correction? The basic technological differences between the (older) Summilux-M 75 mm and the (newer) Apo-Summicron-M 75 mm Asph are new design ideas and aspherical elements. And it shows ... To see real differences you need a stable tripod ... I have a stable tripod Link to post Share on other sites More sharing options...
otto.f Posted June 17, 2011 Share #10 Posted June 17, 2011 "I'm just a jealous guy ... " Link to post Share on other sites More sharing options...
Xmas Posted June 17, 2011 Share #11 Posted June 17, 2011 The basic technological differences between the (older) Summilux-M 75 mm and the (newer) Apo-Summicron-M 75 mm Asph are new design ideas and aspherical elements. Not consesual, seems like Leica PR,spiel,. suggest... The new design ideas are probablty the same US ray tracing optimisation (hill climbing) softwae package, and a faster computer, 1980 (the f1.4) was yesterday, it is still a double Gauss design. A lens is made of glass the glass technology is more critical than the design. e.g. The latest '94 Elmar (still a simple Cooke triplet, the 4th element less significant) is on a par with the '79 cron, double Gauss, when both at optimium aperture. The Leica speil does say 'high refracive index' glass. The Apo in title indicates anamolous dispersion glass has been used as well as an aspheric surface, and floating element. The design optimisation is making it easy to make other wise it would be astro in Euro, e.g. rejection of a lower %, for same tolerance variations Noel Link to post Share on other sites More sharing options...
pico Posted June 17, 2011 Author Share #12 Posted June 17, 2011 Thanks for the comments. It is *unlikely that I will purchase a different 75mm lens regardless of the virtues of other 75mm lenses because I'm happy in the path I'm in, and quite accustomed to using the Summilux. (Adding the 'steer' helped a lot.) *Well, it is unlikely unless I win a lottery. I will admit now that I am not nearly as happy with the second version of the 35mm Summilux at F/1.4 when used on the M9. The 'glow' seems so different. But I must give it more time to be sure. Thank you all for your experience. Link to post Share on other sites More sharing options...
pgk Posted June 17, 2011 Share #13 Posted June 17, 2011 All f/1.4 lenses resolve better than f/2 lenses - at f/1.4;). My theory is that if you have an f/1.4 lens then its far more likely that you will use it wide open than at f/2 - otherwise there is little point having the extra stop. I know that on my 35 and 50 'luxes I tend to shoot wide open far more than at f/2, or even f/2.8. I reckon that if anyone ever looked at the statistics of shots taken on fast lenses then they'd bear this out - its a theory I subscribe to anyway. Enjoy your 75 'lux, its on my list, one, diminishingly distant day. Link to post Share on other sites More sharing options...
Gerard Posted June 17, 2011 Share #14 Posted June 17, 2011 What's with all the talk about sharpness? I love my 75 lux... it would take pliers to get it out of my hands. It's soft when you want it to be and sharp (enough) if you need it to be. Then there's the fabulous bokeh, and the chromatic glow... I find it extremely versatile and a joy to use. Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/154438-can-75mm-summilux-resolve-at-f14/?do=findComment&comment=1705432'>More sharing options...
analogisch Posted June 17, 2011 Share #15 Posted June 17, 2011 What's with all the talk about sharpness? I love my 75 lux... it would take pliers to get it out of my hands. It's soft when you want it to be and sharp (enough) if you need it to be. Then there's the fabulous bokeh, and the chromatic glow... I find it extremely versatile and a joy to use. besides the technical discussion I'd just like to say, that I love your 1st picture - phantastic set up. Link to post Share on other sites More sharing options...
lct Posted June 17, 2011 Share #16 Posted June 17, 2011 ...the M9 framelines become nice and accurate as far away as 15 feet, where the 'cron is still framing loosely compared to the lines... Pity that Leica did not keep the M8.2's VF which is almost spot on from 1m to 3m with the 75/2. Link to post Share on other sites More sharing options...
Guest WPalank Posted June 17, 2011 Share #17 Posted June 17, 2011 I love the 75 Summilux: Abyssinian Angel by WPalank, on Flickr Link to post Share on other sites More sharing options...
jaapv Posted June 17, 2011 Share #18 Posted June 17, 2011 I really love these images. Unfortunately as a mod, I must ask you to limit the number in the technical forums But as a member, great to superb stuff. Link to post Share on other sites More sharing options...
Rick Posted June 20, 2011 Share #19 Posted June 20, 2011 pico, I agree that the sharpness surprises. I had the 75 Lux first and really liked it. The new APO designs are so good. But, I sold it after I got the 75 Lux because what the Lux gave up in APO percission, it won back due to its character. It has beautiful OOF rendition, it is very sharp, and when shot at night wide open it has produced some of my favorite shots. The extra stop and the way it draws made me realize that I wouldn't mis the 75Cron. I would never sell the 75Lux. Has to be one of my favorite lenses. Just wish it traveled better - but, then again, Tina Manley travels with hers all the time. I think that every shot is with the 75? Tina Manley Link to post Share on other sites More sharing options...
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