kirkmc Posted September 10, 2021 Share #1 Posted September 10, 2021 Advertisement (gone after registration) I got a Q2M last week, my first Leica, and I was wondering about the lens. Leica makes a 28mm Summilux f1.4, and this lens is the same, but f1.7. Is it essentially the same lens, and is the maximum aperture related to the fact that it's a fixed lens? I was curious because the f1.4 costs about the same price as the Q2M, so my thought is that it's not quite the same. Quote Link to post Share on other sites More sharing options...
Advertisement Posted September 10, 2021 Posted September 10, 2021 Hi kirkmc, Take a look here Question regarding the Q2 lens. I'm sure you'll find what you were looking for!
Tp2000 Posted September 10, 2021 Share #2 Posted September 10, 2021 If you subscribe to Reid reviews, he did a comparison of resolution and vignetting between the two lenses. Tl;dr version - they’re two different lenses. The 1.7 relies upon software to correct barrel distortion whereas the 1.4 design is optimised to minimise distortion etc. 1 Quote Link to post Share on other sites More sharing options...
Anakronox Posted September 11, 2021 Share #3 Posted September 11, 2021 And the Q2 lens also sports a leaf shutter. 1 Quote Link to post Share on other sites More sharing options...
Tortuga Posted September 13, 2021 Share #4 Posted September 13, 2021 Totally different lens. The Q lens plays with distortion to achieve its performance; the M lens doesn’t have that luxury. Quote Link to post Share on other sites More sharing options...
earleygallery Posted September 13, 2021 Share #5 Posted September 13, 2021 The lens for the Q is designed with specific sensor in mind and is effectively one unit. As said above it relies on distortion correction in camera (if you took a photo with the lens otherwise there would be terrible wide angle distortion!). The M lens is designed to show minimal distortion as it can be used with a film camera or a digital camera and is a much more complex design. Quote Link to post Share on other sites More sharing options...
Yarosuav Posted September 13, 2021 Share #6 Posted September 13, 2021 I have both the Q2 and the Summilux on my M10-R. First and foremost, on top of everything mentioned above, the Summilux is 1.4 and the Q2 is not… They also render very differently (to my eye at least). They Q2 lens is extremely sharp even at 1.7 and has this hyper-real 3D rendering and subject separation, I absolutely love it… Even though the 1.7 aperture will obviously not give you same focus fall-off as 1.4, there’s something about the Q2 look that makes the subject stand out nevertheless… The Summilux to me is more “gentle” for a lack of better word. 2 1 Quote Link to post Share on other sites More sharing options...
acg69 Posted September 23, 2021 Share #7 Posted September 23, 2021 Advertisement (gone after registration) First of all: beautiful images on your site, congratulations! You mentioned that the 1.7 is not a 1.4 and that the former doesn't have the focus fall-off of the latter, which is probably true, but can you actually see the difference in the images and are you sure it should be attributed to the difference in maximum aperture and not in the different design of the lenses? Quote Link to post Share on other sites More sharing options...
Yarosuav Posted September 23, 2021 Share #8 Posted September 23, 2021 1 hour ago, acg69 said: First of all: beautiful images on your site, congratulations! You mentioned that the 1.7 is not a 1.4 and that the former doesn't have the focus fall-off of the latter, which is probably true, but can you actually see the difference in the images and are you sure it should be attributed to the difference in maximum aperture and not in the different design of the lenses? Thanks! I think part of the difference is definitely due to the Summilux being 1.4 and the Q2 1.7. But I’m not an expert enough to say how much of the difference is due apertures, and how much due to design… Quote Link to post Share on other sites More sharing options...
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