For example the Nikon Z 50mm f1.2 is 1090 grams, 150mm long, and has a 82mm filter size. The Canon RF 50mm f1.2 is 108mm long, but the other dimensions are similar.

Compare that to a Leica Noctilux 50mm f1.2 with a Techart, Megadap or similar adapter (available for Z and E mounts) for autofocus abilities: 405g lens +150g adapter = 655 grams, 52mm lens + ~11mm adapter = 63mm long and 49mm filter size. A little more than half the numbers in all dimensions.

This link approximately shows the size differece (the M to L mount is indeed smaller than the M to Z or M to E autofocus adapters, but the difference is small)

All of these have the same focal length (50mm), max aperture (1.2), and autofocus. So why do these newer mirrorless lens designs have to be so much bigger and heavier than using an old manual lens with an autofocus adapter? Sure the autofocus speed may not be as fast with an adapter but why can’t they design a native autofocus large aperture lens that is tiny like the Leica M lenses. Clearly it is possible to do so.

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Lmaoooo the Noctilux 50 1.2 is a notoriously aberration-filled lens, it doesn’t look super sharp wide open, there’s tons of coma and other issues with it. It is not a high resolution lens. The newer super primes you’re talking about are highly corrected designs that are much more optically “perfect.” They’re sharper, resolve more, and don’t have the optical aberrations that older lenses often have. Plus, the AF adapters for Leica lenses to modern mirrorless bodies will NOT give you the performance of those modern super primes. I tested one on a Sony A7R5 with a Leica lens and the performance was ludicrously bad compared to my Sony GM lenses. It’s not even close. Plus those lenses don’t perform well on Sony bodies—smeared corners, color cast issues, etc. The sensor micro lenses aren’t especially compatible.

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That makes sense. I assumed all Leica lenses had superior optics due to the price. Didn’t realize they were so compromised.

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Leica pricing is mostly due to the fact they are produced in Germany and are paying their labourers German wages. They try to portray themselves as super high-end top-of-the-line quality product you should aspire towards, but the closer you start looking into it the sooner you realize it’s posturing.

Large portion of Leica products are outperformed by Japanese brands who can do it for 1/10 of the costs in better optical quality while being packed with additional features.

Not saying their products are bad, they are just horribly cost-inefficient.

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Some are decent performers. Many are decidedly not. Leica lenses are expensive because they are made in limited quantities by skilled laborers in high cost regions. Even one of Leica’s flagship lenses, the APO Summicron 35mm f2, is outperformed by Sony’s 35mm f1.4 GM (at equivalent f-stops of course). The Leica lens is impossible to get and costs USD $10,000. The Sony can be had for $1200 and be on your doorstep tomorrow.

There is literally no photographic advantage to a Leica lens versus an equivalent lens from Sony or Canon. How do I know? I had a Leica M11 rangefinder camera and two top tier Summilux lenses. In a little over a year, the body and one lens were back to Leica for service twice due to faulty calibration from the factory. The camera absolutely sucked to shoot with. Colors were horrible and needed a ton of post processing to fix. The lenses were just about adequate performance wise but ludicrously overpriced. The one, and I mean one and only advantage is the small size of the M lenses and M body. Of course you give up a ton for it. Performance, autofocus, optical corrections, reliability. The Leica bodies with autofocus are big, heavy, expensive, and the AF lenses are huge. There’s literally no advantage.

I’m in my 40s and have been shooting since high school. I had always wanted a Leica M. When I was finally able to afford one, I was unbelievably disappointed. It was one of the shortest trips from hope to disillusionment I’ve ever experienced. I will never own another Leica product, there is truly nothing except a size advantage that’s even remotely attractive. The last thing I’ll say is that my photography got worse, not better, while shooting with that god-awful system. There are plenty of reasons I can explain if you’re interested.

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The last thing I’ll say is that my photography got worse, not better, while shooting with that god-awful system. There are plenty of reasons I can explain if you’re interested.

I actually very interested. People keeping saying that shooting with the camera like lighter improves your photography because you have to slow down and think about all the settings instead of having the camera do the work. Also A rangefinder allows you to see the whole scene outside the borders of your lens, which is supposedly better for anticipating the subject and final image.

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