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Light Lens Lab 35mm f/1.4 Aspherical "11873" Review

  
 
DandA123
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p.3 #1 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


Fred Miranda wrote:
That's exactly how I see it. The pre-FLE and FLE share the same core optical design, with the key difference being the floating group in the FLE, which improves SA correction at closer distances. Based on that shared design, both the Leica and the LLL 11873 should show very similar rendering, and that rendering is clearly different from the newer Summilux designs.

Update: Jimmy shared a side-by-side rendering comparison of the pre-FLE and FLE, showing that their performance and rendering are very similar, which makes sense given their nearly identical optical design. While there are subtle differences between the pre-FLE
...Show more

Yes I saw his comparison which appeared to be well done. Unless it was sample variation, the differences I noticed between my pre FLE and FLE (ver 1) was notable and I think a few other here on FM also chimed in on the same differences between these two lenses. (the pre FLE and FLE ver 1). Again none of this takes away what has been tested and posted so far in Fred testing.



Dec 23, 2025 at 12:20 AM
nehemiahphoto
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p.3 #2 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


I have posted this several times over the years, but I think it is pretty definitive and it matches up with my experience of owning both the FLE and Pre-FLE ASPH’s:

https://www.pebbleplace.com/reviews/rangefinder/leica_35mm_summilux_fle/index.html

I also found the Pre-FLE to have more fringing than the FLE in my experience (the FLE already has quite a bit) but did not test them side by side.



Dec 23, 2025 at 12:20 AM
raizans
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p.3 #3 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


Fred, have you done the film tests already? I was hoping you could both B&W (something like Tri-X or HP5) and color.


Dec 23, 2025 at 03:29 AM
Mayasan
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p.3 #4 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


Keithwee has posted his review on the lens, one thing bothers me is the night scene out of focus highlights, which has unnatural artifacts distract the image. Probably due to the uneven aspherical molding that hardly avoid.


Dec 23, 2025 at 05:20 AM
DandA123
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p.3 #5 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


nehemiahphoto wrote:
I have posted this several times over the years, but I think it is pretty definitive and it matches up with my experience of owning both the FLE and Pre-FLE ASPH’s:

https://www.pebbleplace.com/reviews/rangefinder/leica_35mm_summilux_fle/index.html

I also found the Pre-FLE to have more fringing than the FLE in my experience (the FLE already has quite a bit) but did not test them side by side.


My take from reading the Pebble Place review you provided the link for, comparing the Leica 35mm f1.4 ASPH pre FLE vs the Leica 35mm f1.4 FLE (Ver 1) is that there are notable differences in how these two lenses render (among other things), especially at the wider apertures and its mirrors what I had suggested about these two lenses in my previous posts, having used both these lenses.

It's also why based on the preliminary images Fred posted, comparing the new LLL 35mm f1.4 vs the Leica 35mm f1.4 FLE, especially the sharpness differences seen at the wider apertures, (both centrally and at the edges), the results seem to emulate to a degree what the Pebble Place article found when comparing the ASPH Pre FLE vs the ASPH FLE. My thoughts at this early stage, is that the LLL lens and Leica's ASPH Pre FLE are more similar than either of these lenses are to the Leica ASPH FLE.

Personally, I had always preferred the Leica 35mm f1.4 ASPH Pre FLE to the FLE versions for it having somewhat more character (even when focus shift is taken out of the equation) and having some desirable traits for my particular use, even though the FLE can clearly outperform it and appears to be much more modern.

Of course, I and I'm sure many would love the original Leica AA be thrown into the mix for comparative testing.

Dave



Dec 23, 2025 at 10:57 AM
JohnKraus
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p.3 #6 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


Fred, very useful comparisons, thanks for taking the time and effort to do it right.

Edited on Dec 23, 2025 at 11:53 AM · View previous versions



Dec 23, 2025 at 11:47 AM
JohnKraus
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p.3 #7 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


Dave, very interesting and useful, thanks for sharing.


Dec 23, 2025 at 11:52 AM
Fred Miranda
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p.3 #8 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review






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Distortion

It is well known that the original Leica 35mm f/1.4 Summilux Aspherical, the AA, is very well corrected for distortion, so I fully expected the Light Lens Lab version to follow the same path, and it does. That said, I was curious about this statement from Light Lens Lab:

"Advanced Materials: Integration of newly developed Extra-Low Dispersion and Achromatic elements alongside a new aspherical component to effectively reduce distortion, diffraction, and chromatic aberrations."

LLL mentions small tweaks to the optical design, specifically newly developed glass intended to further reduce distortion, diffraction, and chromatic aberrations. I do not believe diffraction is the right term here, since diffraction is dictated by aperture rather than optical design. It is more likely they are referring to improvements in aberration control, possibly astigmatism. Regardless of terminology, the question for me was simple: how does this lens actually perform in terms of distortion, and does it match or possibly improve upon the original Leica?

In practice, the lens is essentially distortion free. The built in Lightroom profile for the "Leica 35mm f/1.4 ASPH." overcorrects and introduces pincushion distortion, which makes it unusable for this lens. There is a tiny amount of barrel distortion present, but it is so minor that it would go unnoticed in real world images. A simple "+1" adjustment on the Lightroom distortion slider fully neutralizes it.

That puts this lens right where it should be, and very much in line with what the original AA is known for.

Below are examples showing an uncorrected image followed by a distortion-corrected version:




Uncorrected

  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. 11873 lens    35mm    1/25s    100 ISO    0.0 EV  






Corrected in LR using distortion slider +1

  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. 11873 lens    35mm    1/25s    100 ISO    0.0 EV  









Dec 23, 2025 at 12:44 PM
_jim_
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p.3 #9 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


nehemiahphoto wrote:
I have posted this several times over the years, but I think it is pretty definitive and it matches up with my experience of owning both the FLE and Pre-FLE ASPH’s:

https://www.pebbleplace.com/reviews/rangefinder/leica_35mm_summilux_fle/index.html

I also found the Pre-FLE to have more fringing than the FLE in my experience (the FLE already has quite a bit) but did not test them side by side.


I'm inclined to listen to/read everyone's opinions, but the two images shared in this link don't really show any meaningful differences between the lenses, imo (which doesn't discredit the author's feelings, it just doesn't really prove them).

The thread from Shawn comparing the Leica 11873 vs 11874 show very real differences in how those lenses draw. I just wish he still had his Leica AA so it could be compared with the LLL.




Dec 23, 2025 at 12:47 PM
nehemiahphoto
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p.3 #10 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


DandA123 wrote:
My take from reading the Pebble Place review you provided the link for, comparing the Leica 35mm f1.4 ASPH pre FLE vs the Leica 35mm f1.4 FLE (Ver 1) is that there are notable differences in how these two lenses render (among other things), especially at the wider apertures and its mirrors what I had suggested about these two lenses in my previous posts, having used both these lenses.

It's also why based on the preliminary images Fred posted, comparing the new LLL 35mm f1.4 vs the Leica 35mm f1.4 FLE, especially the sharpness differences seen at the wider apertures,
...Show more

@DandA123 I have the same experience and thoughts as you largely. Except 2 distinctions:

1) I have been under the impression that the FLE and Pre-FLE ASPH drew much more similarly to each other than the either of them draws to the original AA that this LLL replica is based on. I hope that's true. But I am not firm on this thought--it's been several years since I researched it. While there were comps, they were not of the exhaustive quality that we have come to expect in 2025. Does anyone have comps/links of the original ASPH to the Pre-FLE?

2) I never bonded with the 35 pre-FLE. For my tastes, and it's all about tastes with 30 year old fast glass, I just thought it was too boring--not enough character to be a character lens, and not enough modern juice to be special like the FLE. That's why I ultimately settled into a 35 pre-asph v2 for character, and something like a ZM 35/1.4, 35 Lux FLE or CV 35/1.7 for modern. Though I realize that's a non-preferred for many two lens solution though it's actually cheaper with a ZM or CV 35/1.7 than one pre-FLE.

Very curious to see Fred's rendering tests. I hope someone, cause I don't think Fred will, compare this LLL to a Pre-FLE and Simera 35/1.4. Then we'd have a very strong understanding of just where this LLL lands.

@_jim_ I am open minded too--just trying to understand the differences. It has always been my impression that the lenses (Pre-FLE and FLE) structurally draw closer to each other than is often said (oversold on bokeh differences), while the contrast and overall feel of the images differs appreciably (undersold on this front). That was my experience from shooting them.

Edited on Dec 23, 2025 at 01:28 PM · View previous versions



Dec 23, 2025 at 12:50 PM
 


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_jim_
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p.3 #11 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


nehemiahphoto wrote:
@DandA123@ I have the same experience and thoughts as you largely. Except 2 distinctions:

1) I have been under the impression that the FLE and Pre-FLE ASPH drew much more similarly to each other than the either of them draws to the original AA that this LLL replica is based on. I hope that's true. But I am not firm on this thought--it's been several years since I researched it. While there were comps, they were not of the exhaustive quality that we have come to expect in 2025. Does anyone have comps/links of the original ASPH to the Pre-FLE?

2) I
...Show more

If you still have your FLE, I have a pre-FLE - let's meet up and we can compare.



Dec 23, 2025 at 01:06 PM
nehemiahphoto
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p.3 #12 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


@_jim_ I don't have my FLE any longer. Sadly--but we can meet up regardless and compare other fun glass. I still have my Noct 50/1 and 35 Lux Pre-asph v2 and such if that interests you.

Who knows--might end up with this LLL too.

And I had forgotten about Sean's excellent AA versus Pre-FLE post. Which I partook on lol.



Dec 23, 2025 at 01:10 PM
Fred Miranda
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p.3 #13 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review






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Field Curvature

I've noticed field curvature in my sample images from the Light Lens Lab 35mm f/1.4 Aspherical. As I mentioned before, I'm not entirely sure how the original Leica behaved, but from what I've read, some field curvature was present there as well.

On this lens, the curvature is outward, which you can see in my infinity resolution tests since I focus the scene at the center and do not refocus, and in the rendering of the sample images I've shared. Looking at the photos, you can see the curvature from the center toward the edges, which can sometimes make out-of-focus areas at the edges appear sharper than expected depending on subject distance. This is common for 35mm lenses, even modern ones, and is part of the character of this lens.

If you adapt this lens to a mirrorless camera, especially one with a thick sensor stack like Sony's, the outward field curvature will appear far more pronounced than it does on the Leica M10-R shown here.

Here is a GIF showing how the focus area changes from close distance to infinity across multiple focus points:









Here’s how it affects out-of-focus rendering: subjects at mid-distance, around 2m, have backgrounds that are out of focus in the center but come more into the focal plane toward the edges due to field curvature.

  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/4.0    1/3000s    100 ISO    0.0 EV  




Dec 23, 2025 at 01:51 PM
Fred Miranda
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p.3 #14 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review






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Minimal Focus Distance: Resolution and Contrast

The Light Lens Lab 35mm f/1.4 Aspherical focuses down to 0.7m, which is perfect for rangefinder use, as it matches the closest focusing limit of the system.

When it was designed, floating elements were uncommon, and this lens does not include one. It was optimized for infinity focus, which means close-focus shooting is less optically corrected. As a result, spherical aberration becomes noticeable at distances closer than 1.5m, especially near the minimum focus distance.

I tested the LLL 35mm f/1.4 Aspherical at 0.7m using apertures from f/1.4 to f/5.6. The largest improvement occurs when stopping down from f/1.4 to f/2, where resolution and contrast increase noticeably. Beyond that, improvements are more subtle, with optimal performance reached around f/2.8.

Good news for rangefinder shooters. I did not detect any meaningful focus shift with this lens. I confirmed this using a ruler test and by comparing images shot at f/2.8 while focusing at f/1.4. The results stayed consistent, and image quality did not change in a noticeable way.

The following sequence shows the lens's performance from wide open at f/1.4 to f/5.6. The lens was focused at f/1.4, and subsequent aperture changes to f/2, f/2.8, f/4, and f/5.6 were made without refocusing, demonstrating minimal to no focus shift. I also include a comparison between crops focused at f/1.4 and stopped down f/2.8 versus images focused at the shooting aperture.


At 0.7m MFD using LiveView

***Expand the browser window to view the full image without any resizing.




MFD: f/1.4 (LEFT) | f/2 (RIGHT)






MFD: f/2 (LEFT) | f/2.8 (RIGHT)






MFD: f/2.8 (LEFT) | f/4 (RIGHT)






MFD: f/4 (LEFT) | f/5.6 (RIGHT)






Focused at f/1.4 and stopped down to f/2.8 vs focused at f/2.8




Dec 23, 2025 at 02:24 PM
Fred Miranda
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p.3 #15 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review






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Samples 4

Shot wide open in the early morning and late afternoon at various distances with the Leica M10-R, except for the sunstar samples which were shot at f/8. Some ghosting and flare behavior is also visible.

Images are straight out of the camera using the Color profile with added sharpening and no other corrections applied.
























  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/750s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/4.0    1/60s    320 ISO    +1.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/2000s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/3000s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/3000s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/4000s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/4000s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/3000s    100 ISO    0.0 EV  




Dec 23, 2025 at 03:04 PM
DandA123
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p.3 #16 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


nehemiahphoto wrote:
@DandA123@ I have the same experience and thoughts as you largely. Except 2 distinctions:

1) I have been under the impression that the FLE and Pre-FLE ASPH drew much more similarly to each other than the either of them draws to the original AA that this LLL replica is based on. I hope that's true. But I am not firm on this thought--it's been several years since I researched it. While there were comps, they were not of the exhaustive quality that we have come to expect in 2025. Does anyone have comps/links of the original ASPH to the Pre-FLE?

2) I
...Show more

I think our thoughts regarding the Leica 35mm f1.4 pre FLE vs the FLE are quite similar, but we are coming at it from slightly different direction. It's well established currently that the Leica 35mm f1.4 pre Asph is a character type lens especially when shot at f1.4 up to f2. Next in line for production was the Leica AA. I have no experience with one....well let me take that back. I was in a camera store when they received their very 1st one from Leica. I watched a customer take it out of the box to look at it and I got to hold it for a couple minutes. Back in the box it went, and I even had the chance to purchase it. Little did I know.

OK, back to what I was saying....whereas the Leica 35mm f1.4 pre asph is on one end of the spectrum in terms of being a character lens, the Zeiss ZM f1.4 is on the other (as you pointed out) with its near impeccable modern performance mostly throughout its range
From what I've read and seen regarding Leica's AA, I hold the opinion that it stands on its own and although not considered a character lens, it does have a lovely combination of performance and characteristics and thus how it "draws".

Next comes the Leica 35mm f1.4 pre FLE, which again only knowing what I've read and seen with the AA, my feeling is the Leica pre FLE aside from its noticeable focus shift (and the effect it has on an image if not compensated for) may not quite have quite the level of performance as the AA, especially central and edge sharpness when shot between f1.4 and f2.8 and also distortion characteristics. This is of course conjecture on my part. Then comes the Leica FLE, which I found to be sharper centrally and along the edge when shot wide open to approx f2.8 when compared to the Leica pre FLE and also had increased contrast and a more modern look to its images. Its bokeh though especially at infinity, often left something to be desired.

Where does the new LLL lens fit in? In my admittedly early opinion, I feel from what I've seen so far, that the LLL lens may be somewhat between the Leica AA and Leica pre FLE or put another way, between the AA and FLE. Unless there is a well-controlled side by side test of all these additional lenses, it then thus becomes mostly speculation.

I understand your using two 35mm lenses to cover the attributes of having a character lens (such as the Leica 35mm f1.4 pre ASPH and a high performance modern one such as the Zeiss Zm 35mm f1.4 lens. For me, the Leica 35mm f1.4 pre FLE was/is an excellent compromise "all arounder", demonstrating a well-defined signature with good overall performance and a lovely draw with character. One could say "not too cold, not too hot..."just right"! Yes, it had faults but far from fatal.

It may turn out in its own way, that the new LLL lens also has an excellent balance of attributes compared to all the lenses we've discussed in this thread...just with its own set of desirable characteristics and that in itself is a very good thing. So far I am extremely impressed with what I've been seeing so far in Fred's testing and truly appreciate his effort as usual.

Dave






Edited on Dec 23, 2025 at 06:24 PM · View previous versions



Dec 23, 2025 at 03:32 PM
_jim_
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p.3 #17 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


These look fantastic! The subject separation is tangible (though, I am afraid to use the term 3D after looking at that thread).


Dec 23, 2025 at 03:35 PM
DandA123
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p.3 #18 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


_jim_ wrote:
If you still have your FLE, I have a pre-FLE - let's meet up and we can compare.


As you both know, like the Zeiss ZM 50mm f1.5 Sonnar, the Leica 35mm f1.4 pre FLE suffers from very noticeable focus shift and thus any testing of these lenses either has to be done on mirrorless to eliminate this factor from influencing results or compensate for it if testing such lenses on a non mirrorless camera. If owning either of these lenses, one can have them adjusted by a qualified tech to achieve best focus at around f2.2. This way instead of the hugh leap in focus shift going from wide open to apprx f4.5....there will be instead a much smaller front focus when shot at f1.4 and then again, a much smaller back focus going from f2.2 to f4.5, thus minimizing focus shift




Dec 23, 2025 at 03:43 PM
ZdevilH1
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p.3 #19 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review


I can see this lens being a great asset to Black and White photography.


Dec 23, 2025 at 04:00 PM
Fred Miranda
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p.3 #20 · Light Lens Lab 35mm f/1.4 Aspherical "11873" Review






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Samples 5

Shot wide open at various distances with the Leica M10-R, mostly featuring people.

Images are straight out of the camera using the Standard profile, with added sharpening and no other corrections applied.




  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. 11873 lens    35mm    f/1.4    1/60s    1250 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/4000s    100 ISO    +0.3 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/4000s    100 ISO    +0.3 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/2.0    1/1000s    100 ISO    +0.3 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/60s    400 ISO    +0.3 EV  






My brother in law and me. I focused, and my wife took this shot at f/2.8.

  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/2.8    1/180s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/125s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/60s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/60s    2000 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/1500s    100 ISO    0.0 EV  






  LEICA M10-R    Summilux-M 1:1.4/35 ASPH. lens    35mm    f/1.4    1/60s    400 ISO    0.0 EV  




Dec 23, 2025 at 06:32 PM
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