Review of the Voigtlander 35mm F2 Ultron – a contender to the Leica 35mm F2 Summicron ASPH?


Mention the name “Leica” and the M-rangefinder comes to mind. Leica is synonymous with excellent optics through which they justify their sky-high prices and I do agree that their optics are excellent, and in some cases, inspiring to use.

M10 with the 35 Summicron ASPH I, the lens sells for USD3795 (or SGD5000 in my country)

And of course, third-party manufacturers like Zeiss, Voigtlander, TTArtisan, and even recently, Light Lens Labs (it is a long list) understand that not every M-rangefinder owner can splash out the equivalent of a house in some countries for a coveted Leica M lens and have sought to provide their own equivalents for the users however earlier attempts though well-intentioned were only occasionally well-executed.

Voigtlander 35mm f2 Ultron, Leica M10

But, the purpose of this review is to share my opinion that I may have made a mistake (in life it is important to be humble) in assuming that third-party M lenses must be lacking in some way due to their much lower prices and to share about how the Voigtlander 35mm f2 Ultron lens has deeply impressed me, espeically so for an M-mount lens easily one-fifth (or 20%) the cost of a Leica 35 Summicron ASPH v1.

For modern third-party M lenses, being cheaper than Leica does not necessary imply they are inferior

Enter the Voigtlander 35mm f2 Ultron

*there are two versions of this lens, and they only have aesthetic/ergonomic differences and share the same optical formula. The one I have is Version 1 with the focusing knob instead of a tab.

To start, this lens is immensely well-built with all-metal construction, the Voigtlander 35mm f2 Ultron feels as solid as the Leica 35 Summicron ASPH v1. Voigtlander includes one aspherical element at the rear of the nine elements in seven groups construction to minimize spherical aberrations and distortions. The Leica 35mm Summicron ASPH ver 1 instead has a seven elements in five groups construction with one aspherical element too.

The Voigtlander is a 2019 lens design formula while the Leica is a 1996 lens design formula.

The 35mm Summicron ASPH v1 and the Voigtlander 35mm f2 Ultron

One huge advantage the Voigtlander 35mm f2 Ultron has is its significantly shorter minimum focusing distance of 0.58 meters vs the Leica 35 Summicron’s 0.70 meters. Weight-wise to be honest both are tiny and light and one should probably not be in photography if one deigns either heavy. The Voigtlander 35mm f2 Ultron has a 10-bladed aperture design while the Leica 35mm Summicron ASPH v1 has an 8-bladed aperture design.

The 35mm f2 Ultron is presented in a sleek silver and black design profile, with engraved markings on it. The aperture ring turns with a click and the focusing ring with a buttery smooth feeling and the right amount of resistance. Holding it, I know this lens will last me a good number of years.

Performance and Handling

Voigtlander 35mm f2 Ultron, Leica M10

From my experience, the Voigtlander 35mm f2 Ultron appears to be basically distortion-free, with minimal or basically nil chromatic aberrations, similar to the much loved Leica 35mm Summicron ASPH v1.

Voigtlander 35mm f2 Ultron, Leica M10
Voigtlander 35mm f2 Ultron, Leica M10

The rendering is sharp across with pleasant corners, which was a surprise to me. A hallmark of a well-designed lens, both lenses are sharp in the center at f2. The Voigtlander 35mm f2 Ultron retains resolution even into the corners but it does seem to exhibit a sort of glow around bright objects (in the corners). The sweet spot seems to be around f2.8 to f4, where it is basically perfect.

Voigtlander 35mm f2 Ultron, Leica M10

The distinctive Leica pop thanks to the beautiful M10 sensor is well presented, with details beautifully reproduced.

Voigtlander 35mm f2 Ultron, Leica M10
Voigtlander 35mm f2 Ultron, Leica M10

‘Bokeh’ rendition was smooth and to my liking.

Some users have mentioned that the Ultron renders out of focused backgrounds more ‘busily’ in comparison to the Summicron but my take on ‘bokeh’ is always that it is very subjective and personal and in my case, I like how the lens renders the out-of-focused areas and moves smoothly yet ‘surely’ to the focused areas with a crisp separation.

Voigtlander 35mm f2 Ultron, Leica M10

Vignetting when shooting wide-open is present but very mild, and obviously easily managed in post processing. At some points, I had the feeling the 35mm f2 Ultron had a cooler rendering versus the 35 Summicron ASPH v1 but I was not able to see this as a consistent trait.

Using the Voigtlander 35mm f2 Ultron for street shooting also proved to be enjoyable. While the focusing knob design of version 1 may prove to be an issue for some who are used to managing a focusing tab, the version 2 comes with a focusing tab hence it is more of a matter of choice rather than availabilty.

Tab vs Knob

The focusing throw and using zone focusing on the lens was basically akin to using a Leica lens.

Voigtlander 35mm f2 Ultron, Leica M10
Voigtlander 35mm f2 Ultron, Leica M10
Voigtlander 35mm f2 Ultron, Leica M10
Voigtlander 35mm f2 Ultron, Leica M10


For a lens smaller, lighter, cheaper than the Leica equivalent, the Voigtlander 35mm f2 Ultron impresses not only with its build but also with its optical performance, easily pitting it toe to toe and in some aspects slightly edging it forward.

It is important that I highlight that I am not putting Leica down in any way here, Leica’s optics quality and design are still Leica-distinctive beautiful, and excellent. Instead, my aim here is to not be a prude of a purist and share that there are also excellent options available for the M-rangefinder user where there is a beautiful match of price and performance.

The 35mm f2 Ultron is smaller, lighter, 440% cheaper with a comparable level of optical performance.

price versus the 35mm Summicron APSH, USD3795 vs USD699. If versus the 35 Summicron APO, it will be USD699 versus USD8195

For now, a big issue with third-party lenses is the huge variety of possible choices across a full range of prices. Not all are gems is also a reason why some users do not embrace the third-party lenses. For example, a 7Artisans 35mm f2 for M-mount costs USD289 vs Leica’s USD3795’s equivalent.

In all, while the Voigtlander 35mm f2 Ultron may be surpassed by Leica’s 35mm Summilux FLE (USD5995) or the 35mm f2 APO (USD8195/SGD12,000), at its price point of USD 699, one can hardly find any fault with its performance and this lens will be one I will be using on my Leica M10.

Thank you for reading.


  1. The Leica M10 is my personal set and running firmware version
  2. All images shared are shot by me in DNG and processed in LR CC Classic to my preferences. All product shots were shot by me on the Nikon Z6 II.
  3. I take pride in not being a writer who earns through selling affiliate links etc and as such, am able to provide a neutral point of view. The best way to support me will be sharing my reviews, for which I am very thankful for.

11 Replies to “Review of the Voigtlander 35mm F2 Ultron – a contender to the Leica 35mm F2 Summicron ASPH?”

  1. Hello Keith. I have embarked upon film photography some time ago and I have not kept in touch with your blog. Having purchased several Leica film cameras recently I stumbled upon your review of this lens. I agree wholeheartedly that lens options for Leica camera bodies should embrace 3rd party options. Case in point, I purchase a Zeiss 50mm F1.5 Sonnar to pair up with my M3. Early images including portraiture results have stirred a feeling in me; a feeling that I have achieved the tonalities , image rendering and emotional reasonance I’ve been looking for in image output for a long time. These lenses especially the lens you reviewed render images differently on a film plane as compared to digital cameras. The Ultron 35mm F2 has been compared in terms of results to one of the early Summicrons namely the 6 element 35mm F2. I do realise your blog is largely if not entirely related to digital photography. Speculation and preferences play a large role in keeping myths and hearsay alive concerning which element Summicrons are best. I have plans to pair the Ultron 35mm F2 with my Leica MP soon. Thank you for the review and the sample pictures are testament to you innate insights in lens selections.

    Liked by 1 person

    1. Hi Gireesh, wow. Thank you for sharing your experience.

      Yes , I do emphasize that as an user it will be good to venture beyond Leica lenses (not that they aren’t great) but the world of options outside present really good alternative options.

      I really compared side by side the 35 Cron ASPH V1 and the Ultron 35/2 on the M10 and was hard pressed to find any differences.

      While there may be some call ‘leica-purists’ which I fully respect, I am glad to hear from you as another person open minded enough to look at other options 🙂


      1. Hello Keith. I went off on a tack and bought the Voigtlander 35mm F2.5. It’s been excellent value for money and the small size paired with my Leica MA seems to be a match well paired. Perhaps you should review this lens if you have the opportunity.


      2. Thank you for sharing about the Voigtlander 35mm f2.5 , I’ll keep a lookout 🙂


  2. Hello Keith. I forgot to mention. Due to the minimum focusing distance of the Ultron, on Leica rangefinders making images of near subjects may end up with blurry images. One needs to keep in mind that the minimum focusing distance of the lens is closer than the rangefinder. Comparison of digital images between the two might not show significant disparities. However I suspect when making prints beyond 20 x 30 inches one might be able to make out which lens is optically better. The ultron although relying on a vintage optical formula has been made with modern conveniences eg. Computational analysis and the summicron uou have is a refinement of an old lens. Hope to see more reviews from you soon. Keep safe and well.

    Liked by 1 person

  3. Hello keith,

    after replying to you on my review I have come to have a peek here and I like what I see!
    Nice short and to the point review!

    I’ll read more of your reviews!



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