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Leica Society International Inspiring Leica photographers since 1968 We honor the power of images to witness our world and, if possible, improve it.

Leica Society International is the most robust global community and gathering place for Leica photographers, collectors, and enthusiasts. Whether you are a current Leica owner or aspire to own one someday, join our community who appreciates the special distinction that the Leica camera system carries and shares a passion for Leica photography, cameras, and comradery. We are a community united by a brand representing the pinnacle of engineering and art. We are dedicated to:

[🔴] Inspiring Leica photographers
[🔴] Preserving Leica’s rich history
[🔴] Educating members
[🔴] Supporting the next generation of photographers

Join Leica Society International today: bit.ly/JoinLSIFB

Enter the 2026 LSI Sweepstakes, Save the Dates for 2027 Events, and more in the latest Leica Society International newsl...
10/12/2026

Enter the 2026 LSI Sweepstakes, Save the Dates for 2027 Events, and more in the latest Leica Society International newsletter: https://bit.ly/4AZvegi

All the latest from Leica Society International

🔴 2026 LSI Sweepstakes 🔴Enter now for a chance to win one of two incredible prizes:- Grand Prize: Leica M EV1 (camera bo...
10/09/2026

🔴 2026 LSI Sweepstakes 🔴

Enter now for a chance to win one of two incredible prizes:

- Grand Prize: Leica M EV1 (camera body only)
- Second Prize: Oberwerth M Camera Bag

Tickets can be purchased through October 30: https://bit.ly/4h9isnM

🔴 Now Open — 2026 LSI Sweepstakes 🔴Enter now for a chance to win one of two incredible prizes:- Grand Prize: Leica M EV1...
09/26/2026

🔴 Now Open — 2026 LSI Sweepstakes 🔴

Enter now for a chance to win one of two incredible prizes:

- Grand Prize: Leica M EV1 (camera body only)
- Second Prize: Oberwerth M Camera Bag

Tickets can be purchased through October 30: https://bit.ly/4h9isnM

How Leica sunk the Kwanon, a Leica II copy, without firing a shot! Leitz didn’t require espionage; they read all about i...
09/24/2026

How Leica sunk the Kwanon, a Leica II copy, without firing a shot! Leitz didn’t require espionage; they read all about it in Asahi Camera!
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In November 1933, Yoshida Gorō and Uchida Saburō (last names first per Japanese tradition) founded Seiki Kōgaku Kenkyūjo (Precision Optical Instruments Laboratory) in a small streetside shop in Tokyo. From these humble beginnings, the fledgling enterprise steadily evolved into the colossus we now know as Canon.

Yoshida and Uchida soon embarked upon the audacious project of producing the first focal plane shutter rangefinder 35mm camera made in Japan. To that ambitious end, Yoshida (1900-1993) disassembled a Leica II (Model D) and carefully studied its inner workings. When later asked about his motivations for taking the Leica apart, he stated forthrightly that he’d had no specific plan in mind other than looking at each part and seeing how it was made. “The parts were made from brass, aluminum, iron, and rubber,” Yoshida noted, “and I was surprised that when these inexpensive materials were put together into a camera, it demanded an exorbitant price. This made me angry.”

The Kwanon of 1934: A Japanese Leica II with a few unique touches
Evidently, Yoshida channeled his anger into creating the Kwanon, a slightly revised interpretation of the Leica II (Model D) that was produced in several prototype variants (distinguished by unmarked letters A To X). They may never have gone beyond prototypes and were never marketed by Seiki Kōgaku. Only four variations appeared in advertisements, including the sole surviving specimen of a Model X (shown here) in the Canon Camera Museum. Most of these Kwanon prototypes included the following features common to the Leica II (Model D): a 39mm “Leica” screw mount, an interchangeable collapsible 50mm f/3.5 Tessar-type lens, a rangefinder coupler consisting of a spring-loaded pivoting arm with a roller at the end, a horizontal cloth focal plane shutter with timed speeds of 1/20 to 1/500 sec, and a short-base, high magnification rangefinder and a small inverse Galilean viewfinder each with a separate eyepiece.

Other core Kwanon features

- Every variant was fundamentally modeled after the Leica II (Model D) rangefinder camera. All featured the distinct layout of a 35mm rangefinder coupled system with basic physical shapes adapted from European counterparts.
- Unlike the completely rounded ends found on all Barnack Leica bodies, all configurations of the Kwanon body utilized distinctly angled, sharp corners, each in the form of a half hexagon. This minor frame styling choice set the archetype that was carried over into later screw-mount Canon production models.
- Every model was engineered to support interchangeable optics centered around the Kasyapa lens—a 4-element, 3-group 50mm f/3.5 utilizing internal components built in partnership with Nippon Kogaku (later known as Nikon).
- Since Yoshida was a devout Buddhist, the conceptual core of every iteration of the Kwanon was tied to the Buddhist Goddess of Mercy (Kwannon) and her disciples, which included Kasyapa. Even as physical designs shifted from tube-divided top plates to flat ones, this core identity remained unchanged.

When Leitz Wetzlar became aware of the Kwanon and its features based on the 1934 announcements published in Asahi Camera magazine, it did not file a formal lawsuit or take legal court action against Seiki Kōgaku, though Leitz did take preliminary steps to protect its intellectual property in Japan.

In the fall of 1934, Leitz officially registered its Leica patents in Japan and began taking initial administrative steps to enforce them vis-à-vis the Kwanon, a camera (albeit a prototype) that featured a viewfinder and rangefinder coupling system that directly infringed on Leitz's newly registered Japanese patents. When Leitz's Japanese distributor, Schmidt & Company, began aggressively enforcing Leitz’s intellectual property in late 1934, the most obvious and indefensible violations on the Kwanon were its three-window top cover, lens mount, and rangefinder coupling system. Due to historical precedents and differences in shutter design between the Leica and Kwanon, Leitz did not raise allegations regarding the design of the Kwanon shutter.

Rather than engaging in a protracted legal battle they were likely to lose, Seiki Kōgaku redesigned its camera to avoid Leitz’s patents. They replaced the Leica-style integrated viewfinder with an inferior, separate pop-up/folding Albada viewfinder to work around the viewfinder patent, and they outsourced the entire optical, lens mount, and rangefinder mechanism to Nippon Kogaku (Nikon). Nippon Kogaku fundamentally redesigned these systems so that when the camera was finally commercialized in 1936 as the “Hansa Canon,” it was legally compliant and entirely avoided Leitz's Japanese patents.

How Leitz got Olympus to rename the M-1, its most audacious SLR ever. It all began with a confrontation over the letter ...
09/17/2026

How Leitz got Olympus to rename the M-1, its most audacious SLR ever. It all began with a confrontation over the letter “M” at Photokina 1972!
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The leading Japanese camera and lens manufacturers of the postwar era had a profound respect for German cameras and lenses. Indeed, German companies, particularly Leitz and Zeiss, were worshipped and venerated, and their products were widely imitated. However, during the ‘50s and ‘60s, the Japanese industry steadily evolved from making copies or derivatives of German designs and began producing brilliantly innovative cameras inspired by the Leica and Contax, such as the rangefinder Canons and Nikons.

To give you a sense of how the Japanese regarded the Leica in those days, here’s what Takeshi Mitarai, the influential founder and long-time president of Canon, said at an interview in the U.S. over 50 years ago when asked about how his Canon rangefinder cameras compared with Germany’s best. Mitarai responded calmly, with humility and reverence: “Canon made by man, Leica made by God.” That quote was popularized by the late Bob Schwalberg, the legendary American photojournalist and photographic writer, who used it to showcase the bench-assembled mechanical precision and craftsmanship of his beloved Leica Ms.

The great Olympus M-1 kerfuffle of 1972

Sometime around 1967 or 1968, Yoshihisa Maitani, the renowned chief camera designer at Olympus Camera Co. in Tokyo, initiated a development project to create a tiny, modular, lightweight, professional-caliber 35mm SLR to rival bulky systems like the Nikon F and the Canon F-1. The goal of his team was to create a rugged, reliable, mechanical 35mm SLR system based on a camera about the same size as a rangefinder Leica (yes, he was a Leica fan!). In 1972, he and his team unveiled the camera at the giant Photokina Exposition in Cologne, Germany. They named the entire lineup the “M System,” and dubbed the camera the “M-1.” While not publicly stated at the time, the “M” was evidently intended by the company to honor Maitani.

The Confrontation: To state it politely, E. Leitz Wetzlar took strong exception to this. Translation: they were furious and confronted Olympus at the show! Leica had long established (since 1954) its iconic Leica M rangefinder series and its extensive ecosystem. They felt by naming its new camera the "M-1" and calling it part of the "M-System," Olympus stepped directly on their trademarked turf and created brand confusion—especially since the new Olympus SLR was compact enough to rival a Leica M in size. Had it come to a court case, Olympus could have countered that the Olympus M-1 is a 35mm SLR that bears scant resemblance to any Leica M rangefinder camera and that the letter “M” itself cannot be subject to trademark protection.

The Resolution: Faced with an imminent trademark confrontation with Leica, Olympus quickly backed off rather than engage in a costly and protracted legal battle. Either at the 1972 Photokina show itself, or shortly thereafter during the initial rollout, the Olympus executives decided to “prepend” (a great word!) the letter "O" (for Olympus) to the model designation, instantly transforming the M-1 into the OM-1 and the M-System into the OM-System. Om (or Aum) is also a sound that represents “the primordial vibration and ultimate reality of the universe” according to Hinduism, Buddhism, and other denominations, but whether that contributed to the success of the Olympus OM system is unknown. However, it had a good run. Olympus OM cameras remained in production until 2002, when the last ones, the OM-3Ti and OM-4Ti, were finally phased out, though the OM system was later used by Olympus for its Micro Four Thirds digital cameras.

The Collector’s Legacy: Because the change to OM-1 happened so suddenly after M-1 production had already begun, an estimated 50,000 to 52,000 camera bodies (and some initial matching lenses) rolled off the production lines engraved with the M-1 logo. These original, unmodified M-1 units (engraved M-1 on the top plate) are far less common than the OM-1-engraved version, but not super-rare or stupendously priced as some have claimed. You can snag a clean one in working condition with 50mm f/1.8 lens online for about $300-$500. As for the rangefinder-less Leica M1 aimed at the lab/scientific market, since only about 9,650 units were turned out between 1959 and 1964, they do qualify as rare-ish. A clean chrome Leica M1 body will set you back about $1,000 to $1,500, and a less common factory black one runs about $2,000 to $2,500.

A $450 Leica rear lens cap? Yes, but this rare cap is extraordinary! It’s a refugee from an ultra-rare red-finished 50mm...
09/10/2026

A $450 Leica rear lens cap? Yes, but this rare cap is extraordinary! It’s a refugee from an ultra-rare red-finished 50mm APO-Summicron!
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The heading of the online auction listing is commendably straightforward: “Leica 50 Apo Red Limited Edition Bottom Cap Rare.” The Buy It Now Price (no offers accepted): $450.00 plus $8.30 shipping. Description: “Only the cap left. It’s from limited red 50 apo.100% authentic Leica cap. Has some marks inside only.”

How can this be? Here’s the scoop based on chatting up a couple of leading Leica experts and scouring the internet for clues.

The Limited-Edition Red APO-Summicron (2016):

The Release: In November 2016, Leica launched its first-ever production red lens: a special red anodized finish version of the acclaimed APO-Summicron-M 50mm f/2 ASPH, said to be the world’s sharpest 50mm.

The Production: Optically identical to the classic 8-element black and silver versions, Leica limited production of the red finish APO-Summicron to only 100 units worldwide.

The Price: It debuted with an MSRP around $8,950-$9,750, packaged with matching red front and rear lens caps plus a gray cowhide case.

The matching red rear cap included with the ultra-rare, limited-edition Leica APO-Summicron-M 50mm f/2 ASPH (Red Anodized Edition) was designed with the same high-end craftsmanship as the lens body itself. Unlike standard Leica M rear caps, which are made of black plastic, this special edition cap is a premium accessory.

The construction of this specific red rear cap is as unique as its red finish. First, it is machined out of a high-grade aluminum alloy. The cap then undergoes a precise red anodization process, a chemical treatment that changes the surface structure of the metal, integrating the vibrant red color directly into the aluminum. This ensures that the color will not chip, peel, or flake off over time while providing excellent scratch resistance.

Bayonet Mount Mechanism: The inside of the cap features a precision-cut Leica M bayonet mount interface that allows it to twist smoothly and lock securely onto the lens's brass or chrome bayonet fl**ge, completely protecting the rear optical element and the 6-bit coding mechanism from dust and moisture. To avoid any metal-on-metal scraping against the lens mount, the inner locking segments are constructed or lined with high-tolerance composite materials such as polycarbonate to create a snug, protective friction fit.

Context on Rarity: This matching red front and rear cap set was exclusively packaged with the special edition lens released in late 2016. Leica only produced 100 units worldwide, making the red metal caps incredibly difficult to find or replace on the individual secondary market. Translation: If you’re lucky enough to be the proud owner of a Red Anodized Leica APO-Summicron-M 50mm f/2 ASPH and need a rear cap to complete the set, be prepared to fork over 450 smackers.

The 50mm f/2 AP0-Summicron ASPH., history (2012–Present):

Designed by Peter Karbe, Leica released the standard black version of this lens in 2012 as a highly corrected, ultra-sharp apochromatic standard prime. In November 2016, Leica announced a limited run of 100 units of this spectacular lens in a red anodized finish, marking the first time Leica offered an iconic lens in red. This red lens was famously previewed earlier by Leica Chairman Dr. Andreas Kaufmann mounted on a custom white digital rangefinder body, leading to matching limited camera releases, including the Leica M (Typ 262) aka a Leuca M (Typ 240) in Red with matching APO-Summicron. One of these outfits in mint condition sold for €48,000 (about $75,350.00 in 2026 dollars) at Leitz Photographica Auction No.32 held in 2018. What’s an outfit like this worth today? It’s hard to say, but you now know why asking a paltry $450 for that red Leica-M rear lens cap is actually rather reasonable!

What, a 36mm bright-line Leica shoe-mount viewfinder? That’s right! It’s usable as a 35mm finder, but it was made for a ...
09/03/2026

What, a 36mm bright-line Leica shoe-mount viewfinder? That’s right! It’s usable as a 35mm finder, but it was made for a sleek digital classic.
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Our historical writer, Jason Schneider, recently came across a “Leica 36mm Bright Line Finder in mint condition with original leather case.” Neither Leitz nor Leica ever made a 36mm lens, yet here was this beautiful, black-finished finder (Leica product No. 18707) clearly labeled 36mm and sporting a Leica “black dot” logo. Heck, it even came with its original leather case with an embossed Leica logo on its closure flap!

The finder was intended as an accessory for the Leica X1, a premium, large-sensor digital compact camera announced by Leica Camera on September 9, 2009. (Historical note: 9/9/09 was also the release date of the iconic M9, the first full-frame digital rangefinder from Leica). The X1 was the first compact digital camera to feature a large APS-C size sensor mated to a fixed (24mm f/2.8 Elmarit ASPH) prime lens in a retro style, analog-inspired body reminiscent of a classic Barnack or M-series Leica. To calculate the exact full-frame equivalent of a 24mm lens in the APS-C format, the multiplication factor is 1.5, so the answer is 36mm, and that’s what Leica went with, convention be damned!

History and Significance of the Leica X1:
- Launch: Released in late 2009, manufactured in Solms, Germany.
- Significance: It predated the iconic Fujifilm X100 by two years, effectively laying the groundwork for the modern premium APS-C fixed-lens compact camera segment.
- Design: Styled after classic vintage Leica rangefinders and the digital M-series, utilizing physical top dials for shutter speed and aperture.
- Legacy: Succeeded by the Leica X2 in 2012.

Specifications:
- Category: Specification Details
- Type: Premium large-sensor digital compact camera
- Sensor: 12.2 MP APS-C CMOS sensor (23.6 x 15.8 mm)
- Lens: Leica Elmarit 24mm f/2.8 ASPH (35mm equivalent: ~36mm focal length; 8 elements in 6 groups)
- Focusing Range: Normal: 60 cm to infinity; Macro mode: 30 cm to infinity
- Shutter Speeds: 30 sec to 1/2000 sec (quiet leaf shutter)
- ISO Sensitivity: ISO 100 – 3200
- File Formats: DNG RAW, and JPEG
- LCD Monitor: 2.7-inch TFT LCD (approx. 230,000 dots)
- Storage: SD/SDHC memory cards + internal memory
- Flash: Built-in retractable flash (Guide Number 5) plus hot shoe for external system units
- Battery Life: Approx. 260 exposures per charge (C**A)
- Dimensions: 60 mm × 124 mm × 32 mm
- Weight: Approx. 286 g (body only) / 315 g (with battery)

If you hanker for a Leica X1 of your own, you can snag a clean, fully functional example online for about $500 to $650 in black or silver. As for that 36mm Leica viewfinder, it’s a nice accessory for walkaround shooting with the X1, and you can also press it into service when shooting with a 35mm lens on your other Leicas. That silly millimeter discrepancy won’t make one whit of difference.

The 50mm f/1.4 Summilux-M: They got it right the second time. The first Summilux was okay, but the revised version is a ...
08/27/2026

The 50mm f/1.4 Summilux-M: They got it right the second time. The first Summilux was okay, but the revised version is a timeless classic!
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By the early 1950s, the management at E. Leitz Wetzlar realized it had to up its game if it expected to compete successfully with Japan’s rising stars Nikon and Canon and maintain Leica’s coveted position as the world’s finest 35mm rangefinder camera. The response was stunning in its brilliance and audacity. In 1953 Leitz proudly unveiled the 50mm f/2 Summicron, a lens that handily outperformed similar spec lenses from Zeiss, Nikon, and Canon, and to unleash (in 1954) the Leica M3, a stunningly advanced 35mm rangefinder camera with a bayonet mount, wind lever, and a bright finder with parallax-compensating frame lines that blew everything else into the weeds.

But the optical Wizards of Wetzlar were not finished. To maintain momentum and uphold Leica’s elite status, the Leitz team was determined to come up with something superior to the long running (1949-1960) 50mm f/1.5 Summarit, which was basically a tweaked, coated iteration of the old prewar 50mm f/1.5 Leitz Xenon, sometimes inscribed “Taylor-Hobson” to acknowledge that venerable British company’s design input. Despite its tortuous pedigree the Summarit is quite a good lens, but Leitz set out to—and ultimately created—a slightly faster 50mm f/1.4 lens that was clearly superior to the 50mm f/1.4 Nikkor-S.C, the lens that put Nikon on the map. This was no easy task and it took a good deal of effort.

By 1959 Leitz announced the first version of the 50mm f/1.4 Summilux, a further revision of the Summarit optical design, but, ultimately, it didn’t meet their (and many user’s) expectations. So, about 2 years later in 1961 it was replaced by the 50mm f/1.4 Summilux-M II (version 2), a radical redesign created by the legendary Dr. Walter Mandler. The switch took place beginning at serial number 1844001, so any 50mm Summilux lens with a lower serial number was constructed using the older, less desirable, optical formula.

The 50mm f/1.4 Summilux-M II is a timeless classic that reigned supreme for 43 years (in various configurations and finishes but using the same 7-element, 5-group optical formula) as the best 50mm f/1.4 lens in the world until the introduction, in 2004, of the current king of the hill, the 50mm f/1.4 Summilux-M ASPH. (an 8-element, 5-group, floating-element design with one aspheric element). The non-aspheric 50mm f/1.4 Summilux-M II was and is a great lens and a stunning achievement.

Many thanks to leading Leica authority James L***r for providing all the images accompanying this post.

In celebration of World Photography Day (August 19), the Bicentennial of Photography (1826–2026), and the upcoming 100th...
08/25/2026

In celebration of World Photography Day (August 19), the Bicentennial of Photography (1826–2026), and the upcoming 100th year presence of Leica cameras in the Philippines (1927–2027), Leica Society International (LSI) is delighted to announce the establishment of the LSI Local User Group (LUG) Philippines.

The LSI LUG Philippines opens up opportunities for local and international competitions, meet-ups, exchanges, and other activities built around the shared love for photography and passion for Leica culture.

To know more about Leica Society International, visit leicasocietyinternational.org.

Leica Society International

Affordable Leica collectibles in a Flash? Try these cool flashbulb classics! They’re beautifully made and still work if ...
08/20/2026

Affordable Leica collectibles in a Flash? Try these cool flashbulb classics! They’re beautifully made and still work if you find the bulbs & batteries.
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It seems hard to believe now, but the very first Leica camera with built-in flash sync was the Leica IIIf black dial of 1950. Before that, Leica fans had to rely on bulb-type flash units based on the “open flash” system—setting the shutter on B (Z on early Leicas) or a very slow shutter speed to ensure that the focal plane shutter was fully open while the (long peak) flashbulb fired. Both Leitz New York and Leitz Wetzlar supplied bulb-type flash units, and today these exquisitely crafted Leitz/Leica retro flash units are among the most affordable of Leica collectibles.

You’ll find the complete story of Leica flash equipment covered in exhaustive detail by going to James L***r’s Leica, An Illustrated History, Volume III, Accessories and perusing pages 246 to 266. For those thinking of acquiring some of this gorgeous gear for their collections, here’s a quick rundown.

The VACUB (aka the Leicaflash) — The Leitz VACUB (catalog code VACUB) was introduced in the early 1930s by E. Leitz Inc. (Leitz New York) and was the earliest flash unit designed for Leica screw-mount cameras. It featured a cylindrical battery/handle housing, a folding chromed-metal fan reflector held together with snaps, a built-in release mechanism over the shutter button, and a permanently attached flash cable. It was developed and marketed by the American branch (Leitz New York) a year before the German Wetzlar headquarters released native synchronized units like the BTLOO. The VACUB was designed during the dawn of commercial magnesium flashbulbs (such as early Osram Vacublitz and Mazda lamps) to replace dangerous flash powder.

The Leitz CEYOO flash — The Leitz CEYOO is a vintage folding flashbulb unit made by E. Leitz Wetzlar from 1950 to 1959. It weighs 6.5 ounces, uses a 22.5V battery-capacitor system, features a collapsible matte aluminum fan reflector, and accepts both screw-base and bayonet-base flashbulbs for classic Leica screw-mount and M-series cameras.

The Leitz Chico flash — The Leitz Chico (factory code DEOOC) is an ultra-compact, folding metal fan-type flashgun produced by Ernst Leitz in Wetzlar between 1954 and 1959. Designed for use with vintage Leica screw-mount cameras like the Leica IIf and IIIf, it operates on a 22.5-volt battery-capacitor system and features a collapsible fan reflector and bulb ejector.

While standard nostalgic flashbulbs like the Press 25, No. 5, M-2, screw-base No. 22, etc. are no longer being made, they too are readily available online, often at quite reasonable prices. Finding the exotic batteries that fit ancient bulb flash units can be a lot more challenging. Why bother to resuscitate an old bulb flash unit, you ask? You would not believe the amount of light some flashbulbs put out. Examples: A No. 22 bulb or Press 40 puts out 30,000-35,000 lumen-sec, equivalent to a studio monoblock flash system, and a humble Press 25 puts out as much as a portable professional strobe!

Heartfelt thanks to James L***r for providing all the illustrations and much of the background information for this post.

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