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Canon 10cm 100mm f/4 Serenar LTM M39

The Canon 10cm 100mm f/4 is a lens from Canon. Check GearFocus for current availability, with buyer protection on every purchase.

Canon 10cm 100mm f/4 Serenar LTM M39

Canon 10cm 100mm f/4 Serenar LTM M39

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Lens Overview — Canon 10cm 100mm f/4

The Canon 10cm f/4 Serenar is a vintage manual focus telephoto lens manufactured between 1950 and 1959, designed for rangefinder cameras using the Leica Thread Mount (LTM / M39). As part of Canon's early Serenar lineup, this lens represents a significant chapter in the brand's optical history, produced during a decade when Canon was establishing itself as a serious contender in the precision optics market. The lens features rangefinder coupling, making it a functional match for compatible LTM-mount rangefinder bodies rather than just a decorative collectible.

It weighs 410g, which is notable for a lens of this vintage and focal length. The LTM / M39 thread mount means it can also be adapted to a wide range of modern mirrorless systems with the appropriate adapter, making it appealing not only to vintage camera collectors but also to photographers seeking a classic rendering for contemporary work. Focus is entirely manual, in keeping with the technology of the era.

With no electronic components, it operates purely mechanically, offering a tactile, deliberate shooting experience that many photographers find rewarding.

Key Features — Canon 10cm 100mm f/4

100mm f/4 Telephoto: A short telephoto focal length well-suited to portraiture and detail shots on rangefinder bodies.

Leica Thread Mount (M39): Screw-mount design fits a wide range of vintage LTM rangefinder bodies and adapts to modern mirrorless systems with a readily available adapter.

Rangefinder-Coupled Focus: Mechanically coupled to the rangefinder mechanism on compatible bodies, enabling accurate focus confirmation through the viewfinder.

1950s Serenar Optics: Part of Canon's early Serenar lens lineup, representing the brand's optical work during a formative period in its history.

Fully Manual Operation: No electronic components — the lens operates entirely mechanically, offering a deliberate, tactile shooting experience.

All-Metal Build: Solid construction consistent with precision optical instruments of the era, giving the lens a substantial feel in hand.

Lens Specifications — Canon 10cm 100mm f/4

Canon 10cm 100mm f/4 full specifications
SpecDetail
Use CasesPortrait, Street, Creative Effects
Lens MountLeica Thread Mount (LTM / M39)
Focus TypeManual Focus

Description — Canon 10cm 100mm f/4

The Canon 10cm f/4 Serenar is a manual focus telephoto lens built for rangefinder cameras using the Leica Thread Mount (LTM / M39). Manufactured during the 1950s, it belongs to Canon's historic Serenar series — an early lineup that helped define the brand's optical reputation. The lens is listed as rangefinder-coupled, meaning it interfaces directly with the focus mechanism of compatible LTM rangefinder bodies for precise focus control.

Weighing 410g, it has a substantial feel that reflects the build standards of mid-20th century precision optics. The LTM / M39 thread mount has remained popular among collectors and adaptor users alike, giving this vintage lens continued relevance on modern mirrorless systems. With no electronic components, operation is entirely mechanical — a quality that appeals to photographers who value a more deliberate, hands-on approach to image-making.

Whether used as a collector's piece or an active shooting lens, the Serenar 100mm f/4 is a genuine artifact of Canon's foundational decades.

Pros — Canon 10cm 100mm f/4

  • ✓Leica Thread Mount (LTM / M39) allows broad compatibility with rangefinder bodies and modern mirrorless systems via adapters
  • ✓Rangefinder-coupled design enables accurate focus on compatible rangefinder camera bodies
  • ✓Manufactured during the 1950s, offering genuine vintage collectible appeal and historical significance

Cons — Canon 10cm 100mm f/4

  • ✗Manual focus only — no autofocus capability for modern workflows
  • ✗LTM / M39 thread mount requires an adapter for use on most modern camera systems
  • ✗No electronic contacts, so no EXIF data or electronic communication with modern camera bodies

Resources & Downloads — Canon 10cm 100mm f/4

Manuals & Guides

Frequently Asked Questions — Canon 10cm 100mm f/4

What mount does the Canon 10cm f/4 Serenar use?+
This lens uses the Leica Thread Mount, also known as LTM or M39. It is compatible with rangefinder cameras that accept this mount and can be adapted to many modern mirrorless systems using a third-party LTM adapter.
Is this lens rangefinder-coupled?+
Yes, the specifications list it as a rangefinder-coupled lens. This means it will couple with the rangefinder focus mechanism on compatible LTM-mount rangefinder bodies for accurate focus confirmation.
When was this lens manufactured?+
According to the specifications, this lens was manufactured between 1950 and 1959, making it a genuine vintage piece from Canon's early optical production era.
How heavy is the Canon 10cm f/4 Serenar?+
The lens weighs 410g, as listed in the specifications. This is a consistent figure with no variable weight range, indicating a fixed construction.
Can this lens be used on modern cameras?+
The lens itself is manual focus with no electronic components. While it is designed for LTM / M39 rangefinder cameras, it can typically be adapted to modern mirrorless cameras using an appropriate LTM adapter, though no autofocus or electronic features would be available.
Does this lens have autofocus?+
No. The specifications confirm this is a manual focus lens, consistent with all optics produced during its manufacturing period of 1950–1959. Focusing must be done manually by the photographer.

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