CANON FT QL

Name: Canon FT QL
Brand: Canon

The Canon FT QL is a 35mm single-lens reflex (SLR) camera introduced in 1966 as Canon’s first SLR to feature the innovative Quick Load film loading system. Designed as a bridge between amateur and professional photographers, it combined advanced metering technology with user-friendly film handling, marking a significant step in Canon’s evolution toward modern SLR design.

Overview

Released in October 1966, the Canon FT QL was positioned as a mid-tier SLR aimed at serious amateur photographers and advanced enthusiasts during a period of rapid innovation in the Japanese camera industry. It succeeded the Canonflex series and preceded the highly influential Canon F-1, serving as a technological testbed for features that would become standard in later models. The FT QL was notable for being the first Canon SLR to incorporate through-the-lens (TTL) center-weighted metering, using a CdS (cadmium sulfide) cell to measure light reflected off the focusing screen. This system provided more accurate exposure readings compared to external meters or clip-on accessories common at the time.

One of the FT QL’s most distinctive features was its "Quick Load" (QL) system, which simplified film loading by automatically advancing the leader to the take-up spool upon closing the back—eliminating the need to manually thread film. This feature, later adopted by other manufacturers, significantly reduced user error and made the camera more accessible to less experienced photographers. The FT QL accepted both Canon’s FL and the newer FD lenses (via stop-down metering), offering compatibility with a growing range of high-quality optics. Despite its advanced features, the FT QL retained a fully mechanical shutter, ensuring functionality even without batteries, although metering required power.

The camera was part of Canon’s transition from rangefinder dominance to SLR leadership and helped establish the company’s reputation for innovation. It was succeeded in 1971 by the Canon FX and later the F-1, which built upon the FT QL’s foundation with improved durability and professional-grade construction.

Specifications

Specification	Value
Type	35mm Single-Lens Reflex (SLR)
Film Format	35mm (135 cartridge)
Years Produced	1966–1972
Lens Mount	Canon FL/FD Mount (supports FL and early FD lenses; stop-down metering required for FD)
Shutter	Vertical-travel, focal-plane shutter; speeds from 1 sec to 1/1000 sec, plus Bulb (B)
Metering	TTL (through-the-lens) center-weighted CdS metering
Exposure Modes	Manual exposure only; stop-down metering
Viewfinder	Fixed pentaprism with microprism collar focusing aid and split-image rangefinder spot; ~94% coverage
Dimensions	140 mm (W) × 90 mm (H) × 54 mm (D); Weight: ~680 g (body only, no battery or lens)

Key Features

Quick Load (QL) Film System: Automated film transport upon closing the back, reducing loading time and errors.
TTL Center-Weighted Metering: First Canon SLR with built-in through-the-lens exposure metering using a CdS cell.
Mechanical Shutter with Battery-Dependent Meter: Full mechanical operation ensures shutter works without batteries; meter requires two 1.35V PX625 mercury batteries (or modern equivalents).
FL/FD Lens Compatibility: Supports Canon FL lenses natively; FD lenses can be used in stop-down mode.
Stop-Down Metering Lever: Allows accurate exposure measurement with non-automatic aperture lenses by manually closing the aperture.

Historical Context

The Canon FT QL was introduced at a time when Japanese camera manufacturers were rapidly advancing SLR technology, competing fiercely with German brands like Nikon, Pentax, and Minolta. Canon had previously focused on rangefinders and early SLRs like the Canonflex, but the FT QL represented a strategic shift toward user-centric design and electronic integration. Its release coincided with the growing popularity of interchangeable-lens SLRs among amateur photographers, who demanded both precision and ease of use.

Competitors at the time included the Nikon F (professional-focused), Pentax Spotmatic (also featuring TTL metering), and Minolta SR-T 101. The FT QL distinguished itself with the Quick Load system, which predated similar mechanisms like Nikon’s Quick Load (1980) by over a decade. While the Pentax Spotmatic (1964) beat Canon to market with TTL metering, the FT QL offered a competitive alternative with superior ergonomics and film handling. Market reception was positive, particularly in North America and Europe, where its ease of use appealed to advancing amateurs. However, its reliance on mercury batteries—now obsolete—has created long-term usability challenges.

Collectibility & Value

Today, the Canon FT QL is regarded as a historically significant model among vintage camera collectors, particularly those interested in the evolution of Canon SLRs or early TTL metering systems. While not as rare as the Canon Pellix or Canonflex, it remains less common than contemporaries like the Pentax Spotmatic, contributing to moderate collector interest. In good working condition, prices typically range from $150 to $300 USD, depending on lens inclusion, cosmetic state, and meter functionality.

When purchasing an FT QL, collectors should verify the shutter operation across all speeds, check for mirror bounce or sluggish return, and inspect the light seals, which often degrade after decades. The CdS meter is prone to failure due to aging cells or corrosion, and original PX625 mercury batteries are no longer available; modern alkaline or silver oxide replacements (e.g., Wein Cell) may require voltage adjustment for accurate readings. Lenses commonly paired with the FT QL include the Canon FL 50mm f/1.8 or f/1.4, which are themselves collectible. Cameras with original boxes, manuals, and accessories command premium prices.

Similar Cameras

Pentax Spotmatic (1964–1976): TTL metering, M42 screw mount, highly influential SLR with strong collector base.
Nikon F (1959–1973): Professional-grade SLR with interchangeable viewfinders and extensive lens support.
Minolta SR-T 101 (1966–1971): Robust build, CLC metering, and reliable mechanical performance.
Yashica TL Electro-X (1970): Electronic shutter with CdS metering, part of Yashica’s high-end SLR line.
Topcon RE Super (1963–1971): Advanced TTL metering and high-quality optics, favored by professionals.

Repair & Maintenance

The Canon FT QL uses two 1.35V PX625 mercury batteries to power its CdS meter, though modern alternatives such as the Wein Cell MRB625 (mercury-free) or adapters for 1.5V SR44 batteries are commonly used. Voltage mismatch can lead to overexposure, so use of a step-down adapter or meter recalibration is recommended. The camera’s mechanical shutter does not require batteries, making it functional even with a dead meter.

Common issues include degraded light seals (causing light leaks), sticky shutter curtains at slow speeds, and oxidation on battery contacts. The Quick Load mechanism is generally reliable but may jam if foreign debris enters the film chamber. Regular CLA (clean, lubricate, adjust) servicing by a technician experienced with vintage Canon SLRs is advised every 5–10 years for consistent performance. Replacement parts are limited but available through specialized vintage camera suppliers or donor bodies. The viewfinder screen can be replaced, though original types are preferred for authenticity. Overall, the FT QL is considered moderately repairable with proper tools and knowledge.