KONICA AUTO S3
The Konica Auto S3 is a compact 35mm rangefinder camera made by Konica from 1969 to 1973. It was the last of the Auto S series, which was well regarded. It has a fast 47mm f/1.9 Hexanon lens and fully automatic exposure, aimed at amateur and enthusiast photographers of the late 1960s and early 1970s.
Overview
Konica introduced the Auto S3 in 1969 as the direct successor to the Auto S2, with refinements to both design and function. It was a premium compact rangefinder for amateurs who wanted high image quality without much manual fuss. It belonged to Konica's long line of rangefinders that began in the 1950s with models like the Konica I and ran through the Auto S series into the early 1970s.
The lens is a 47mm f/1.9 Hexanon. That is fast for a standard lens, though not the fastest on production rangefinders at the time. It suits low light and shallow depth of field. The camera has aperture-priority automatic exposure with a built-in CdS light meter that sets the shutter speed from the selected aperture. Film advance and shutter cocking are still manual. The autoexposure system was advanced for its era, and the camera had a reputation for reliability and ease of use.
Compared to the Auto S2, the S3 made several improvements: a redesigned viewfinder with brighter framelines and better parallax compensation, a more refined film advance with a shorter throw, and a revised shutter design that improved durability. It kept the compact all-metal body with leatherette covering, the top-mounted shutter speed dial and the integrated rewind crank. SLRs were growing in popularity in the late 1960s, but Konica kept refining its rangefinder line. It saw a niche market for compact, high-quality cameras with better portability and quiet operation.
Specifications
| Specification | Value |
| Type | Rangefinder |
| Film Format | 35mm (135 cartridge) |
| Years Produced | 1968–1972 |
| Lens Mount | Fixed Hexanon 47mm f/1.9 (non-interchangeable) |
| Shutter | Vertical-travel, metal-blade focal-plane shutter; speeds 1–1/500 sec + B |
| Metering | Off-the-film (OTF) CdS metering, center-weighted, measured post-exposure |
| Exposure Modes | Aperture-priority automatic exposure; manual override via shutter speed selection |
| Viewfinder | Combined optical viewfinder and rangefinder patch with parallax correction; framelines for 47mm |
| Dimensions | 138 × 75 × 45 mm; ~540 g (body only, no battery) |
Key Features
- 47mm f/1.9 Hexanon lens: One of the fastest standard lenses on any production rangefinder, ideal for low-light shooting and selective focus.
- Aperture-priority autoexposure: Select aperture on lens, and camera automatically sets shutter speed (1–1/500 sec) via CdS meter.
- TTL metering: Through-the-lens, center-weighted CdS metering for accurate exposure in varied lighting.
- Compact metal body: Durable construction with smooth film advance and quiet shutter operation.
- Improved viewfinder: Brighter framelines and enhanced parallax compensation compared to earlier Auto S models.
Historical Context
The Auto S3 came out at a transitional moment. By 1969, single-lens reflex (SLR) cameras were rapidly taking over the enthusiast and professional markets, thanks to through-the-lens viewing and interchangeable lenses. Rangefinders still appealed to photographers who valued compactness, quiet operation and superior wide-angle performance. Konica had a strong reputation with its Auto S and Konica I/II/III series, and chose to refine its rangefinders rather than switch to SLRs right away.
The Auto S3 competed with premium rangefinders such as the Canon Canonet QL17 G-III and the Minolta Hi-Matic series. Its maximum aperture of f/1.9 was faster than the more common f/1.7 - f/2.0 of many competitors, which gave it an edge in dim light. It also had more precise build quality and a smoother shutter mechanism than many contemporary point-and-shoot rangefinders. Production was relatively short and ended in 1973, as Konica shifted focus to SLR development, which led to the successful Konica FS and FT series.
Users who liked its mix of automation and optical quality received it favorably. Reviews at the time praised the sharp lens, reliable metering and compact form. The rise of SLRs and the decline of rangefinder demand meant the Auto S3 became one of the last high-end fixed-lens rangefinders Konica would produce.
Collectibility & Value
Today the Konica Auto S3 is regarded as a cult classic among rangefinder enthusiasts and vintage camera collectors. The fast Hexanon lens, solid build quality and elegant design make it sought after, particularly in fully functional condition. Working units in good condition typically sell for $150 - $250, and exceptional mint examples reach up to $350.
Rarity is moderate. It is not exceptionally scarce, but working examples are getting harder to find because of age-related problems such as shutter degradation, light seal deterioration and CdS meter failure. Buyers should check the shutter at all speeds, look for haze or fungus in the lens, and make sure the meter responds to light (the original mercury battery needs modification to work with modern PX625 alternatives). The camera uses a single 1.35V mercury battery, now obsolete, so many users retrofit zinc-air replacements or adapters.
Common issues are sticky shutter curtains (especially at 1/500 sec), worn film advance levers and misaligned rangefinder mechanisms. Rangefinder calibration takes precision, so repairs should go to technicians experienced with Konica's optical systems.
Similar Cameras
- Canon Canonet QL17 G-III – Comparable aperture-priority rangefinder with 40mm f/1.7 lens; slightly more compact and mass-market oriented.
- Minolta Hi-Matic 9 – Features 45mm f/2 Rokkor lens and aperture-priority AE; known for robust build and excellent metering.
- Yashica Electro 35 GSN – 45mm f/1.7 lens, fully electronic shutter; popular for its reliability and bright lens.
- Fujica ST705 – Later model (1977) with 45mm f/1.9 Fujinon, but shares similar design philosophy and target audience.
- Leica CL – Higher-end M-mount rangefinder with interchangeable lenses; more expensive but shares compact form and premium build.
Repair & Maintenance
The Konica Auto S3 uses a 1.35V mercury PX625 battery, now discontinued. Modern replacements include WeinCell zinc-air or alkaline PX625 batteries, though voltage differences may affect meter accuracy. Some users install voltage-regulating adapters for consistent performance. Shutter maintenance is critical. Given the age, cloth curtains may degrade, especially at high speeds, and lubricants can dry out, leading to inconsistent shutter timing. The CdS meter is prone to failure from aging components or corrosion, and recalibration may be necessary. Rangefinder alignment should be checked periodically, as impacts can throw the focusing patch out of calibration. Regular use, proper storage and light seal replacement every 10-15 years are recommended for long-term preservation.
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