C41
Kodak Portra 400
Kodak Portra 400 is a professional C-41 color negative film known for flexible exposure latitude, natural skin tones, and fine grain.
View profile35mm SLR
Konica Auto-Reflex1965
- Format
- 35mm
- Mount
- Konica AR
- Years
- 1965–1967
- Shutter
- 1s – 1/1000s
- Meter
- ttl-cds
The Konica Auto-Reflex (1965) is a Japanese 35mm SLR notable for one engineering first: a built-in mechanism allowing the photographer to switch between **full-frame (24x36mm)** and **half-frame (18x24mm)** format in mid-roll, without changing backs or film. Turning a selector on the camera body engaged a mask in the film gate, doubling the number of exposures per roll. This was achieved without interchangeable backs - a proprietary mechanical solution integrated into the body. The Auto-Reflex launched the **Konica AR lens mount**, which remained in production through the 1980s. The kit lens was the Hexanon AR 52mm f/1.8.
Reference
Find film for your Konica Auto-Reflex
Recommended film stocks for the 35mm format your camera takes.
ISO 400
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Kodak Tri-X 400
Kodak Tri-X 400 is a classic black-and-white film known for strong tonality, visible grain, and documentary character.
View profileC41
Kodak Gold 200
Kodak Gold 200 is a daylight-balanced C-41 color negative film with warm color, moderate grain, and a classic consumer-film look.
Develop 35mm film
Labs in our directory that process 35mm film.
Before you buy used
- **Mercury battery** - PX625 mercury cells are no longer produced. Use Wein MRB625 zinc-air cell or MR-9 adapter with a 386 silver-oxide cell; the adapter corrects the 1.55V difference.
- **Meter accuracy** - test with a known exposure; CdS cells are stable but the metering circuit can drift.
- **Half-frame mechanism** - operate both positions; the switching cam can bind from decades of disuse.
- **Slow shutter speeds** - 1s, 1/2s, 1/4s are the first to fail; test each.
- **Foam seals** - replace as standard.
- **Mirror damper** - foam behind the mirror disintegrates; a common source of mirror slap noise.
- Service: Konica AR-mount repairs handled by a small number of independent technicians; not widely supported.
About this camera
The world's first SLR switchable between full-frame 35mm and half-frame in a single camera body.
Key Specs
Frequently asked questions
- What film does the Konica Auto-Reflex use?
- The Konica Auto-Reflex shoots 35mm film.
- What battery does the Konica Auto-Reflex take?
- The Konica Auto-Reflex uses a 1x PX625 (mercury) battery.
- What lens mount does the Konica Auto-Reflex have?
- The Konica Auto-Reflex uses the Konica AR mount.
- What shutter speeds does the Konica Auto-Reflex offer?
- The Konica Auto-Reflex's shutter speeds range from 1s to 1/1000s.
- What light meter does the Konica Auto-Reflex use?
- The Konica Auto-Reflex meters with ttl-cds.
