Camera · Medium format
Bronica GS-1
1983-2002
Discontinued120Advanced
Budget 6x7 medium format
- Format
- 120
- Mount
- BRONICA PG
- Metering
- None
- Shutter
- 1/500
- Battery
- 4SR44 / PX28 (6V) x1, needed to fire the electronic shutter
- Weight
- 1830g
Battery req.
Max speed
Best for
- Budget 6x7 medium format
- Studio work
- Portrait photography
- Those wanting modular 6x7
Features
- 6x7 format (like RB67/Pentax 67)
- Modular system
- Electronic leaf shutters in the lenses
- Interchangeable backs
- Backs for 6x4.5, 6x6 and 6x7 (120 or 220)
- TTL flash metering with the dedicated speedlight
Limitations
- Bronica no longer exists
- Parts very scarce
- Less common than RB67
- Limited service options
Common issues to check
- Lens shutter failures
- Back interlock problems
- Light seals
- Mirror mechanism wear
Buying guide
The GS-1 (1983) was Bronica's 6x7 modular system, competing with the Mamiya RB67 and RZ67 as a lighter, leaf-shutter alternative (Bronica built about 22,500 bodies). The Zenzanon-PG lenses carry electronic Seiko #0 leaf shutters that talk to the body. Less common than the RB67 so parts and service are harder to find. Test thoroughly before buying.
Pricing
- Typical range
- £500 - £900
- Excellent condition
- ~£1100
Complete kit. Rarer than RB67. Indicative, no dated source.
Prices as of 2025-12. UK market, may vary.
Specifications
| Format | 120 |
| Years produced | 1983-2002 |
| Mount | BRONICA PG |
| Shutter type | Leaf |
| Shutter speeds | 16s - 1/500 |
| Flash sync | all speeds |
| Metering | None |
| Battery required | Yes (4SR44 / PX28 (6V) x1, needed to fire the electronic shutter) |
| Weight | 1830g |
| Dimensions | 106.5 x 116 x 196.5mm (with 100mm lens, 120 back and waist-level finder) |