Bronica GS-1 100mm f/3.5 Zenzanon-PG Lens
The Bronica 100mm f/3.5 is a 100mm f/3.5 lens designed for Bronica GS mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Bronica GS-1 100mm f/3.5 Zenzanon-PG Lens
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Lens Overview — Bronica 100mm f/3.5
Key Features — Bronica 100mm f/3.5
100mm Standard Focal Length: Delivers a natural perspective on the 6x7 medium format frame, well-suited to portraiture and studio work.
f/3.5 Maximum Aperture: Provides practical light-gathering capability for a medium format prime, allowing subject separation and usable performance in moderately available light.
Bronica GS Mount: Purpose-built for the Bronica GS-1 system, ensuring native mechanical compatibility with GS-1 bodies without adapters.
Manual Focus Design: Dedicated manual focus ring suits the precise, deliberate shooting workflow common to medium format photography.
6×7 Medium Format Coverage: Designed to cover the GS-1's 6×7cm film frame, delivering full image circle utilization and the resolution benefits of the larger format.
67mm Filter Thread: Widely supported filter size makes it straightforward to attach polarizers, ND filters, and other accessories without step-up rings.
Lens Specifications — Bronica 100mm f/3.5
| Spec | Detail |
|---|---|
| Use Cases | Portrait, Studio, Product |
| Lens Type | Prime |
| Format | Medium Format |
| Zoom/Prime | Prime |
| Focal Length | 100mm |
| Maximum Aperture | f/3.5 |
| Camera System | Medium Format |
| Lens Mount | Bronica GS |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 67mm |
Description — Bronica 100mm f/3.5
The Bronica Zenzanon-PG 100mm f/3.5 is a prime lens designed exclusively for the Bronica GS mount, integrating natively with GS-1 medium format camera bodies. Operating in the standard focal length range, the 100mm perspective renders scenes with a natural, undistorted quality that has made this focal length a longstanding choice for portrait and studio photographers. The f/3.5 maximum aperture provides workable low-light performance and subject separation for a medium format optic.
Focusing is entirely manual, which pairs naturally with the precise, unhurried approach that medium format shooting encourages. A 67mm filter thread makes it straightforward to attach a wide range of commonly available filters. The lens weighs 600 grams, and no image stabilization is included.
For photographers already invested in the Bronica GS system, this lens represents a purpose-built standard prime with a native mount connection.
Pros — Bronica 100mm f/3.5
- ✓Standard 100mm focal length is well-suited to portrait and studio photography on medium format
- ✓f/3.5 maximum aperture offers usable light gathering for a medium format prime
- ✓67mm filter thread size is widely supported and easy to find accessories for
Cons — Bronica 100mm f/3.5
- ✗Manual focus only — no autofocus option for faster-paced shooting situations
- ✗No image stabilization, requiring careful technique or tripod use in lower light
- ✗Bronica GS mount is a closed ecosystem, limiting use to GS-system bodies only