Difference between revisions of "Bronica GS-1"
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| − | A lens- or [[leaf shutter|leaf-shutter]] camera, the GS-1 will synchronize flash at all available shutter speeds. Lenses are designated 'PG', with available focal lengths of 50, 65, 80, 100, 110, 150, 200, 250, 500 mm, and two teleconverters (1.4× and 2×). At the introduction of the camera, only the 50, 65, 100, 150, 200 and 250mm lenses were available, with a 110mm, 350mm (never released) and 500mm being announced<ref>PHOTOGRAPHIC INDUSTRIES vol. 41 no. 9 '83 p. 83</ref>. The 80mm was the last of the GS-1 lenses, introduced in 1997, and is difficult to find. The lenses have comparable or better close focusing distances than [[Hasselblad]] or [[Pentax 6x7]] lenses, but less than bellows focusing cameras, such as the [[Mamiya RZ67]]. Extension tubes of 18mm and 36mm are available for specialized close focus photography, and the 110mm macro with 36mm extension tube goes to 1:1. Fotodiox makes adapters for mounting PG-lenses on [[Mamiya M645]], [[Pentax 645]], [[Nikon F]], [[Canon EF]], [[Pentax]] K and [[Sony]] Alpha mounts. | + | A lens- or [[leaf shutter|leaf-shutter]] camera, the GS-1 will synchronize flash at all available shutter speeds. Lenses are designated 'PG', with available focal lengths of 50, 65, 80, 100, 110, 150, 200, 250, 500 mm, and two teleconverters (1.4× and 2×). At the introduction of the camera, only the 50, 65, 100, 150, 200 and 250mm lenses were available, with a 110mm, 350mm (never released) and 500mm being announced<ref>PHOTOGRAPHIC INDUSTRIES vol. 41 no. 9 '83 p. 83</ref>. The 80mm was the last of the GS-1 lenses, introduced in 1997, and is difficult to find. The lenses have comparable or better close focusing distances than [[Hasselblad]] or [[Pentax 6x7]] lenses, but less than bellows focusing cameras, such as the [[Mamiya RZ67]]. Extension tubes of 18mm and 36mm are available for specialized close focus photography, and the 110mm macro with 36mm extension tube goes to 1:1. While the lens flange is different from the SQ-mount, the focal flange distance of 85mm is the same<ref>PHOTOGRAPHIC INDUSTRIES vol. 41 no. 9 '83 p. 80</ref>. Fotodiox makes adapters for mounting PG-lenses on [[Mamiya M645]], [[Pentax 645]], [[Nikon F]], [[Canon EF]], [[Pentax]] K and [[Sony]] Alpha mounts. |
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Revision as of 20:33, 10 December 2016
Introduced in 1983, the Bronica GS-1 in 6×7 cm format was the largest SLR produced by the company. The camera was discontinued in 2002.
Design
The camera was designed to be as compact and light as possible, and weighs less than some of the smaller format Bronicas. It is a completely modular camera, with several optional focusing prisms and viewfinders (with and without exposure metering), lenses, and film backs. The GS-1 had a rotary prism that was metered for averaging and spot. The rotary prism made the 6x7 framing for vertical or horizontal very easy. By default the camera came with a plain matte focusing screen.
Lenses
|
| Lens block chart image by PHOTOGRAPHIC INDUSTRIES vol. 41 no. 9 '83 p. 82 (Image rights) |
A lens- or leaf-shutter camera, the GS-1 will synchronize flash at all available shutter speeds. Lenses are designated 'PG', with available focal lengths of 50, 65, 80, 100, 110, 150, 200, 250, 500 mm, and two teleconverters (1.4× and 2×). At the introduction of the camera, only the 50, 65, 100, 150, 200 and 250mm lenses were available, with a 110mm, 350mm (never released) and 500mm being announced[1]. The 80mm was the last of the GS-1 lenses, introduced in 1997, and is difficult to find. The lenses have comparable or better close focusing distances than Hasselblad or Pentax 6x7 lenses, but less than bellows focusing cameras, such as the Mamiya RZ67. Extension tubes of 18mm and 36mm are available for specialized close focus photography, and the 110mm macro with 36mm extension tube goes to 1:1. While the lens flange is different from the SQ-mount, the focal flange distance of 85mm is the same[2]. Fotodiox makes adapters for mounting PG-lenses on Mamiya M645, Pentax 645, Nikon F, Canon EF, Pentax K and Sony Alpha mounts.
| Lens | Lens construction | Filter diameter | Overall length | Diameter | Minimum focusing distance | Shutter | Weight |
|---|---|---|---|---|---|---|---|
| Zenzanon-PG 50mm F4.5 | 11 elements in 8 groups | 95mm | 74mm | 98mm | 0.5m | Seiko #0 | 790g |
| Zenzanon-PG 65mm F4 | 9 elements in 7 groups | 72mm | 71mm | 87mm | 0.6m | Seiko #0 | 715g |
| Zenzanon-PG 80mm F3.5 | 8 elements in 6 groups | 72mm | 71.5mm | 87mm | 0.55m | Seiko #0 | 765g |
| Zenzanon-PG 100mm F3.5 | 6 elements in 4 groups | 72mm | 67.5mm | 87mm | 0.75m | Seiko #0 | 630g |
| Zenzanon-PG 110mm F4 | 6 elements in 4 groups | 72mm | 78.5mm | 87mm | 0.66m | Seiko #0 | 725g |
| Zenzanon-PG 150mm F4 | 5 elements in 5 groups | 72mm | 62mm | 87mm | 1.5m | Seiko #0 | 650g |
| Zenzanon-PG 200mm F4.5 | 6 elements in 5 groups | 82mm | 97.5mm | 87mm | 2m | Seiko #0 | 970g |
| Zenzanon-PG 250mm F5.6 | 6 elements in 5 groups | 82mm | 142mm | 87mm | 3m | Seiko #0 | 1200g |
| Zenzanon-PG 500mm F8 | 11 elements in 10 groups | 122mm | 307.5mm | 87mm | 8m | Seiko #0 | 3760g |
Backs
With the appropriate back, the camera will shoot a wide range of film sizes, including 6×4.5, 6×6, 6×7 cm, and Polaroid. The 6x4.5, 6×6 and 6×7 cm formats could be obtained in either 120 or 220 roll length. Unlike some other Bronicas the GS-1 never had backs for 35mm film, even though 24x69mm and 24x36mm backs were announced with the system[3]. The 6x7 back is landscape and the 645 back is vertical unless the camera is rotated.
Accessories
The GS-1 was also available with a dedicated G-1 speedlight flash and manually operated speed grip. The G-1 speedlight with the speed grip made the GS-1 the only 6x7 with TTL flash capability. According to some sources, the Sunpak MX-2D TTL module designed for older Minolta cameras also can be used with full TTL support on the Bronica GS-1.[4].
Notes
- ↑ PHOTOGRAPHIC INDUSTRIES vol. 41 no. 9 '83 p. 83
- ↑ PHOTOGRAPHIC INDUSTRIES vol. 41 no. 9 '83 p. 80
- ↑ PHOTOGRAPHIC INDUSTRIES vol. 41 no. 9 '83 p. 83
- ↑ Photo.net post regarding Adorama comment
Links
- Bronica Users Group (BUG) at the Yahoo Groups site
- GS-1 information from the medfmt.8k.com website (archived copy from the Internet Archive, from March 2011; mostly an archive of even older bulletin board-based discussion, with a few pictures).
