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.
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The Mamiya M645J (1975) is the introductory model of Mamiya's M645 system — the Japanese camera industry's first commercially successful 6×4.5 cm medium-format SLR. Where the M645 1000S offers an interchangeable finder system, the J is simplified: a fixed waist-level finder, no interchangeable magazine, and a shutter range limited to 8s–1/500s. It accepts the same Mamiya 645-mount lenses as all other M645 bodies, giving the owner access to an extensive range of primes and zooms developed over the system's 30-year lifespan.
Reference
Recommended film stocks for the — format your camera takes.
C41
Kodak Portra 400 is a professional C-41 color negative film known for flexible exposure latitude, natural skin tones, and fine grain.
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Kodak Portra 160 is a professional C-41 color negative film with fine grain, soft contrast, and natural color.
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Kodak Ektar 100 is a fine-grain C-41 color negative film with saturated color and high sharpness.
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About this camera
The entry point to the Mamiya 645 system — a fixed waist-level finder, modest shutter range, and complete compatibility with the full 645 lens family.
| Field | Value |
|---|
| Format | 120 / 220 film (6×4.5 cm, 15/30 frames) |
| Mount | Mamiya 645 |
| Years | 1975–1982 |
| Shutter | 8s – 1/500s + B, vertical metal |
| Flash sync | 1/60s |
| Meter | TTL CdS center-weighted, EV 4–18 |
| Modes | Aperture-priority, Manual |
| Finder | Fixed waist-level with magnifier |
| Battery | 2× LR44 / SR44 |
| Frame size | 6×4.5 cm (56×41.5mm) |
Mamiya introduced the M645 system in 1975, marketing it as a professional medium-format camera that was smaller and lighter than 6×6 or 6×7 systems while still delivering a negative substantially larger than 35mm. The original M645 had an interchangeable magazine and interchangeable finder. The M645J was the simplified, lower-cost entry model with a fixed waist-level finder and non-interchangeable film back — though the film door can be swapped between regular (120/220) configurations. The M645 1000S (also 1975) was the higher specification sibling with 1/1000s shutter and interchangeable prism/WL finders. The system evolved into the M645 Super (1985) and M645 Pro (1992), maintaining lens compatibility throughout.
The M645J is the most affordable entry into a medium-format lens system of remarkable depth and optical quality. Mamiya's 645 lenses — including the Sekor C 80mm f/1.9, 45mm f/2.8, 150mm f/3.5, 55–110mm f/4.5 zoom, and the legendary 300mm f/5.6 — are excellent and widely available at reasonable prices. The 6×4.5 format gives a negative 2.7× larger than 35mm, with a 2:3 aspect ratio that matches standard paper sizes. The J's fixed waist-level finder suits portrait, landscape, and macro work from below or above eye level. The lack of interchangeable finder is rarely a limitation for most shooters.
Mamiya 645 mount. Key lenses: Sekor C 45mm f/2.8 (wide), 55mm f/2.8, 80mm f/2.8 (standard), 80mm f/1.9 (fast portrait), 110mm f/2.8 (excellent portrait), 150mm f/3.5 (short telephoto), 210mm f/4, 300mm f/5.6. Macro: Macro 120mm f/4. Extension tubes for macro work. Film: standard 120/220 in cassette form (no Polaroid back on the J). No winder option.
BW
Ilford HP5 Plus is a flexible ISO 400 black-and-white film with classic grain and strong push-processing tolerance.
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Kodak Tri-X 400 is a classic black-and-white film known for strong tonality, visible grain, and documentary character.
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