Head to head · specs cited · drawn to scale
Mamiya RB67 Pro-S vs Nikon FM2n
Every spec below is quoted from the makers' official pages — where a figure isn't published we say so rather than guess. Sizes are drawn at true relative scale from published dimensions, and the bag-fit row is computed against our measured bag catalog.
The 3 biggest published differences
- Weight (body): the FM2n leads at 540 g vs the RB67 Pro-S's 2705 g.
- Type: RB67 Pro-S has Medium-format SLR; FM2n has 35mm SLR.
- Format: RB67 Pro-S has 120 (6×7); FM2n has 35mm.
RB67 Pro-S Mamiya RB mount | FM2n Nikon F | |
|---|---|---|
| Overview | ||
| Type | Medium-format SLR | 35mm SLR |
| Format | 120 (6×7) | 35mm |
| Lens mount | Mamiya RB bayonet mount (with safety lock ring) | Nikon F |
| Released | 1974–1990 (Pro-S variant) | 1984-2001 |
| Film camera | ||
| Film format | 120 (6×7) | 35mm |
| Metering | none (no built-in meter) | Center-weighted TTL full-aperture metering, EV 1 to 18 at ISO 100 with f/1.4 lens |
| Shutter | Seiko #1 leaf (lens) shutter, 1 to 1/400 sec and T | Mechanical, titanium vertical-travel focal-plane, manual exposure only |
| Shutter speeds | 1 – 1/400 sec, T | Mechanical 1/4000 to 1 second plus B; FM2n raised flash sync to 1/250 sec vs 1/200 on the original FM2 |
| Battery | none (fully mechanical) | 1x 3V CR1/3N lithium, or 2x 1.55V SR44 silver-oxide, or 2x 1.5V LR44 alkaline |
| Body & Handling | ||
| Dimensions (W×H×D) | 104 × 144 × 228 mm | 142.5 × 90 × 60 mm |
| Weight (body) | 2705 g | 540 g |
| Weather sealing | —, not published | —, not published |
| Shutter durability | —, not published | —, not published |
| Price | ||
| Launch price | —, not published | —, not published |
| Size, to scale | ||
Front view, drawn at the same scale from each maker's published W×H (mm). | ||
| Smallest bag that fits | ||
| Body | f-stop Shallow Medium ICU Fits body only · View at f-stop | Think Tank Mirrorless Mover 20 V2 Fits body only · View at B&H Photo Video |
Sources
official · RB67 Pro-S specifications: Mamiya RB67 Pro-S original instruction manual (scan, Scribd-hosted; same text as cameramanuals.org/butkus.org scans) · accessed 2026-07-10
“Dimensions: (Camera body with roll film holder) Height: 5-21/32in. (144mm) Width: 4-3/32in. (104mm) Length: 8-31/32in. (228mm) (with 9Omm f/3.8 lens) 8-17/32in. (217mm) (with 127mm f/3.8 lens). Weight: Camera body with revolving adapter and focusing hood 3 lbs., 3-2/16 oz. (1450g); Pro-S roll film holder 15-14/16 oz. (450g); 90mm f/3.8 lens 28-6/16 oz. (805g); 127mm f/3.8 lens 26-7/16 oz. (750g)”
official · FM2n specifications: Nikon official spec page (imaging.nikon.com, archived 2018) — page titled "Nikon FM2"; body chassis/dimensions are shared with the New FM2 (FM2n) · accessed 2026-07-10
“Dimensions (W x H x D) Approx. 142.5 x 90 x 60mm (5.6 x 3.5 x 2.4 in.) / Weight (body only without batteries) Approx. 540g (19 oz.)”
Spec values are the manufacturers' published figures, compared factually — we don't rank cameras. Fit verdicts are planning estimates from published interior dimensions, not guarantees. See methodology.
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