Head to head · specs cited · drawn to scale

Nikon FM2n vs Pentax 6×7 / 67

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 Pentax 6x7's 1760 g.
Type: FM2n has 35mm SLR; Pentax 6x7 has Medium-format SLR.
Format: FM2n has 35mm; Pentax 6x7 has 120 (6×7).

	FM2n Nikon F	Pentax 6x7 Pentax 6x7 mount
Overview
Type	35mm SLR	Medium-format SLR
Format	35mm	120 (6×7)
Lens mount	Nikon F	Pentax smc67 bayonet mount (internal and external bayonets)
Released	1984-2001	1969–1989 (original 6×7, pre-"67" rename)
Film camera
Film format	35mm	120 (6×7)
Metering	Center-weighted TTL full-aperture metering, EV 1 to 18 at ISO 100 with f/1.4 lens	none built-in (optional TTL metering pentaprism finder)
Shutter	Mechanical, titanium vertical-travel focal-plane, manual exposure only	Mechanical horizontal cloth focal-plane shutter
Shutter speeds	Mechanical 1/4000 to 1 second plus B; FM2n raised flash sync to 1/250 sec vs 1/200 on the original FM2	1 sec – 1/1000 sec, X-sync 1/30 sec
Battery	1x 3V CR1/3N lithium, or 2x 1.55V SR44 silver-oxide, or 2x 1.5V LR44 alkaline	none required for the mechanical shutter itself (4x LR44/SR44 or 1x 4SR44 battery only needed if the optional TTL metering finder is fitted)
Body & Handling
Dimensions (W×H×D)	142.5 × 90 × 60 mm	177 × 152 × 91 mm
Weight (body)	540 g	1760 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	Think Tank Mirrorless Mover 20 V2 Fits body only · View at B&H Photo Video	WANDRD Essential Camera Cube (for PRVKE 21) Fits body only · View at WANDRD

Sources

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.)”

official · Pentax 6x7 specifications: Photoethnography.com Classic Camera DB, "Technical Details" table (secondary compilation citing period technical specs, NOT a directly-sighted original Pentax manual page — the original manual PDFs at butkus.org/cameramanuals.org are scanned images with no extractable/OCR'd text, so this could not be independently verified against the primary document) · accessed 2026-07-10

“Dimensions and weight: 177x101x91mm 1.29kg w/o finder; 177x152x91mm 1.76kg w/ TTL finder [row for "6x7" model, 1969]”

Pentax 6x7 dimensions carry medium confidence (archived-source caveat on its fit page).

Open in the comparator (add a 3rd/4th body) Bags for the FM2n Bags for the Pentax 6x7 Fit checker

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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