Head to head · specs cited · drawn to scale

Nikon FM2n vs Pentax K1000

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 K1000's 620 g.
Lens mount: FM2n has Nikon F; K1000 has Pentax K.
Released: FM2n has 1984-2001; K1000 has 1976-1997.

	FM2n Nikon F	K1000 Pentax K
Overview
Type	35mm SLR	35mm SLR
Format	35mm	35mm
Lens mount	Nikon F	Pentax K
Released	1984-2001	1976-1997
Film camera
Film format	35mm	35mm
Metering	Center-weighted TTL full-aperture metering, EV 1 to 18 at ISO 100 with f/1.4 lens	CdS TTL average metering (open-aperture, match-needle)
Shutter	Mechanical, titanium vertical-travel focal-plane, manual exposure only	Horizontal-travel, rubberized silk cloth focal-plane shutter, mechanical
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	B, 1 sec to 1/1000 sec; flash X-sync 1/60 sec
Battery	1x 3V CR1/3N lithium, or 2x 1.55V SR44 silver-oxide, or 2x 1.5V LR44 alkaline	1x LR44/SR44 1.5V (meter only; camera fires all speeds without battery)
Body & Handling
Dimensions (W×H×D)	142.5 × 90 × 60 mm	143 × 91.4 × 48 mm
Weight (body)	540 g	620 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	Think Tank Mirrorless Mover 20 V2 Fits body only · View at B&H Photo Video

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 · K1000 specifications: Wikipedia (figures consistent with widely-cited manual dimensions; original manual PDFs at butkus.org/cameramanuals.org/ManualsLib are scanned images with no extractable text, and no official Pentax/Ricoh museum spec page could be located) · accessed 2026-07-10

“It is 91.4 millimetres (3.6 inches) tall, 143 mm (5.6 in) wide, and 48 mm (1.9 in) deep, and weighs 620 grams (21.9 ounces).”

K1000 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 K1000 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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