Pentax 645N1997

History

The Pentax 645 line started 1984 with the original (manual focus). The 645N (1997) added autofocus, data imprinting (a small character LCD shows shutter speed, aperture, exposure number on the negative edge), and a refined meter. The 645N II (2001) added an internal mirror lock-up button and updated electronics. The film 645 line ended 2010 when Pentax launched the 645D digital body.

Why It Matters

The 645N is the most-recommended "first medium format AF" body. AA batteries (no proprietary cells), AF that actually works, and the 6×4.5 negative format that gives you 16 frames per roll instead of 10 (helpful when film is expensive). The smc Pentax-FA 75/2.8 kit lens is one of the best normal lenses in any medium format.

For 2026 buyers, used 645N + 75mm runs $700–900. Compared to a Mamiya RZ67 or Hasselblad system, the 645N costs less, weighs less, autofocuses, has a meter that works, and uses ubiquitous AA batteries. The trade-off is the 6×4.5 negative is smaller than 6×7 — but at scanning resolutions, the difference is largely academic.

Lenses & Accessories

smc Pentax-FA 645 lenses (with autofocus). Earlier smc Pentax-A 645 (manual focus) lenses also mount with manual focus. Notable: 75/2.8 FA (kit, excellent), 45/2.8 FA, 35/3.5 FA, 150/2.8 FA, 200/4 FA, 75-150 FA zoom. Pentax 645 backs (120, 220), data back built-in. AF400FTZ flash.

Sample Photographers / Notable Use

• Travel-photographer favorite for medium format with autofocus.
• Joel Meyerowitz has carried 645 bodies in his color work.
• Common in landscape and wedding kit lists 1997+.
• Featured in Casual Photophile as "the affordable medium format AF."

References

• Camera-Wiki: Pentax 645N
• Wikipedia: Pentax 645