Medium Format120
intermediateadvancedprofessional
Discontinued
Pentax 645N / 645NII
1997-2006
AF medium format shooting
Format
120
Shutter
1/1000
Max speed
Metering
TTL
Battery req.
Weight
1100g
Best For
- AF medium format shooting
- Wedding photography
- Portrait photographers
- Action where AF helps
Features
- Autofocus (3-point)
- 6-segment matrix metering
- Built-in motor drive (2fps)
- Film insert system
- Multiple exposure mode
- 645NII adds mirror lock-up
Limitations
- AF slower than 35mm systems
- Still uses insert backs
- Heavy
- 6x4.5 smallest MF format
Common Issues to Check
- AF motor failure
- Film insert mechanism jams
- Battery contact issues
- Rubber grip deterioration
- Mirror damper wear
Buying Guide
The 645N added autofocus to medium format affordably. The 645NII (2001) added mirror lock-up and minor improvements. AF is adequate but not fast. Test AF thoroughly with multiple lenses. Check film insert operation. The FA 645 lenses are excellent. Best value AF medium format system available.
Pricing
Typical Range£350 - £600
Excellent Condition~£750
645NII slightly more valuable; with 75mm lens adds £100-150
Prices as of 2026-01. UK market, may vary.
Last verified: Jan 2026Report an error