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avantiindietro Pentax 645N: specifications

Specs of the Pentax 645N

Type: 6x4.5-format autofocus single-lens-reflex camera with multi-mode TTL auto-exposure control.
Film: 1) 120 roll film (16 exposures)
2) 220 roll film (33 exposures)
3) 70mm film (approx. 95 exposures). Film loaded onto interchangeable film holder.
Image Size: 56mm x 41.5mm.
Lens Mount: Pentax 645 AF mount (interchangeable with Pentax 645 A mount). Applicable lenses:
1) SMC Pentax 645-FA lenses;
2) SMC Pentax 645-A lenses (usable in manual-focus mode only).
Exposure Control: TTL open-aperture multi-pattern metering.
Metering Mode: 1) Dual six-segment metering;
2) Center-weighted metering;
3) Spot metering.
Metering Range: EV2 ~ EV21 (at ISO 100 with 75mm f/2.8 lens). Electronic timer with holding time of 10 sec.
Exposure Mode: 1) Programmed AE;
2) Shutter-Priority AE;
3) Aperture-Priority AE;
4) Metered Manual;
5) Bulb.
Exposure Compensation: ±3EV (1/3 EV steps).
Memory Lock: Activated with ML button. Exposure value memorized for approx. 10 sec.
Shutter: Electronically controlled vertical-run cloth focal-plane shutter.
Speed: 1) Auto: 1/1000 sec. - 30 sec. stepless;
2) Manual: 1/1000 sec. - 4 sec.;
3) X-sync: 1/60 sec.;
4) Bulb;
5) Leaf-shutter lens: 1/8 sec. Shutter locked with main switch off.
Viewfinder: Keplerian telescope viewfinder with interchangeable Natural-Bright-Matte focusing screen (AF Center Spot Matte screen as standard).
Field of View: 92% vertical, 93% horizontal.
Magnification: 0.76X (with 75mm lens at infinity with -1 diopter).
Diopter Adjustment Range: -3.5 ~ +1.0 diopters.
Viewfinder LCD Indication: 1) Focus indicator;
2) Shutter speed;
3) Aperture;
4) Flash status;
5) Bar graph;
6) Memory lock;
7) Exposure compensation factor;
8) Out-of-exposure coupling range warning;
9) Over- and underexposure indication in Metered Manual.
External LCD Indication: 1) ISO film speed;
2) Exposure count;
3) Film transport status;
4) Battery level;
5) Photographic data imprinting.
Film Handling: Automatic film advance with built-in motor.
Loading: Automatic 1st frame positioning via shutter release button.
Advance Mode: 1) Single-frame advance;
2) Consecutive advance (approx. 2 frames/sec.). Automatic advance to film end after last frame (mid-roll advance to film end possible via mid-roll advance button).
Autofocus: TTL phase-matching autofocus system with focus lock and
predictive autofocus.
Effective Illumination Range: EV-1 ~ EV18 (at ISO 100).
AF Frame: 1) 3-point AF;
2) Spot AF. PCV beep sound for in-focus indication (cancellation possible).
Flash Synchronization: 1) Hotshoe (X-sync contact and dedicated flash contact);
2) X-sync socket. X-sync speed: 1/60 sec. automatically set at recharge completion of dedicated flash unit (X-sync speeds slower than 1/60 sec. can be used in Shutter-Priority AE and Metered Manual).
Data Imprinting: 7-segment dot-matrix data imprinting system. Data imprinted out of image area.
Recordable Data: 1) Exposure frame number; lenses);
3) Shutter speed (Exposure time in Bulb);
4) Aperture;
5) Exposure compensation value;
6) Metering mode
7) Lens focal length (only with SMC Pentax-FA lenses; approximate value for zoom.
8) Data imprinting cancellation (blank mode) available.
Self-Timer: Electronically controlled self-timer with 12-second delay. Mid-operation cancellation possible.
Film Speed: ISO 6 ~ ISO 6400.
Power Source: 6 AA-size batteries (alkaline or lithium batteries).
Battery Life: Approximately 130 rolls of 120 roll film; approximately 100 rolls of 220 roll film (under in-house test conditions using alkaline batteries).
Multiple Exposure: Via multi-exposure switch.
Dimensions: 150(W) x 111(H) x 117(D)mm (5.9" x 4.4" x 4.6")
Weight: 1,280g (45.2 oz) without batteries.

 

Comparison between the Pentax 645, 645N, and 645N II
source: Pentaxforums

Pentax 645 Pentax 645N Pentax 645N II
Year introduced 1984 1997 2001
Mount Pentax 645 A Pentax 645 AF Pentax 645 AF
Meter range 3 - 19 EV 2 - 21 EV 2 - 21 EV
Meter pattern center-weighted m (6 segment) c s m (6 segment) c s
ISO range 6 - 6400 12-6400 12-6400
Film type 120 and 220 roll film, 70mm film 120 and 220 roll film, 70mm film 120 and 220 roll film, 70mm film
No. of exposures 120 film: 15, 220 film: 32, 70mm: 90 120 film: 16, 220 film: 33, 70mm: 95 120 film: 16, 220 film: 33, 70mm: 95
Data imprint on film No Yes Yes
Exposure modes P, Tv, Av, M, B, X P, Tv, Av, M, B, X P, Tv, Av, M, B, X
Exposure compensation +/-3 EV +/- 3 EV +/- 3.3 EV
Exposure memory lock No Yes Yes
Shutter speeds (auto) 15 - 1/1000s 30 - 1/1000s 30 - 1/1000s
Shutter speeds (manual) 15 - 1/1000s 4 - 1/1000s, B 6 - 1/1000s, B
Shutter speeds (mechanical) None None None
Half step speeds in M and Tv No No Yes
Self timer No Yes Yes
Mirror lock-up No No Yes
Auto bracketing No Yes Yes
Multiple exposures Yes Yes Yes
Winder Built-in, 1.5 fps Built-in, 2 fps Built-in, 2 fps
Built-in flash No No No
TTL flash Yes Yes Yes
P-TTL flash No No No
Sync speed 1/60s 1/60s 1/60s
Flash exposure comp No No No
Autofocus No Yes, (3 points) Yes, (3 points)
Autofocus sensitivity Not applicable -1 - 18 EV -1 - 18 EV
Viewfinder 0.75x, 92% (vert), 93% (hor) 0.76x, 92% (vert), 93% (hor) 0.76x, 92% (vert), 93% (hor)
Viewfinder type Keplerian telescope Keplerian telescope Keplerian telescope
Diopter correction -5 - +2 -3.5 - +1.5 -3.5 - +1.5
Exchangeable screen Yes Yes Yes
Depth of field preview Yes Yes Yes
Image size 41.5 x 56 mm 41.5 x 56 mm 41.5 x 56 mm
Battery 6 x AA 6 x AA 6 x AA
External battery pack No Yes Yes
Size (W x H x D) 147 x 109 x 117 mm 147 x 109 x 117 mm 147 x 109 x 117 mm
Weight 1320 g 1280 g 1280 g
Comment Accepts leaf shutter lens for flash synchronization to 1/500s.
Accessories: 120 and 220 film backs, 70mm film holder
Accepts leaf shutter lens for flash synchronization to 1/500s.
Accessories: 120 and 220 film backs, 70mm film holder. External battery pack
Accepts leaf shutter lens for flash synchronization to 1/500s.
Accessories: 120 and 220 film backs, 70mm film holder. External battery pack

 

For citation purposes
Gian Luca Agnoli, Chrysis.net PHOTOGRAPHY, URL: http://www.chrysis.net/photo.