Pentax 645

Pentax 645N

Pentax 645N II

Negative format

41.5mm x 56mm

41.5mm x 56mm

41.5mm x 56mm

Usable film*

>120 roll film (15 exposures)
>220 roll film (32 exposures)
>70mm roll film (90 exposures)

>120 roll film (16 exposures)
>220 roll film (33 exposures)
>70mm roll film (95 exposures)

>120 roll film (16 exposures)
>220 roll film (33 exposures)
>70mm roll film (95 exposures)

Usable film speed

ISO 6 – 6400

ISO 12 – 6400

ISO 12 – 6400

Exposure modes

>Programmed AE mode
>Shutter priority AE mode
>Aperture priority AE mode
>Metered manual
>Bulb
>TTL flash mode
>Programmed auto-flash
>Leaf-shutter lens mode

>Programmed AE mode
>Shutter priority AE mode
>Aperture priority AE mode
>Metered manual
>Bulb
>TTL flash mode

>Programmed AE mode
>Shutter priority AE mode
>Aperture priority AE mode
>Metered manual
>Bulb
>TTL flash mode

Shutter

>15 s – 1/1000
>Bulb

>30 s – 1/1000 (auto)
>4 s – 1/1000 (manual)
>Bulb

>30 s – 1/1000 (auto)
>4 s – 1/1000 (manual)
>Bulb

Auto focus

No

>3-point auto focus
>Spot focusing
>Operational range: EV -1 to 18 (at ISO 100)
>Focus lock
>Single
>Continuous (predictive)

>3-point auto focus
>Spot focusing
>Operational range: EV -1 to 18 (at ISO 100)
>Focus lock
>Single
>Continuous (predictive)

Manual focus

Yes

Yes

Yes

Compatible lenses

>Pentax 645 A mount
>Pentax 645 FA mount (no auto focus)

>Pentax 645 A mount
>Pentax 645 FA mount

>Pentax 645 A mount
>Pentax 645 FA mount

Viewfinder

>Interchangeable focusing screens
>0.75x magnification (75mm lens)
>-5 to +2 diopter adjustment

>Interchangeable focusing screens
>0.76x magnification (75mm lens)
>-3.5 to +1.5 diopter adjustment

>Interchangeable focusing screens
>0.76x magnification (75mm lens)
>-3.5 to +1.5 diopter adjustment

Depth of Field preview

Yes

Yes

Yes

Self timer

No

12s

12s, 2s with mirror lock>up

Mirror

Instant return

Instant return

Instant return with mirror lock-up

Film winding

Motorized, 1.5 fps

Motorized, 2 fps

Motorized, 2 fps

Exposure meter

>Center weighted
>Range EV 3 – 21 at ISO 100 with 75mm f/2.8 lens

>Six segment metering
>Center weighted
>Spot metering
>Range EV 2 – 21 at ISO 100 with 75mm f/2.8 lens

Exposure compensation

+/- 3 EV in 1 EV steps

+/- 3 EV in 0.3EV increments

+/- 3.3 EV in 0.3EV increments

Exposure memory lock

No

Yes

Yes

Multiple exposure

Yes

Yes

Yes

Auto bracketing

No

Yes

Yes

Flash synch

>Hot shoe couples to Pentax dedicated auto flash units
>X-synch speed 1/60 s
>Slow shutter speed synch in metered manual mode
>X-synch socket
>ISO range unknown

>Hot shoe couples to Pentax dedicated auto flash units
>X-synch speed 1/60 s
>Slow shutter speed synch in metered manual mode
>X-synch socket
>ISO range 25 – 800

>Hot shoe couples to Pentax dedicated auto flash units
>X-synch speed 1/60 s
>Slow shutter speed synch in metered manual mode
>X-synch socket
>ISO range 25 – 800

Exposure data imprinting

No

Yes, printed on film outside of picture frame

Yes, printed on film outside of picture frame

Custom functions

No

No

10

Power source

>6 AA batteries
>Remote power pack connected with cord

>6 AA batteries
>Remote power pack connected with cord

>6 AA batteries
>Remote power pack connected with cord

Dimensions (W x H x D)

>147mm x 109mm x 117mm
>5.8” x 4.3” x 4.6”

>147mm x 109mm x 117mm
>5.8” x 4.3” x 4.6”

>147mm x 109mm x 117mm
>5.8” x 4.3” x 4.6”

Weight

1320 g (46.2 oz) without batteries

1280 g (45.2 oz) without batteries

1280 g (45.2 oz) without batteries