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PENTAX 645Z Medium Format Camera

The Pentax 645Z is a 51MP Medium Format medium format camera — with 1080p video. Used copies start from $2,610.18 on GearFocus, with buyer protection on every purchase.

PENTAX 645Z Medium Format Camera

PENTAX 645Z Medium Format Camera

Used Pentax 645Z Listings on GearFocus

Overview — Pentax 645Z

The Pentax 645Z is a 51-megapixel medium format camera built around a dedicated medium format sensor and the PRIME III image processor. It delivers a maximum still resolution of 8256x6192 pixels, with burst shooting up to 3 fps — capable of handling up to 30 JPEG or 10 RAW frames in a single burst. The autofocus system is the SAFOX II phase-detection module, featuring 27 focus points with 25 of those being cross-type, plus dedicated low-light AF sensors for challenging shooting conditions.

The ISO range runs from 100 to 204800, offering a wide sensitivity spread for varied lighting environments. Housed in a magnesium alloy body measuring 156 x 117 x 123 mm and weighing 1,550g, the 645Z carries dustproof, weather-resistant, and cold-resistant sealing rated down to -10°C — making it a credible option for outdoor work in difficult conditions. The 3.2-inch tilting TFT LCD display resolves at 1,037,000 dots, and the optical pentaprism viewfinder provides a traditional shooting experience.

Video capabilities reach 1080p at frame rates including 60i, 30p, and 24p in 8-bit color. Connectivity includes HDMI output, a microphone jack, a headphone jack, and USB. Storage is handled via SD, SDHC, and SDXC cards.

Flash sync uses a standard ISO hot shoe with Pentax P-TTL support. The lens mount is Pentax 645, and the camera runs on the D-LI90 battery with an approximate 650-shot battery life.

Key Features — Pentax 645Z

51MP Medium Format Sensor: Captures images at 8256x6192 pixels, delivering exceptional detail and large file sizes well-suited for commercial, landscape, and studio photography.

ISO 100–204800 Range: Wide native sensitivity spread allows shooting across a broad range of lighting conditions, from bright daylight to low-light environments.

PRIME III Image Processor: Dedicated medium format processor handles the high-resolution output and contributes to the camera's extended ISO performance and color rendering.

27-Point Phase-Detection AF: SAFOX II autofocus system with 25 cross-type points and dedicated low-light AF sensors for reliable focus acquisition in varied conditions.

Weather-Sealed Magnesium Body: Dustproof, weather-resistant, and cold-resistant construction rated to -10°C makes the camera usable for outdoor work in demanding environments.

3.2-Inch Tilting LCD: 1,037,000-dot tilting TFT display allows comfortable framing from low or high angles without repositioning the entire camera.

Specifications — Pentax 645Z

Pentax 645Z full specifications
SpecDetail
Use CasesStudio, Fashion
TypeMedium Format
SensorMedium Format
Resolution51MP
ProcessorPRIME III
ISO Range100 – 204800
AF SystemPhase Detection
AF Points27 (25 cross-type)
Max Photo Resolution8256x6192
Burst Rate3 fps fps
Max Video Resolution1080p
Max Frame Rate30fps

Description — Pentax 645Z

The Pentax 645Z is a medium format camera centered on a 51MP sensor paired with the PRIME III image processor, producing stills at a maximum resolution of 8256x6192 pixels. The camera's ISO sensitivity spans 100 to 204800, giving shooters considerable flexibility across lighting conditions. Autofocus is handled by the SAFOX II phase-detection system with 27 focus points — 25 of them cross-type — and includes dedicated low-light AF sensors.

Burst shooting reaches 3 fps with a buffer supporting up to 30 JPEG or 10 RAW frames. The body is built from magnesium alloy, weighs 1,550g, and measures 156 x 117 x 123 mm. Weather sealing is rated dustproof, weather-resistant, and cold-resistant down to -10°C.

On the back, a 3.2-inch tilting TFT LCD with 1,037,000 dots of resolution aids composition from varied angles, while an optical pentaprism viewfinder handles eye-level shooting. Video records up to 1080p at frame rates of 60i, 30p, and 24p in 8-bit color. Connectivity covers HDMI, USB, a headphone jack, and a microphone jack.

The flash system supports Pentax P-TTL via a standard ISO hot shoe, and the camera uses the D-LI90 battery rated for approximately 650 shots.

Pros — Pentax 645Z

  • ✓51MP medium format sensor delivers a maximum resolution of 8256x6192 pixels
  • ✓Wide ISO range from 100 to 204800 covers a broad range of lighting conditions
  • ✓27-point SAFOX II AF system with 25 cross-type points and dedicated low-light AF sensors

Cons — Pentax 645Z

  • ✗No in-body image stabilization of any type
  • ✗Video tops out at 1080p 8-bit — no higher resolution or higher bit-depth recording
  • ✗No built-in Wi-Fi or Bluetooth connectivity

Resources & Downloads — Pentax 645Z

Frequently Asked Questions — Pentax 645Z

What lenses are compatible with the Pentax 645Z?+
The Pentax 645Z uses the Pentax 645 lens mount. Any lens designed for that mount system is compatible with this camera body.
Is the Pentax 645Z weather-sealed?+
Yes. The body design specifications confirm dustproof, weather-resistant, and cold-resistant protection rated down to -10°C. The body is constructed from magnesium alloy.
What is the autofocus system like on the 645Z?+
The 645Z uses the SAFOX II phase-detection AF system with 27 focus points, 25 of which are cross-type. It also includes dedicated low-light AF sensors to assist focusing in challenging conditions.
What video resolutions and frame rates does the 645Z support?+
The 645Z records video up to 1080p with frame rate options of 60i, 30p, and 24p. Video is captured in 8-bit color with sRGB and Adobe RGB color profile options.
What storage media does the Pentax 645Z accept?+
The camera accepts SD, SDHC, and SDXC memory cards. No other storage formats are listed in the specifications.
Does the 645Z have any wireless connectivity?+
No. The specifications confirm that Wi-Fi is not present, and Bluetooth is not listed. Wired connectivity includes USB and HDMI output.

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