|image by ringo-en (Image rights)|
The Pentax 645Z is a medium format digital SLR announced by Ricoh Imaging in 2014. It is an update of the previous Pentax 645D.
The body is similar in design to the previous 645 cameras from the original film based 645, 645N and Digital 645D, with a solid metal internal chassis wrapped in a rubberized and plastic exterior; but it is dustproof, weather-resistant and cold-resistant.
It uses a 51 megapixel CMOS based sensor of 43.8 x 32.8mm. This sensor does not use an anti-aliasing filter. This produces images with a resolution of 8256 x 6192 pixels. The crop factor of this is 0.79x. It uses the 645AF2 mount, which that is compatible with the film based 645AF lenses. Pentax 67 lenses can be used with an adapter as well. Autofocus is with the SAFOX 11 system, which features 27 points.
The metering is based on a TTL with a range -1 to 21 EV (ISO 100 at 55mm f/2.8). Several metering modes are available, including multi-segment metering, center-weighted metering and spot metering. Exposure compensation can be adjusted ±5 EV in 1/3 or 1/2 EV steps.
The electronically vertical travelling focal plane shutter has speeds in auto of 1/4000 to 30 sec. In manual 1/4000 to 30 sec. there is also a bulb mode.
It uses an optical prism finder with an approximately 98% coverage, 0.62x (55mm f/2.8 at inf); 0.85x (75mm f/2.8 at inf) magnifications. The finder has a diopter adjustment from -3.5 to + 2.0. There is also a tiltable 3.2" colour LCD screen.
There are two media card slots for SD, SDHC, SDXC memory cards. The slots can be configured for sequential save, save to both cards, and separate cards for RAW/JPG. Interfaces include USB 3.0 (micro B) and HDMI (Type D). The battery is a rechargeable Li-Ion battery D-LI90.
|image by Akiko Aoki (Image rights)|
- Pentax 645Z user manual at Manualslib
- Hands on with the Pentax 645Z by Jeff Keller at Digital Photography Review