High-precision, 11-point autofocus system
features a new SAFOX IX+ focus sensor

The 645D incorporates an advanced SAFOX IX+ focus sensor featuring more advanced optics and a new light-source detection function. Its sophisticated autofocus system has 11 sensor points (with nine cross-type sensors positioned in the middle) to assure extra-accurate focusing on the subject. The number of sensor points can be changed to three or five, while the AF frame mode can be selected from auto, select and center.

Intelligent metering system
offers a choice of 77-segment multi-pattern,
center-weighted and spot metering modes

The 645D’s advanced metering system offers three different metering modes to accommodate varying lighting conditions and individual preferences. The multi-pattern metering mode divides the image field into 77 segments to assure high-precision auto-exposure operation by minimizing the adverse effects of strong light sources and excessive reflectance.

Flexible multi-mode exposure system
features nine different shooting modes

The 645D inherits the PENTAX-invented Hyper Program and Hyper Manual modes, which are extremely popular among experienced photographers. To assure flexible, creative photo shooting, it also provides nine different shooting modes to work with. In addition, you can even select a program line from six options prior to your shooting session.

Digital level functions as a visual guideline
for accurate alignment of the horizon and skyline

The 645D comes equipped with a digital level, which detects and displays the vertical and horizontal inclination of the camera. This function comes in handy when faced with landscapes with no definite base line and nightscapes with an obscured base line. You can also switch the exposure bar-graph in the viewfinder to function as a digital level indicator, so that you can check the inclinations of both the camera and the image at a glance, without taking your eye away from the viewfinder eyepiece.

Low-shock, low-noise mirror mechanism
guarantees smooth, quiet operation unmatched
by other medium-format cameras

The 645D’s mirror works extremely quietly, because its swing-up motion is regulated by a braking mechanism, while its swing-down motion is controlled by a motor. As a result, camera shake during mirror swing-up and viewfinder image shake during swing-down are effectively minimized. Coupled with the low-noise charge mechanism in the new shutter unit, the 645D assures quiet, disturbance-free shooting at all times.

Auto sensitivity control from ISO 200 to ISO 1000
expands the creative possibilities
of medium-format photography

IThe 645D offers both automatic and manual sensitivity control, allowing you to select the desired ISO sensitivity from ISO 200 to ISO 1000 (or ISO 100 to ISO 1600 in combination with the sensitivity expansion function). In the Auto mode, you can avoid accidentally shooting images at unintentional sensitivities by limiting the range of auto sensitivity control in advance. You can even choose whether to raise the sensitivity positively or passively. All these options are provided to better accommodate many different subjects and particular shooting styles.

Other photo-shooting features

• · Auto bracketing function:

  The number of exposures to be taken can be selected from two, three or five images. Images can be taken continuously, or with a single shutter release using the one-push bracketing mode.

• · Expanded bracketing function:

  A single shutter release captures and records three images of the same subject taken at different levels of a specific parameter.

• · ±5EV exposure compensation function

• · HDR (High Dynamic Range) function:

  After three images are continuously captured at different exposure levels, the camera automatically detects their properly exposed areas and composes a single JPEG-format image.

• · High-speed shutter, with a top speed of 1/4000 second and an X-synch speed of 1/125 second:

  The 645D incorporates a newly designed shutter unit.

• · Continuous shooting at approx. 1.1 images (40 megapixels each) per second

• · Mirror lock-up mechanism

• · Multi-exposure function (up to nine images)

• · Optical and digital preview functions

• · 35 custom functions

• · Compatibility with P-TTL dedicated auto flash units