Capture Stunning Images with Pentax 645D: A Professional-Quality Medium Format Camera

Discover the power of Pentax 645D, an exceptional medium format camera that delivers high-resolution images with stunning details. With its advanced features and rugged design, this camera is perfect for professional photographers who demand the best results and want to stand out from the crowd.

Written by Victor Chan | Updated: Mon May 01 2023

Pentax 645D article cover photo

Key Features

Mar 10 2010


40 megapixels


Sensor TypeMedium format

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Overview of the 645D

Photography is an art form that requires precision, creativity, and the right equipment to capture stunning images that capture the essence of the moment. If you're a professional photographer looking for a camera that can deliver the quality and performance you need, the Pentax 645D is the perfect choice. This medium-format camera is designed to provide exceptional image quality, with a resolution of 40 megapixels and a large sensor that captures incredible details and dynamic range. Whether you're shooting landscapes, portraits, or anything in between, the Pentax 645D can help you create breathtaking images that will leave a lasting impression. In this article, we'll take a closer look at the features and benefits of this fantastic camera and explore why it's a great choice for serious photographers.

Pentax 645D Pros and Cons

Now, we will look more closely at our review of the Pentax 645D camera. We will see what it can do and compare it to other cameras like it. We will tell you what's good about it and what's not so good. This way, you'll know if it's the camera for you!


High resolution
Large image sensor
Weather-sealed body
Good noise control
Accurate colors
Good dynamic range
High-quality lenses available
Great for portrait and landscape photography
Tilt/swivel LCD screen
Good battery life


No live view
Slow autofocus
Heavier than other medium format cameras
Limited video capabilities
Limited autofocus points
Limited ISO range

Build and Construction

Body and dimensions

Pentax 645D

Weather sealed
Dimensions156 x 117 x 119mm

Weather Sealing

The Pentax 645D camera is equipped with environmental seals that make it resistant to weather, preventing water and dust from entering the camera. If you enjoy outdoor photography and need a camera that can handle extreme conditions, the 645D is an excellent choice.

Design and Handling

Main design features

View FinderOptical (pentaprism)
Screen TypeFixed Type
Screen Resolution921k dots
Body typeLarge SLR

Suitable for:

PhotographyAbove Avg.
VideographyAbove Avg.
TravelAbove Avg.

LCD Screen

This camera has a fixed type 3.00" screen, with a display resolution of 921k dots. This makes the Pentax 645D not as suitable for those looking for a vlogging camera as you cannot view yourself while shooting selfies easily. Unfortunately, the camera does not have a touch screen, which may make it less user-friendly.


645D includes a optical (pentaprism) viewfinder with no electronic viewfinder of resolution with a coverage of 98% and a magnification of 0.85x. This feature enhances the camera's suitability for outdoor photography in bright conditions.

Image Quality

Pentax 645D has a 40MP sized CCD sensor. You can shoot at maximum resolution of 40 pixels. Pentax 645D has a native ISO range of 200 - 1600 which can be boosted to 100 - null. It can also save files in RAW format which gives you a wider room for post processing.

Key Features

Mar 10 2010


200 - 1600

ISO Range

SensorMedium format
Extended ISO100 - null
Max resolution7264 x 5440 pixels

DXO Sensor Scores


82 / 102

Color Depth

24.6 / 26.5

Dynamic Range

12.6 / 14.8

Low Light ISO

1262 / 4505

DXO mark sensor scores

The DXOmark rankings indicate that the Pentax 645D camera has excellent color depth performance, which refers to the number of colors the sensor can distinguish. Additionally, its dynamic range is also above average, allowing it to retain low amounts of details in both bright and dark areas of a scene. The camera's low light ISO performance is poor, which is an important factor to consider if you plan to use it in dimly lit indoor environments or at night. Overall the image quality of the 645D is above average

Crop Factor

Camera crop factor (or focal length multiplier) refers to how a camera's sensor size affects the apparent field of view of a lens. Crop factor is determined by comparing the size of a camera's sensor to that of a full-frame sensor, which is a standard reference size for camera sensors.

Size comparison

Medium FormatFull FrameAPS-C (Sony, Nikon)

Crop factor calculator

Crop factor


Full frame equivalent


This camera: Medium format



Connectivity, storage, battery

Battery Life800 shots
Battery ModelD-LI90
Wireless Connectivity


The Pentax 645D supports SD/SDHC with 2 slots for storage. Having dual SD card slots on the Pentax 645D is highly advantageous as it mitigates the risk of losing footage due to memory card malfunctions. This feature is particularly beneficial for wedding photography and other professional settings.


The Pentax 645D uses the D-LI90 model of battery pack. This is rated for 800 shots shots which is high. If you intend to take photos or record videos for an extended period, it might be a good idea to bring along additional batteries.

Photography Features


The Pentax 645D does not have a built-in flash, but it does offer a flash shoe that allows you to attach external flashes. This provides more versatility in your lighting choices.


The Pentax 645D boasts a maximum mechanical shutter speed of 1/4000s, which is ideal for shooting fast-moving subjects in bright environments, such as in sports photography. Faster shutter speeds enable you to freeze the action and capture every detail, making it easier to get the perfect shot.

With a continuous mechanical shutter speed of n/a or an electronic shutter speed of n/a, this camera is not capable of capturing the perfect moment more easily, making it not as suited for wedding, sports, and wildlife photography. Higher shutter speeds make it easier to capture fast-paced action, ensuring that you never miss the perfect shot.


The Pentax 645D includes phase detection autofocus (AF), with 11 number of focus points.

While contrast detection is generally more accurate and precise, phase detection autofocus is faster and more effective in most situations, particularly when photographing moving subjects.

Phase detection autofocus works by dividing the incoming light into pairs and then analyzing how they intersect on the camera's sensor. This method allows the camera to determine not only if a subject is in focus but also the direction and distance needed to adjust the focus to achieve perfect sharpness.

On the other hand, contrast detection autofocus works by analyzing the contrast of an image and adjusting the focus until the highest contrast is detected. While this method is very accurate, it can be slow, especially in low light conditions or when photographing moving subjects.

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What is the sensor size of the Pentax 645D?

The Pentax 645D features a CCD sensor

Is the Pentax 645D weather sealed?

Yes the 645D does have weather sealing.

When was the Pentax 645D announced?

The Pentax 645D was announced on Mar 10 2010

Does the Pentax 645D have in-body image stabilization?

No the 645D does not have in-body image stabilization that can compensate for camera shake, making it easier to shoot handheld in low light conditions.

What is the ISO range of the Pentax 645D?

The 645D has a native ISO range of 200-1600, which can be expanded to ISO 100-null for even greater sensitivity in low light conditions.

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