Conclusion: Given that the Pentax 645D is out of the realm of cameras we normally test, we went back and forth on whether to do a full image analysis, but we've decided to go forward. We wanted to flesh out what we posted late last year with a little more experiential writeup and final thoughts before sending the 40-megapixel 645D back to Pentax. It's really an amazing camera, with plenty of pixels to spare, and very high-quality optics.
Pros: Exquisite detail in JPEGs, even more from RAW files, Superb per-pixel sharpness (but see Con regarding aliasing artifacts), Surprisingly good ergonomics, Very good high ISO performance, though limited to only ISO 1,600, Good dynamic range from RAW files, Accurate default saturation, Useful D-Range options, In-camera HDR support, Optional CA and Distortion correction, Fast autofocus, Supports two RAW formats, including industry standard DNG, Big, bright viewfinder with...
Cons: Exquisite detail in JPEGs, even more from RAW files, Superb per-pixel sharpness (but see Con regarding aliasing artifacts), Surprisingly good ergonomics, Very good high ISO performance, though limited to only ISO 1,600, Good dynamic range from RAW files, Accurate default saturation, Useful D-Range options, In-camera HDR support, Optional CA and Distortion correction, Fast autofocus, Supports two RAW formats, including industry standard DNG, Big, bright viewfinder with...
Summary: We could define the Pentax 645D (almost) perfect here and close this section. In fact, the quality in the image that can produce leaves open mouth for precision and sharpness. The colors are realistic, but they can also be adjusted as a favorite to have exactly the picture you are looking for. But what surprises most (at the bottom of 40 megapixel photographers good is almost obvious) is its high maneuverability.
Summary: The 645D will no doubt attract a niche audience, though its almost-£10k price tag is firmly out of reach for the majority. The experience of using a medium format digital camera is very different from a DSLR and has many advantages, especially for landscape photographers. To be clear: the 645D is less of a studio camera than its competition, but its weather-sealed single body design firmly fixes it as one to use in the field or where large, resolute files are a must.
Summary: The 645D will no doubt attract a niche audience, as the almost £10,000 price tag is firmly out of reach of most amateur users. Interestingly, though, many of the features seem to be catering for a more consumer-level user, with its DSLR-styled additions and a host of auto modes. It’s not perfect, but it does have benefits and is bound to prove popular with landscape and wedding photographers alike.
Summary: Each of these two cameras are excellent at what they do best. For example, the 1Ds Mark III is a more flexible tool, capable of holding its own when high levels of detail are needed, but without sacrificing aspects for handling such as the compact 35mm form factor, impressive autofocus and high speed continuous shooting.
Pros: Superb sharpness and resolution, Excellent dynamic range, Good handling, Weather Sealing, Good white balance performance, Lowest price medium format digital currently available, Compatible with Pentax 645 lenses, Excellent build quality, Superb autofocus, High speed continuous shooting, Decent sharpness and resolution, Vibrant contrasty images, Good colours straight from the camera, 1/250sec flash sync speed
Cons: Meter often underexposes, Slow continuous autofocus, 1/125 flash sync speed, Softening at higher ISOs, Poor white balance performance, Viewfinder a little difficult to use when wearing glasses
Conclusion: Камера, да и вся система, получилась как минимум необычная. От большинства современных среднеформатных систем Pentax 645D отличается прежде всего несъемным задником. Модульность сведена к минимум. Все как в классических зеркалках — камера отдельно, объектив отдельно. Пентапризменный видоискатель также несъемный. Шахтного видоискателя не предусмотрено. В таком решении есть минусы: нет гибкости в подборе наиболее подходящего цифрового задника.
Pros: высокое разрешение матрицы;, точная цветопередача;, сравнительно низкий уровень шума даже на высоких ISO;, удобное управление;, влагозащищенный корпус;, поддержка работы с двумя картами памяти;, совместимость со старой оптикой;, емкий аккумулятор.
Cons: немодульная конструкция;, нет возможности управления с помощью компьютера;, точки фокусировки сосредоточены в самом центре видоискателя;, работа с медленными картами формата SD.