HOYA / PENTAX ont officiellement annoncé le PENTAX 645D, le premier reflex numérique moyen format PENTAX, qui sera commercialisé (au Japon) dès le mois de mai 2010.



L'annonce officielle sur www.pentax.fr

Citation
PENTAX présente le 645D
10.03.2010

La division PENTAX Imaging System de HOYA Corporation a le plaisir d'annoncer la commercialisation de son premier appareil moyen format numérique.


Le 645D équipé d'un 55mm ne sera commercialisé qu'au Japon à partir de Mai 2010, aucune décision n'ayant encore été prise quant à sa commercialisation sur le marché européen.


PENTAX 645D

   * Capteur Kodak CCD 40 millions de pixels
   * Nouveau processeur PRIME II
   * Conversion A/N 14 bits
   * 70 joints de protection
   * Double slots SD/SDHC
   * Nouveau module AF SAFOX IX+ (11 collimateurs dont 9 croisés)
   * Cellule 77 zones


PENTAX D-FA 645 55mm F2.8 AL [IF] SDM AW

   * Equivalent à 43,5mm au format 35mm
   * Résistant à l'eau et à la poussière
   * Revêtement anti-reflet
   * Diaphragme circulaire
   * Optique motorisée ultrasonique (SDM)
   * Poids : 416g

Annonce officielle (EN)



Press Release:

PENTAX's First Medium-Format Digital SLR Camera:
Designed to be the Top of Medium-Format Digital SLR Cameras, Thanks to Super-High-Resolution Images


PENTAX 645D

March 2010: HOYA CORPORATION PENTAX Imaging Systems Division is pleased to announce the launch of the PENTAX 645D lens-interchangeable, medium-format digital SLR camera. Thanks to the incorporation of a large image sensor, equal in performance to professional-standard digital camera backs, this high-performance model delivers super-high-resolution images with approximately 40 effective megapixels. It also offers outstanding dependability and superb operability and maneuverability to make outdoor shooting effortless and comfortable for demanding photographers.

The PENTAX 645D has been developed to provide super-high-resolution images produced by large image sensors — something previously available only on professional models — to serious landscape and outdoor photographers. It combines exceptional image quality with excellent maneuverability and outstanding reliability to simplify professional-level outdoor shooting. Thanks to the incorporation of a large, high-performance image sensor (measuring 44mm by 33mm) and PENTAX original image-processing technology, it produces extra-sharp, super-high-resolution images with approximately 40 effective megapixels. It features remarkable durability and dependability, thanks to its lightweight but solidly built body featuring a magnesium-steel-alloy frame, reinforced glass LCD panel protectors and a reliable dustproof, weather-resistant construction. In addition, it is designed to be compatible with the majority of the existing PENTAX 645 system, so that current PENTAX 645-series camera users can take advantage of their valuable assets, including high-performance smc PENTAX 645 interchangeable lenses.

Major Features

Unprecedented image quality

   * Super-high-resolution images made possible by approximately 40 effective megapixels
     The PENTAX 645D incorporates a high-performance CCD image sensor produced by Kodak. It measures 44mm by 33mm, and is approximately 1.7 times larger than its 35mm-format counterparts. Thanks to approximately 40 effective megapixels, it assures a wide dynamic range to faithfully reproduce the prevailing ambience and the sense of depth in super-high-resolution images that are rich in gradation and truthful in texture description. In order to bring out the full potential of the lens and the image sensor and assure the highest level of image-resolving power, the CCD unit is designed with no low-pass filters.egapixels
   * High-performance, high-speed PRIME II imaging engine
     The PENTAX 645D features the acclaimed, PENTAX-original PRIME (PENTAX Real Image Engine) II as its imaging engine. Thanks to its high-speed dataprocessing capacity and new algorithm exclusively programmed for medium-format digital SLR cameras, this high-performance imaging engine produces super-highquality images rich in gradation and faithful in color reproduction, while allowing speedy data transmission of large-volume image data — even RAW-format images as large as some 50MB per file.
   * 14-bit A/D converter for faithful conversion of image data to digital signals
     The PENTAX 645D features a high-performance A/D converter, which faithfully converts the large volume of analog image data output by the large CCD image sensor to digital signals carrying an extensive amount of image data, including resolution and gradation.

Solid, maneuverable body
The PENTAX 645D's main frame is made of lightweight but strong magnesiumsteel alloy, while the chassis is made of diecast aluminum to minimize the expansion and extension caused by heat and also to optimize kinematic accuracy and thermal stability. The LCD panels — one on the camera's top panel, another on the back panel — are covered with tempered glass plates for extra protection. The PENTAX 645D's body is also designed to be a compact and highly maneuverable mediumformat camera, despite the incorporation of such dependable features as a dust-proof, weather-resistant construction with 70 special seals, outstanding cold-resistant performance to assure solid operation at a temperature as low as –10°C, and a newly designed shutter unit with a top shutter speed of 1/4000 second that can withstand as many as 50,000 shutter releases.

Dual SD/SDHC memory card slots
The PENTAX 645D has a pair of memory card slots for the recording of images on both SD and SDHC memory cards. This dual-slot design gives the photographer extra data-storage options: for instance, recorded images can be assigned to different cards according to recording format (such as RAW or JPEG), or one of the cards can be used as the backup of the other. The settings for each memory card slot can be easily made by dedicated button.

Dependable DR II mechanism to minimize dust spots
The PENTAX 645D comes equipped with the highly dependable DR (Dust Removal) II mechanism, which effectively minimizes annoying dust spots on recorded images, even when the lenses are changed in dust-prone outdoor settings. By shifting UV/IR-cut filters placed in front of the CCD image sensor at supersonic speed using a piezoelectric element, this mechanism effectively and efficiently shakes dust off the image sensor. Thanks to the user-friendly dust-alert system, the photographer can check at a quick glance for dust adhering to the image sensor prior to the actual shooting.

Newly designed, high-precision 11-point wide-frame AF sensor
The PENTAX 645D's new SAFOX IX + wide-frame autofocus system features 11 sensor points (with nine cross-type sensors positioned in the middle) to assure the extra-high-precision focusing demanded of medium-format digital SLR cameras. To develop this sophisticated AF system, the entire optical system was redesigned, at the same time with the addition of the new functionality to analyze and make use of the light sources data in the field of view.

Advanced 77-segment multi-pattern metering
The PENTAX 645D employs a state-of-the-art, 77-segment multi-pattern metering system to assure super-high-accuracy light metering. The exposure accuracy is further enhanced by collecting such additional data as image orientation (horizontal or vertical) and the distance to and magnification of the subject using the sensors installed inside the camera body, with the obtained data incorporated into exposure calculations.

Large, easy-to-see optical viewfinder
Incorporated in the PENTAX 645D's finder unit, a trapezoid-shaped glass prism not only assures an approximately 98% field of view, but also greatly contributes to the downsizing of the camera body. Coupled with a bright, easy-to-focus Natural- Bright-Matte focusing screen, the PENTAX 645D's viewfinder offers a large, clear view of the subject.

Custom Image function to create desired visual effects with ease
The PENTAX 645D's Custom Image function lets the user easily control an image's finishing touches to more precisely reflect the user's creative intentions, or to more faithfully reproduce the ambience of the scene. The user can select one of eight modes, including the new Reversal Film mode designed to create images with the colors that are typical of reversal film. In addition, all parameters — such as saturation, hue, contrast, sharpness, key, and highlight/shadow contrast — can be easily adjusted to desired levels, so that the photographer can shoot images with great ease.

Versatile, multi-mode exposure system for faithful reproduction of creative intentions

   * Hyper Program function
     The PENTAX 645D's Hyper Program function allows the user to instantly switch from Programmed AE mode to Shutter- or Aperture-Priority AE mode with a simple turn of the electric dials positioned around the grip. A single push of the green button shifts the exposure mode back to the original Programmed AE mode.
   * Hyper Manual function
     When shooting in the Metered Manual mode, the PENTAX 645's Hyper Manual mode lets the user to instantly set the proper exposure for the subject with a single push of the green button.
   * Sensitivity-Priority mode
     The unique Sensitivity-Priority (Sv) mode automatically selects the optimum combination of aperture and shutter speed for the user-selected sensitivity. The sensitivity can be shifted swiftly by electronic dial on the back panel. The variable amount of the ISO could be configured to either 1/2 or 1/3 steps per click.
   * Shutter/Aperture-Priority mode
     Taking full advantage of the unique capability of digital cameras for the automatic shifting of sensitivity at any time, the Shutter/Aperture-Priority (TAv) mode automatically selects the most appropriate sensitivity for the user-selected aperture/shutter-speed combination. It allows the user to effortlessly experiment with a greater range of photographic expressions.

Large, easy-to-view 3.0-inch LCD monitor with approximately 921,000 dots
Positioned on the camera's back panel, a large 3.0-inch color LCD monitor with approximately 921,000 dots provides a clear, bright view of onscreen images and menus. Since its wide-view design allows quick, effortless confirmation of the monitor image from approximately 170 degrees both horizontally and vertically, the photographer has little difficulty shooting images from low and high angles. The LCD monitor is also treated with exclusive AR (Anti-Reflection) coating to minimize reflections on the screen, even in the outdoor locations under bright sunshine.

Long battery life
The PENTAX 645D is powered by a large-capacity, rechargeable lithium-ion battery, which can capture approximately 800 images* when fully charged.


Other features

   * HDR (high dynamic range) function to create one composite image with an extra-wide gradation range from three images with different exposures
   * Dynamic-Range Expansion function to compensate for both whitewashed (excessively overexposed) and blacked-out (excessively underexposed) areas
   * Digital Level function for easy checking of the image's levels
   * Automatic compensation of distortion and lateral chromatic aberration (available in combination with the D FA 645- and FA 645- series lenses)
   * Versatile white-balance control system, including the CTE mode designed to emphasize the dominant color components of the captured images, which works especially well with such scene like sunset.
   * Mirror shock/operation-noise reduction function to assure smooth, quiet operation of the mirror during shooting
   * Attachment of copyright credits on recorded images
   * Compatible with the SDM (Supersonic Direct-drive Motor) autofocus mechanism, designed to assure smooth, quiet operation using the supersonic motor installed inside SDM lenses
   * HDMI terminal (for type C mini connectors) for high-resolution image data output
   * User-friendly, color-classified control buttons/switches, based on the color universal design concept
   * PENTAX Digital Camera Utility 4 software package, including a RAW-data processing application (based on the popular SILKYPIX RAW-data processing engine developed by Ichikawa Soft Laboratory) and browser application

*Under testing conditions prescribed by PENTAX, when using a rechargeable D-LI90 lithium-ion
battery with no flash.

Photos 1

Spécifications (anglais)




Source : Pentax Japan

Photos 2

Joints de protection (contre poussière et humidité)


Le capteur CCD 40 Mp Kodak (44x33 mm)


Le système de visée du reflex MF 645D


Le viseur et les 11 collimateurs AF (module SAFOX IX+)


L'affichage sur l'écran 3" 921.000 pixels VGA (menus similaires aux autres reflex de la marque)


Niveau électronique sur l'écran LCD principal

Réservé

réservé

Il y'en avait 2 en démonstration à la photokina : c'est une sacrée bête !

Je n'avais jamais touché un moyen format auparavant... Mais voilà quelques impressions en vrac :

- Le viseur est tout simplement magnifique ! A des années lumières d'un 24*36 ! Avec l'oculaire qui épouse la forme de l'œil, on aurait presque du mal à trouver la bonne distance pour viser !

- Avec un tel gabarit, on ne retrouve pas tout à fait ses marques... même au 1/125° avec le stabilisateur j'avais du flou de bouger... J'imagine que les utilisateurs de moyen format confirmé n'auraient pas eu ce problème 
J'ai aussi eu quelques difficultés à tenter des prises en mode portraits.

- les flous sont surprenant ! avec le 55mm, à f4 j'ai un flou proche de mon 50mm à f2,8 sur mon K10... A f2,8 je suis plutôt aux alentours du f1,7, voir d'un f1,4 sur le K10...

- 46*61.5 cm en impression à 300 dpi, "de base"

- environ 13 Mo pour un jpeg

- entre 60 et 70 Mo pour un RAW, la dynamique n'a pas forcément l'air exceptionnelle au premier coup d'œil, mais quand on cherche à récupérer (cramé comme bouché) on se rend compte qu'il reste pas mal de matière en réalité 

- 800 isos qui doivent être entre ceux du K20 et du Kx...


Voilà, c'est plutôt subjectif et pas bien détaillé, mais comme ce n'est pas un appareil que je pourrais m'offrir un jour, je n'ai pas poussé plus loin les essais...

Belle bete quand meme ;)

Une belle vitrine technologique et visiblement assez bien placé en prix face à la concurrence   

j'en veuxxxxxxxxxxxxxxxxxxxxxxx

Oui c'est sur que pour toi ce serait top 

tu m'étonnes il me fait tripper ce boitier, tout ce que j'ai besoin comme j'en ai besoin.

un seul bémol les zozos qui n'atteignent pas le 50  

tu penses que je pourrais lancer une souscription sur P1?

"Dans le style mes modèles Féminins on besoin du top pour illuminer l'objectif.... et patiti patata"

je vois bien Pinky se séparer d'un rein au moins, rien que pour la cause  

Oui je le vois bien en généreux donateur   

une petite video de ce petit pentax 645d
en anglais alors faut etre  meilleur que moi en lingustique pour tout comprendre

http://www.youtube.com/watch?v=7wPD1wRpels

moi j'ai pas confiance dans un gars qui porte une casquette avec LADA ecris dessus !

Lada, c'est hype 

maintenant y a Logan qu'a pris le créneau de Lada...

Sans dec, le 645D est désormais le seul Pentax avec un bouton braketing...

Le K-5 aussi, via le bouton "raw/fx" reprogrammable 

Citation de: MouLaG Ôfr le 02 Oct 10 à 17:59
Le K-5 aussi, via le bouton "raw/fx" reprogrammable 

Ah ok
Mais si tu reprogramme le bouton raw pour le braketing, alors tu n'as plus de bouton raw....
Et pour le HDR, tu utilise les deux...