PhaseOne645DF
The Phase One 645DF camera body is an open platform, allowing photographers to use any Mamiya-mount digital back. Take advantage of the new Schneider Kreuznach leaf shutter lenses, digital focal plane lenses from Phase One or use your Mamiya 645 AF/AFD or Hasselblad V lenses for a broader choice and easy upgrade path. Combined with some of the world’s best digital backs, the 645DF camera offers the most versatile shutter speeds in the market, ranging from 1/4000s to 30 minutes. With the new Phase One leaf shutter lenses, the 645DF camera supports an unprecedented high flash sync speed up to 1/4000 sec: however the highest shutter speed the leaf shutter is capable of 1/1600 sec. The mirror and viewfinder of the Phase One 645DF camera are almost three times larger than those of 35mm cameras, providing much greater control of focus and composition. While hosting a complete list of features and custom functions, the Phase One 645DF camera is extremely easy to use. All settings important to the exposure are easily controlled by manual dials and buttons.
Phase One and Mamiya worked together to devise a creative solution to this issue and implemented it in the DF Body: the autofocus system can be set (via custom function #19) to either “speed” or “accuracy”. Understanding the advantages of each mode is critical to easily getting consistent focus.
Speed: The autofocus system will allow the camera to fire when it’s “fairly sure” of the focus. It is recommended you use a higher f-stop (e.g. f/8-f/16) when using this mode so that slight variances of focus will be covered by the depth-of-field.
Accuracy: The autofocus system will continue to scan focus back and forth until it is “very sure” of the focus. This can result in some “hunting” especially if the subject is low-contrast. However it provides the highest degree of assurance that the image will be perfectly focused on the intended subject, even when shooting wide-F-number (i.e. 1:2.8)
The default mode is speed. Whether you should change from the default “speed” to “accuracy” depends on your shooting style. If you’re shooting tabletop, product, landscape, architecture, interiors, etc then the “accuracy” setting will improve your focus accuracy and only cost you a fraction of a second more when the camera occasionally hunts for the perfect focus position. If you’re shooting moving subjects handheld the [Speed] setting will reduce the frequency with which the focus hunts and decrease the time between pushing the shutter release (or starting the focus using rear-button focus method).
Advanced hint: in [Speed] mode you can half-tap the shutter to focus the camera, and then release and half-tap the shutter again to fine-tune the focus. The final effect is similar to using [Accuracy] mode. When making major changes to focus distance (e.g. from infinity to a close-up or vice-versa) this is often needed when in [Speed] mode as the initial focus attempt often comes up a bit shy of moving the focus all the way to the subject.
1.Rotate the main body dial to CF (for “Custom Functions”)
2.Rotate the shutter dial until you are on CF#00 (“SEL”)
3.Rotate the thumb-dial until you’ve selected to use Custom Function Set A, B, or C.*
4.Rotate the shutter dial until you are on CF#19 (“AF_2”)
5.Rotate the thumb-dial until you’ve selected to use Option 0 [Speed] or to Option 1 [Accuracy]
6.Rotate the main body dial back to your desired shooting mode
・PhaseOne 645DFはオープンプラットフォームなので、PhaseOneシステムのデジタルバック以外でも取り付けられる。撮影者の用途に合わせて最適なデジタルバックを装着する。
デジタルバックの魅力のひとつは、その圧倒的な画素数。上記PhaseOne 645DFに装着可能なデジタルバック、IQシリーズなら、4,000万画素から8,000万画素まで用意されている。
*When using the [blank] Custom Function Set (rather than A, B, or C) the camera uses all defaults and you cannot change any custom functions. This ensures that any user can pick up any DF and put it on defaults by simply changing CF#00 to [blank].>
Currently, the default setting for the AF mode is different depending on which camera body you use. The DF body defaults to setting “0” for Speed, while the DF+ body defaults to “1” for Accuracy.
The Phase One P30 digital back continues to offer exception image quality and still is used seamlessly by professionals all over the world. Using microlenses over its 31.6 megapixels sensor, the P30 has a native sensitivity range of up to ISO1600, making it a perfect digital back for studio and on location portraiture.
With a sensor size of 44.2mm x 33.1mm, the P30 has a much larger recording area than a 35mm DSLR which allows for impressive medium format bokeh and superior resolution.
≪P30+の主な機能≫
① CCDにマイクロレンズを搭載しモアレを大幅に低減
実用上、ほとんどモアレを気にすることなく使用が可能です。
② ノイズレスなクリーンな画像を実現
P30+はエクスポーズプラステクノロジー搭載。1時間迄のノイズフリーな長時間露光が可能
夜景・天体・花火などの撮影や、タングステン光などの室内撮影に威力を発揮します
③ 風景写真から人物・商品撮影まで、オールマイティなデジタルバックとして人気No.1
④ 約3100万画素・ISO100-1600・レンズ倍率:1.3X
⑤ PhaseOne P30 からの主な変更点 ... ライブビューが可能・日本語対応