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نقد و بررسی
دوربین پنتاکس 645Z
مشخصات فنی :
| ابعاد | 15.5×11.7×12.2 میلیمتر |
| بازه فریم ها | 3 fps, JPEG ( L: ★★★ at Continuous H): up to 30 frames, RAW: up to 10 frames, TIFF: up to 12 frames |
| بازه نورسنجی | EV -1 to 21 (ISO 100 at 55mm f/2.8) |
| براکتینگ نور | 2, 3, or 5 frames, Available with Continuous, Self-timer, or Remote Control |
| جبران نوردهی | ±5 EV (1/3 EV steps or 1/2 EV steps) |
| جبران نوردهی فلاش | -2 to +1 EV (1/2 steps) |
| حالات فوکاس خودکار | Single AF (AF.S), Continuous AF (AF.C), Manual, Focus operation customizable |
| حالت درایو | Single Frame, Continuous (H, L), Self-timer (12 sec., 2sec.), Remote Control (immediately, 3 sec., continuous), Multi-exposure (available with Continuous, Self-timer or Remote Control), Interval Shooting, Interval Composite |
| حالت های نورسنجی | Multi-segment metering, Center-weighted metering, Spot metering |
| حذف کننده خاک | Image sensor cleaning using ultrasonic vibrations “DR II” with the Dust Alert function |
| رابط ها | Connection Ports: USB 3.0 (micro B), external power supply terminal, cable switch terminal, X-sync socket, HDMI output terminal (Type D), stereo microphone input terminal (USB Connection: MSC/PTP) |
| Video out: HD (via HDMI), NTSC, PAL | |
| رزولوشن | JPEG: L (51M: 8256 x 6192), M (36M: 6912 x 5184), S (21M: 5376 x 4032), XS (3M: 1920 x 1440) |
| RAW: L (51M: 8256 x 6192) | |
| TIFF: L (51M: 8256 x 6192) | |
| روشنایی | EV -3 to 18 (ISO 100, at normal temperature) |
| زمان ضبط ویدئو | بیش از 25 دقیقه |
| سرعت های سینک شدن فلاش | 1/125 sec |
| سرعت های شاتر | Auto: 1/4000 to 30 sec. |
| Manual: 1/4000 to 30 sec. (1/3 EV steps or 1/2 EV steps) | |
| Bulb | |
| سطح الکترونیکی | Displayed in viewfinder and LCD panel (horizontal direction only); displayed on LCD monitor (horizontal direction and vertical direction) |
| سنسور | 43.8×32.8 mm CMOS |
| سیستم فوکاس | SAFOX II TTL phase-matching autofocus with 27 AF points (25 cross type focus points in the center) |
| سیستم نورسنجی | TTL open aperture metering using 86K pixel RGB sensor |
| سیستم های ذخیره سازی | SD, SDHC*, SDXC* memory card, Eye-Fi card, FLUCARD (*UHS-I compatible) |
| Dual Card Slot: Sequential save, Save to Both Dual save, Separate RAW/JPG, Copying images between slots possible | |
| سیستم کامپیوتری مورد نیاز | Windows: Windows 8.1 (32 bit/64 bit) / Windows 8 (32 bit/64 bit) / Windows 7 (32 bit/64 bit) / Windows Vista (32 bit/64 bit), Intel Core 2 Quad or higher, 4GB or more |
| Mac: Mac OS X 10.9 /10.8 / 10.7 / 10.6, Intel Core 2 Quad or higher, 4GB or more | |
| صفحه فوکاس | Standard: Interchangeable Natural-Bright-Matte focusing screen |
| طول Eye-Relief | Approximately 21 mm (from view window) |
| Approximately 24.1 mm (from center of lens) | |
| عمق رنگ | JPEG: 8 bits/channel |
| RAW: 14 bits/channel | |
| فلاش خارجی | Hotshoe (P-TTL), high speed sync and wireless with PENTAX dedicated flash, X-Sync Socket |
| فوکاس خودکار نمایش زنده | Contrast detection AF (Face Detection, Tracking, Multiple AF Points, Select, Spot |
| Focus Peaking: On/Off | |
| قفل نور خودکار | Button type (timer-control: two times the meter operating time set in Custom Setting), Continuous as long as the shutter release button is depressed halfway |
| لنزها | PENTAX 645AF2, 645AF and 645A mount lenses PENTAX 67 medium format lenses useable with adapter |
| SDM function: Yes | |
| مانیتور LCD | 3.2″ 1037k-Dot Tiltable TFT Color LCD |
| مجموع پیکسل ها | 52.99 مگاپیکسل |
| مقاوم در برابر شرایط بد آب و هوایی | دارد – 76 special seals |
| منبع تغذیه | Rechargeable Li-Ion battery D-LI90 |
| AC adapter available: AC Adapter Kit K-AC132 (Optional) | |
| مواد ساخت | آلیاژ منیزیم و آلومینیوم |
| میدان دید نمایش زنده | 100% |
| ناحیه فوکاس | Spot, Select, Expanded Area AF (S, M, L), Zone Select, Auto (27 AF Points) |
| نمایش زنده | TTL using CMOS image sensor |
| نوع دوربین | TTL autofocus, auto-exposure medium format digital SLR camera |
| نوع شاتر | Electronically controlled, vertical-run, focal plane shutter |
| پیش نمایش دهنده عمق میدان | Optical (diaphragm stop-down), Digital |
| پیکسل های مؤثر | 51.4 مگاپیکسل |
| کیفیت تصاویر | JPEG: ★★★ (Best), ★★ (Better), ★ (Good), RAW + JPEG simultaneous recording available |
| RAW: PEF, DNG | |
| اندازه فایل‌های قابل ضبط | Full HD: (1920×1080, 60i/50i/30p/25p/24p) |
| HD: (1280×720, 60p/50p/30p/25p/24p) | |
| سیستم فایل‌ها | Stills: RAW (PEF/DNG), TIFF, JPEG (Exif 2.30), DCF2.0 compliant |
| Video: MPEG-4 AVC/H.264 (MOV) *Motion JPEG (AVI) for Interval Movie Record | |
| نوع دهانه لنز | PENTAX 645AF2 mount with AF coupler, lens information contacts, and power contacts stainless steel |
| ریموت کنترل | دارد – infrared (0 seconds, 3 seconds, continuous), cable switch |
| لرزشگیر | Lens-shift type (when using SR system lens) |
| حساسیت ISO | Auto, 100 to 204,800 (EV steps can be set to 1EV, 1/2EV, or 1/3EV) |
| مدهای نوردهی | Program, Sensitivity Priority, Shutter Priority, Aperture Priority, Shutter & Aperture Priority, Manual, Bulb, Flash X-sync Speed, USER1, USER2, USER3 |
| مدهای تراز سفیدی | Auto, Multi Auto, Daylight, Shade, Cloudy, Fluorescent Light (D: Daylight Color,N: Daylight White, W: Cool White, L: Warm White), Tungsten, Flash, CTE |
| Manual mode(s): Manual (up to 3 settings can be saved), Color Temperature (up to 3 settings can be saved), Copying the white balance settings of a captured image possible. | |
| مودهای فلاش | Flash On, Flash On+Red-eye Reduction, Slow-speed Sync, Slow-speed Sync+Red-eye, P-TTL, Trailing Curtain Sync, contrast-control-sync, high-speed sync, wireless sync (available with a dedicated external flash) |
| مکانیزم ویزور | Kepler-telescopic, trapezoid prism finder |
| بازتابش ویزور | 0.62x (55mm f/2.8 at infinity); 0.85x (75mm f/2.8 at infinity) |
| سطح پوشش ویزور | Approximately 98% |
| تنظیم بر اساس نمره چشم | -3.5 m to + 2.0 m-1 |
| تایمر | دارد – 12 seconds, 2 seconds |
| دمای قابل استفاده | 14 to 104°F / -10 to 40°C |
| وزن | 1550 گرم |
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