Rabu, 11 Februari 2015

Nikon D810A Kamera Astrografi Pertama Nikon

Nikon telah meluncurkan kamera baru dioptimalkan untuk astrophotography dan aplikasi ilmiah lainnya, bernama D810A. Nikon telah menciptakan kamera yang memberikan fotografer kemampuan untuk menangkap langit malam dan nebula dengan memodifikasi cut filter inframerah untuk panjang gelombang hidrogen alpha.

 

Inframerah (IR) cut filter telah dioptimalkan untuk memungkinkan transmisi hidrogen alfa spektral line, sehingga sensitivitas empat kali lebih besar dari panjang gelombang 656nm. Kamera ini juga dilengkapi Panjang Exposure mode Manual baru untuk mengatur kecepatan rana dari 4, 5, 8, 10, 15, 20, 30, 60, 120, 180, 240, 300, 600 atau 900 detik (15 menit), serta Bulb dan pengaturan waktu. D810A menawarkan 36,3-MP CMOS sensor dan EXPEED 4 prosesor, modus Elektronik depan Curtain Shutter, dan rentang ISO dari 200 sampai 12.800 (Hi-2 51200).

Hal ini khusus dirancang untuk menahan kesulitan lama-lama, volume tinggi luar shooting. Rana telah diuji untuk 200.000 siklus, dan tubuh magnesium alloy yang kokoh telah teruji cuaca dan penyegelan debu. Tersedia pada akhir Mei, Nikon D810A dengan harga US $ 3,799.95. Kunjungi Nikon untuk informasi lebih lanjut.


Spesifikasi lengkap Nikon D810a


Body type
Body type Mid-size SLR
Body material Magnesium alloy
Sensor
Max resolution 7360 x 4912
Other resolutions FX: 5520 x 3680, 3680 x 2456; 1.2: 6144 x 4080, 4608 x 3056, 3072 x 2040; 5:4: 6144 x 4912, 4608 x 3680, 3072 x 2456; DX: 4800 x 3200, 3600 x 2400, 2400 x 1600
Image ratio w:h 04:03,3
Effective pixels 36 megapixels
Sensor photo detectors 37 megapixels
Sensor size Full frame (35.9 x 24 mm)
Sensor size notes RAW (NEF) available at 12 or 14-bits, lossless compressed, compressed, uncompressed, large or small size.
Sensor type CMOS
Processor EXPEED 4
Color space sRGB, AdobeRGB
Color filter array Primary color filter
Image
ISO Auto, 200-12800 (expandable to 100-51200)
White balance presets 12
Custom white balance Yes (6 slots)
Image stabilization No
Uncompressed format RAW + TIFF
JPEG quality levels Fine, normal, basic
File format JPEG (Exif 2.3, DCF 2.0)
RAW (NEF)
TIFF (RGB)
Optics & Focus
Autofocus Contrast Detect (sensor), Phase Detect, Multi-area, Center, Selective single-point, Tracking, Single, Continuous, Face Detection, Live View
Autofocus assist lamp Yes
Manual focus Yes
Number of focus points 51
Lens mount Nikon F
Focal length multiplier
Screen / viewfinder
Articulated LCD Fixed
Screen size 3.2″
Screen dots 1,229,000
Touch screen No
Screen type TFT-LCD (RGBW)
Live view Yes
Viewfinder type Optical (tunnel)
Viewfinder coverage 100%
Viewfinder magnification 0.7×
Photography features
Minimum shutter speed 30 sec
Maximum shutter speed 1/8000 sec
Exposure modes Program, Shutter priority, Aperture priority, Manual, Long exposure
Built-in flash Yes
Flash range 12.00 m (at ISO 100)
External flash Yes (via hot shoe, flash sync terminal, wireless)
Flash modes Front-curtain sync, slow sync, rear-curtain sync, redeye reduction, redeye reduction w/slow sync, slow rear-curtain sync
Flash X sync speed 1/250 sec
Drive modes Single-frame, Continuous low-speed [CL], Continuous high-speed [CH], Quiet Shutter Release, Quiet Continuous Release, Self-timer, Mirror-up
Continuous drive 5.0 fps
Self-timer Yes (2, 5, 10, 20 secs for up to 9 shots)
Metering modes Multi
Center-weighted
Highlight-weighted
Spot
Exposure compensation ±5 (at 1/3 EV, 1/2 EV, 1 EV steps)
AE Bracketing ±5 (2, 3, 5, 7 frames at 1/3 EV, 2/3 EV, 1 EV steps)
WB Bracketing Yes (2-9 exposures in 1-3 increments)
Videography features
Resolutions 1920 x 1080 (60p, 50p, 30p, 25p, 24p), 1280 x 720 (60p, 50p)
Format MPEG-4, H.264
Videography notes Uncompressed output over HDMI with simultaneous writing to memory card
Microphone Stereo
Speaker Mono
Storage
Storage types SD/SDHC/SDXC, CompactFlash (UDMA compliant)
Connectivity
USB USB 3.0 (5 GBit/sec)
HDMI Yes (mini-HDMI)
Microphone port Yes
Headphone port Yes
Wireless Optional
Wireless notes via WT-5A or Eye-Fi
Remote control Yes
Physical
Environmentally sealed Yes
Battery Battery Pack
Battery description EN-EL15 lithium-ion battery & charger
Battery Life (CIPA) 1200
Weight (inc. batteries) 880 g (1.94 lb / 31.04 oz)
Dimensions 146 x 123 x 82 mm (5.75 x 4.84 x 3.23″)
Other features
Timelapse recording Yes
GPS Optional
GPS notes via GP-1 or GP-1A





Source : exposure magz

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