- Sony Alpha 900
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Sony α 900 
Type Single-lens reflex Sensor 35.8 mm × 23.9 mm Exmor CMOS sensor Maximum resolution 24.6 megapixels Lens Sony mount; compatible with Minolta A-type bayonet mount. Shutter Electronically controlled, vertical-traverse, focal-plane type Shutter speed range 1/8000 sec. – 30 sec., bulb Exposure metering TTL metering Cell: 40-segment honeycomb-pattern SPC Range: 0 EV to 20 EV (+2 EV to +20 EV with Spot metering)
(at ISO 100 equivalent with F1.4 lens)Exposure modes Mode: Auto, Program Auto (P, with program shift), Aperture priority (A), Shutter priority (S), Manual (M) Viewfinder Fixed eye-level system with optical glass type pentaprism, approximately 100%, 0.74x Magnification ASA/ISO range ISO 100–6400 Rear LCD monitor 3.0", 921,600 dots Storage Memory Stick: Memory Stick Duo, Memory Stick PRO Duo, Memory Stick PRO-HG Duo
Compact Flash Type I, Type II (Microdrive), UDMA (Mode5) compliantBattery NP-FM500H Lithium-Ion rechargeable battery (1650 mAh) Weight 850 g (30 oz) Optional battery packs Vertical Grip VG-C90AM Made in Japan The α900 (DSLR-A900) is Sony's current flagship digital SLR. An early design study of the camera was shown at PMA on 8 March 2007, and a newer prototype announced at PMA 2008 on 31 January 2008. Sony officially introduced the final camera on 9 September 2008 prior to photokina 2008. In October 2011, Sony Japan announced the camera's end of production.
The specifications include: 24.6-megapixel CMOS sensor, 5 frame/s burst mode, dual BIONZ processors, 100% viewfinder, 9-point AF with 10 assist points, inbuilt image sensor shift stabilization and intelligent preview.
Contents
Intelligent Preview Mode
This mode, first introduced on the DSLR-A900, allows the photographer to take a sample image at the current settings. When this mode is enabled in the settings (default), then using the depth of field (DOF) preview button makes a preview image of the subject. The display shows the image and its image histogram, but it is not stored on the memory card. At that point, the photographer can accept current settings or simulate how the image (and histogram) would look with changes in aperture, shutter speed, Dynamic Range optimizer and white balance. If the photographer prefers those new settings he simply continues to work to accept them. Otherwise he can reject them by depressing the garbage can icon. He can also compare the sample to the simulation by depressing the DISP button.
Predecessor to the DSLR-A850
The DSLR-A900 requires a labour intensive alignment procedure in the factory in order to provide a 100% scene view in the viewfinder. In eliminating this costly procedure by masking the view to a slightly smaller area (98%) while also downspecifying the frame rate to 3 frames per second, the DSLR-A850 offers a camera with most of the benefits of the DSLR-A900 at a significant savings to the photographer.
External links
Media related to Sony DSLR-A900 at Wikimedia CommonsReviews
- Sony A900 Preview Production model reviewed by Alphamountworld
- [1] by Imaging Resource.com
- Review by Digital Photography Review
- Review by South China Morning Post
- Full-length review by DigitalCameraInfo.com
News
- Sony A900 and Zeiss Lens Updates
- Sony Develops 35 mm full size CMOS Image Sensor with 24.81 Effective Megapixels
- Sony A900 ad reveals 24.6MP sensor
Konica Minolta/Sony α Digital SLR timeline Sensor 2004 2005 2006 2007 2008 2009 2010 2011 2012 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 Flagship Full frame α900 High-end α850 APS-C DG-7D α700 α77 Midrange α65 α55 DG-5D α100 α550 α580 α500 α560 α450 Entry-level α33 α35 α350 α380 α390 α300 α330 α200 α230 α290 Early models Still Video Back SB-90 for Minolta 9000 / Still Video Back SB-70 for Minolta 7000 (1986)
Minolta MS-C1100 (1992) · Minolta RD-175 (1995)Single-lens translucent (SLT) camera — HD video capable (Video AF)
Full-frame DSLR cameras Pentax MZ-D (Prototype, 2000)Contax N Digital (2002)Kodak Canon FlagshipHigh-end5D (2005) · 5D Mark II (2008)Nikon FlagshipHigh-endD700 (2008)Sony Flagshipα 900 (2008)High-endα 850 (2009)Categories:- Sony Alpha DSLR cameras
- Photography stubs
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