Sony Alpha DSLR-A850

Sony Alpha DSLR-A850


Hello friends Sony launch new hd image camera Sony Alpha DSLR-A850.The A850 is, next to the flagship DSLR A900, Sony's second full-frame digital camera. The two only noticeable differences in specification between the cameras is a slightly smaller viewfinder and a smaller buffer, resulting in slower continuous shooting, on the A850. With its tank-like build quality, intuitive user-interface and excellent handling the A850 is, despite (or rather because) of the lack of some 'digital' features such as live view or a movie mode, a no-nonsense photographers' camera that delivers excellent image quality at base ISO but cannot quite keep up with the competition at higher sensitivities.

Wildlife and sports photographers would almost certainly prefer better low light performance, faster continuous shooting and autofocus but for resolution-hungry applications in good light, such as landscape or studio photography, the A850 is a more than valid option. This is especially true for those photographers who operate on a tighter budget but do not want to do without the full-frame format.

Read More

Nikon D7000

 Excellent performance for its class; great viewfinder; control locations and operations streamlined over previous Nikon dSLRs; double SDXC-compatible card slotsCanon EOS 60D Nikon D90 Nikon D7000 Nikon D300s
Sensor (effective resolution) 18-megapixel CMOS 12.3-megapixel CMOS 16.2-megapixel CMOS 12.3-megapixel CMOS
22.3 x14.9mm 23.6 x 15.8mm 23.6 x 15.6mm 23.6 x 15.8mm
Color depth 14 bit 12 bit 14 bit 14 bit
Sensitivity range ISO 100 - ISO 6,400/12,800 (expanded) ISO 100 (expanded)/200 - ISO 3,200/6,400 (expanded) ISO 100 - ISO 6,400/25,600 (expanded) ISO 100 (expanded)/200 - ISO 3,200/6,400 (expanded)
Focal-length multiplier 1.6x 1.5x 1.5x 1.5x
Continuous shooting 5.3fps
 16 raw/58 JPEG 4.5fps
 n/a 6fps
 n/a raw/100 JPEG 7fps
 n/a
Viewfinder
 magnification/effective magnification 96% coverage
 0.95x/0.59x 96% coverage
 0.94x/0.63x 100% coverage
 0.94x/0.63x 100% coverage
 0.94x/0.63x
Autofocus 9-pt AF all cross-type; center cross to f2.8 11-pt AF
 1 cross-type 39-pt AF
 9 cross-type 51-pt AF
 15 cross-type
Shutter speed 1/8,000 to 30 secs; bulb; 1/250 sec x-sync 1/4,000 to 30 secs; bulb; 1/200 sec x-sync 1/8,000 to 30 secs; bulb; 1/250 sec x-sync 1/8,000 to 30 secs; bulb; 1/250 sec x-sync
Shutter durability 100,000 cycles 100,000 cycles 150,000 cycles 150,000 cycles
Metering 63-zone iFCL 420-pixel 3D Color Matrix Metering II 2,016-pixel 3D Color Matrix Metering 1,005-pixel 3D Color Matrix Metering II
Image stabilization Optical Optical Optical Optical
Video H.264 QuickTime MOV 1080/30p/25p/24p; 720/60p/50p
 Monoaural 720/24p Motion JPEG AVI
 Monaural 1080/24p/25p;
 720/30p/24p/25p H.264 QuickTime MOV
 Monoaural 720/24p Motion JPEG AVI
 Monaural
Rated estimated max HD video length 4GB
 (approx 12 minutes) 2GB
 (approx 5 minutes) 20 minutes 2GB
 (approx 5 minutes)
Manual aperture and shutter in video Yes No Yes No
Mic input Yes No Yes Yes
LCD size 3 inches articulated
 1.04 million dots 3 inches fixed
 921,000 dots 3 inches fixed
 921,000 dots 3 inches fixed
 921,000 dots
Wireless flash Yes Yes Yes Yes
Memory slots 1 x SDXC 1 x SDHC 2 x SDXC 1 x CF, 1 x SDHC
Battery life (CIPA rating) 1,100 shots 850 shots 1,050 shots 950 shots
Dimensions (inches, WHD) 5.7 x 4.1 x 3.1 5.2 x 4.1 x 3 5.2 x 4.2 x 3 5.8 x 4.5 x 2.9
Body operating weight (ounces) 27 26 27.3 34.2
Mfr. price $1,099.99 (body only) $899.95 (body only) $1,199.95 (body only) $1,699.95 (body only)
$1,399.99 (with 18-135mm lens) $1,149.95 (with 18-105mm lens, est) $1,499.95 (with 18-105mm lens) n/a
Ship date October 2010 August 2008 October 2010 August 2009

Read More

Nikon D5100

The arrival of the D5100 appears to signal the completion of Nikons refresh of its non-pro DSLR lineup. Its feature set and pricing mean that it sits very comfortably between the beginner-friendly D3100 and the high-end D7000 - it's clearly aimed to attract the attention of enthusiast photographers without cannibalizing sales of is sister models. A camera maker can judge the success of its market positioning by seeing how many people are wondering 'which model is right for me?' on discussion forums - and we think a D3100/D5100/D7000 progression would minimize such doubts. The official line is that the D90 maintains its position in the range, but both its naming and overlap with other models suggest that its role is now more one of historical interest than future significance.

The D5100 has a very similar 16.2MP CMOS sensor to the excellent one seen in the D7000 but, understandably, loses out on that camera's high-end build and feature-set. So there's no wireless flash control, magnesium alloy build or 39-point AF system but the underlying image quality is all but identical.

As has become standard for a Nikon at this price point, the D5100 offers a single control dial, pentamirror viewfinder and no built-in autofocus motor. However, it gains 1080p video capability (at 30, 25 or 24fps), saved using the efficient H.264/AVC codec, and a 920,000 dot fully articulated LCD panel to help shoot it. These are both significant gains over its predecessor the D5000, and the improvements extend to the D5100 having smaller, neater construction and a more conventional side-mounted hinge for that LCD.

These changes resolve two rather awkward aspects of Nikon's existing lineup: if the D5100 and D7000 end up being neighboring models it will avoid the inelegant overlap that existed between the D5000 and D90. It also ensures a more elegant appearance to the models themselves (the D5000 was many things, but pretty wasn't one of them).

Although the D5100 is listed as having an Expeed 2 processor, it's worth remembering that Nikon doesn't use this naming system to denote any specific components, so the actual chunks of silicon and capabilities aren't necessarily the same as those in the D3100 or D7000. However, in addition to a similarly specced 16.2MP sensor, the D5100 offers the same ISO settings as its big brother - extending up to an equivalent of ISO 25,600. It also inherits 14-bit Raw shooting - one of the factors that helps give the D7000 its impressive dynamic range - which is something Nikon used to offer only on its more expensive models.
Side by side

The D5100 is slightly smaller than the Rebel T3i/EOS 600D - probably its nearest competitor. Both are slightly larger than the Panasonic Lumix DMC-G2, which is built around a smaller sensor, and of course lacks an optical viewfinder assembly (instead using a high quality electronic finder). Ergonomically, the G2 is the most 'involved', and has the most physical control points and a touch-sensitive LCD screen, but overall the three cameras are physically quite similar.


 Nikon D5100 Key Features
16.2 megapixel DX-format CMOS sensor
Side-articulated 3.0" LCD monitor (920,000 dots)
11 AF points (with 3D tracking)
IS0 100-6400 range (Up to 25,600 equivalent when expanded)
HD movies (1080p, 720p or WVGA)
4 fps continuous shooting
In-camera effects filters in both stills and video modes

Read More