วันเสาร์ที่ 9 กรกฎาคม พ.ศ. 2554





Nikon P300 Review
May 2011 Kelcey Smith and Barnaby Britton

Review based on a production Nikon P300, firmware v1.0

After years of relative stagnation, Nikon's P-series is back. The Coolpix P7000, released late last year, now has a little brother - the P300. Both in terms of specification and styling, the P7000 was designed to rival Canon's Powershot G-series, but the P300 is pitched a little lower.

Although at first glance it looks a lot like the Canon Powershot S95 and Olympus XZ-1, the P300 is a significantly different camera in a couple of important ways. It offers higher resolution, at 12MP rather than the 10MP common in that class. It also offers Full HD video (1080p as opposed to 720p), but its true colors are betrayed by a lower price-point, a smaller sensor (1/2.3" as opposed to 1/1.6" or 1/1.7"), and the inability to record RAW files.

And so, despite obviously being designed to appeal to the same audience as the Panasonic LX5 and Canon S95, the Coolpix P300 is actually a lot closer in specification terms to a camera like the Canon SD 4000 IS/IXUS 300 HS. Like the SD 4000 IS, the P300 offers excellent build quality and manual control in a genuinely compact body, for less cash than the larger sensor, RAW-enabled Powershot S95, or its 'big brother' the Coolpix P7000. The P300's lens is optically stabilized, covers a useful 24-100mm (equivalent) range, and is impressively fast at wideangle, if unspectacular at the long end (f/1.8-4.9). The rear 3in LCD screen is bright and contrasty with 921k dots - the same specifications as the screens in Nikon's mid-range and top-end DSLRs.

Key features
•12 megapixel BSI (back side illuminated) CMOS sensor (1/2.3in)
•ISO 160-3200 at full 12MP resolution
•1080p High Definition video mode
•24-100mm (equivalent) f/1.8-4.9 lens with optical stabilization
•PASM modes
•Twin control dials - one top, one rear
•Built-in stereo microphone
The 'big' new feature introduced in the Coolpix P300 is 1080p, 'Full HD' video. Full HD is still relatively rare in compact cameras, and it is something that none of the P300's 'high-end' peers currently offer. In most other respects, the P300's specification sheet is comparable to our expectations of the latest compact cameras. At the equivalent of 24mm, its lens is wider than either the Canon S95's or Olympus XZ-1's 28mm equivalent, but is slightly shorter than both at the tele end. It is worth noting that although it boasts a very fast maximum aperture of f/1.8, this gets a lot smaller as the lens is zoomed in. In fact, f/1.8 is only available with the lens set to its very widest focal length.


Beside two of its most obvious competitors (in control terms) the similarities between the P300 and Canon S95 are obvious. The two cameras are almost exactly the same size, and offer similar control layouts. The Olympus XZ-1 is slightly larger in all dimensions, mainly as a result of the larger lens required to offer its wider-aperture and larger imaging circle to light its larger sensor.

From behind, the main difference between the P300 and S95 is the direct movie shooting button of the former. As you can see from looking at all three cameras in this view, the rear control layout has become almost 'standard'.

A fast lens usually means greater control over depth of field, but here too, all is not what it seems. Because, all other things being equal, a smaller sensor means less control over depth of field, the P300 doesn't match up to its high-end competitors despite seeming to offer a similar maximum aperture range. Also, for good depth of field control the lens really needs to be fast at the telephoto end, and the P300's isn't. So don't expect to be able to get the same sort of blurred backgrounds with the P300 as you can with the Olympus XZ-1, for example.


If you're new to digital photography you may wish to read the Digital Photography Glossary before diving into this article (it may help you understand some of the terms used).

วันอาทิตย์ที่ 26 สิงหาคม พ.ศ. 2550

Canon EOS 40D Digital Camera






Canon EOS 40D brings new EOS platform toadvanced amateur market


Amstelveen, The Netherlands, 20 August, 2007: Canon today introduces its latest digital SLR for advanced amateurs and semi-professionals: the EOS 40D. With a 10.1 Megapixel CMOS sensor, 6.5 frames per second burst performance, a newly developed AF system and 3.0” LCD with Live View mode, the EOS 40D makes significant advances in both performance and versatility.
The camera benefits from the new EOS technology platform introduced earlier this year with the professional EOS‑1D Mark III. Canon’s DIGIC III processor delivers responsive operation, improved colour rendering and near-instant start-up time. The EOS Integrated Cleaning System combats sensor dust, while a strong magnesium alloy body with weather resistance ensures lasting durability.
“The EOS 40D represents an important step in the development of EOS for the advanced amateur market. It incorporates many of the technologies pioneered in our latest EOS-1 series cameras,” said Mogens Jensen, Head of Canon Consumer Imaging, Europe. “For digital photographers, the benefits of upgrading to the EOS 40D are real and significant. For analogue SLR users, there’s never been a more compelling reason to make the switch.”


  • Key features

    10.1 Megapixel APS-C CMOS sensor
    6.5 fps continuous shooting, max. burst 75 JPEGs
    New AF system with 9 cross-type sensors
    DIGIC III processor
    3.0” LCD with Live View mode
    EOS Integrated Cleaning System
    Clear and bright viewfinder
    Customisable Picture Style processing parameters


Speed and image quality


Canon’s third generation CMOS sensor improves on its predecessor with redesigned pixels that keep noise to a minimum. The EOS 40D maintains high image quality up to ISO 1600, expandable to H:3200 for situations where flash use is not permitted or desired. Highlight Tone Priority mode gives wedding and landscape photographers the option to boost dynamic range for highlights when shooting above ISO 200 – reproducing more tonal detail from wedding dresses, clouds and other light coloured objects.
The DIGIC III processor powers a burst rate of 6.5 fps, working with the image buffer to handle up to 75 Large JPEGs (17 in RAW) without pause. Images are processed at 14-bits for a greatly expanded colour depth, providing smoother gradations and exceptionally accurate colour reproduction.
New cross-type AF system
A key advancement of the EOS 40D is its new 9-point cross-type AF system. All nine AF points can achieve focus on both horizontal and vertical planes. A central AF point is capable of accurate focusing up to aperture f/2.8, with eight outer points working up to f/5.6. In response to requests, the dedicated AF Start (AF-ON) button allows photographers to execute auto focus with their thumb.
LCD with Live View mode
The Live View mode simplifies shooting from awkward angles such as ground-level macro or mounted tripod shots. The 3.0” LCD displays a real-time image in Live View mode, including a selectable grid overlay and a live histogram that simulates image exposure. The AF-ON button can be configured to flip the camera mirror momentarily and engage auto focusing. For the studio environment, remote Live View lets the photographer compose, adjust settings and capture the shot from a PC using the supplied EOS utility software.




Total control
The EOS 40D is fully customisable to the photographer’s shooting preferences. The mode dial contains space for three sets of user-defined settings, allowing the photographer to switch instantly between several shooting setups. A new My Menu tab provides quick access to frequently used settings, while 24 custom functions allow photographers to fine-tune camera operation and controls. The ability to change the focusing screen – with two additional screens available – adds further versatility.
For easier operation of system accessories, settings for the Speedlite 580EX II and new Wireless File Transmitter WFT-E3 can be controlled directly from the LCD.
Wireless File Transmitter WFT-E3
Also launched today is the Wireless File Transmitter WFT-E3. Built to work with the EOS 40D, the WFT-E3 enables rapid wireless image transfer to remote FTP servers, along with two-way communication through PTP and HTTP. In HTTP mode, remote users can trigger the shutter button or download images from the camera via an internet browser window. PTP mode is used for wireless remote shooting with the EOS 40D and supplied EOS Utility software.
For longer shoots, the WFT-E3 can connect directly to external hard disk drives (HDDs). And if connected to a portable GPS device, the location and time of capture is automatically added to each image as EXIF data. A convenient grip design features a main dial and shutter controls for vertical shooting, while weather resistant seals protect the unit.
Two new EF-S lenses are launched today in conjunction with the EOS 40D
EF-S 18-55mm f/3.5-5.6 IS – a high quality, affordable standard zoom lens incorporating a 4-stop Image Stabilizer
EF-S 55-250mm f/4-5.6 IS – a versatile telephoto zoom offering the longest focal range in the EF-S range to date as well as a 4-stop Image Stabilizer
Software
The EOS 40D is supplied with a comprehensive software suite to streamline the photographer’s workflow. This includes Digital Photo Professional (DPP), a powerful RAW converter that provides complete RAW image processing control.
DPP integrates with cameras features such as Dust Delete Data and Picture Styles. Users can now also create their own custom Picture Styles with the supplied Picture Style Editor software. The camera also comes with EOS Utility, ImageBrowser/ZoomBrowser and PhotoStitch.

Technologies Explained
CMOS


Canon’s CMOS technology is one of the company’s key competitive advantages, with noise reduction circuitry at each pixel site delivering virtually noise-free images. In comparison with CCD technology, the lower power consumption characteristics of Canon’s CMOS sensors also contribute to longer battery life.Signal conversion in Canon’s CMOS sensors is handled by individual amplifiers at each pixel site. Unnecessary charge transfer operations are avoided, vastly speeding up the process of getting signals to the image processor. Noise generation is reduced, power consumption is limited and faster frame rate potential is increased.


EOS Integrated Cleaning System


The EOS Integrated Cleaning System combats sensor dust in three important ways: Reduce, Repel and Remove.
1.Reduce – Internal camera mechanisms are designed to minimise dust generation. The redesigned body cap prevents dust generation through wear on the cap itself.
2.Repel – Anti-static technologies are applied to the low-pass filter covering the front of the sensor so as not to attract dust.
3.Remove – A Self- approximately one second after each start up. For instant shooting after power up, this feature is disabled immediately the shutter release is depressed.
Canon has also developed an internal Dust Delete Data system, which can map the position of visible dust on the sensor. This can then be deleted automatically after the shoot with the latest Digital Photo Professional software.
Picture Style
Picture Style pre-sets simplify in-camera control over image qualities. Picture Style pre-sets can be likened to different film types – each one offering a different colour response. Within each selectable pre-set, photographers have control over sharpness, contrast, colour tone and saturation. The camera’s factory default configuration is set to deliver immediately-usable JPEG images without need for additional menu settings. Picture Style pre-sets applied to a RAW image can be revised with Canon’s Digital Photo Professional software.


The six presets include:

Standard – for crisp, vivid images that don’t require post-processing
Portrait – optimises colour tone and saturation and weakens sharpening to achieve attractive skin tones
Landscape – for punchier greens and blues with stronger sharpening to give a crisp edge to mountain, tree and building outlines
Neutral – ideal for post-processing
Faithful – adjusts colour to match the subject colour when shot under a colour temperature of 5200K
Monochrome – for black and white shooting with a range of filter effects (yellow, orange, red and green) and toning effects (sepia, blue, purple and green)


The User Defined Picture Style can be used to store up to three customized pre-sets, or any of the pre-sets available for download from Canon’s web site at www.canon.co.jp/Imaging/picturestyle/file/. Additionally, users can create their own custom Picture Style pre-sets using the supplied Picture Style Editor software.
Software
Digital Photo Professional Software
Digital Photo Professional software provides high speed, high quality processing of lossless RAW images. Processing with Digital Photo Professional allows real-time display and the immediate application of image adjustments, giving control over RAW image variables such as white balance, dynamic range, exposure compensation and colour tone. Images can be recorded in camera with sRGB or Adobe RGB colour space. Digital Photo Professional supports sRGB, Adobe RGB, ColorMatch RGB, Apple RGB and Wide Gamut RGB colour spaces.
ICC (International Colour Consortium) profiles can be attached to TIFF or JPEG images when converted from RAW. This allows faithful reproduction of colours in software applications that support ICC profiles, such as Adobe Photoshop. For improved efficiency, a set of image adjustments can be saved as a combination and applied.
Improvements in the latest version of Digital Photo Professional include three times faster image previews, an enhanced Noise Reduction tool and simultaneous batch processing of TIFF and JPEG images.
EOS Utility
The latest version of EOS Utility provides essential support for remote shooting control, camera configuration, remote Live View support and configuration of the new Original Data Security Kit OSK-E3 and Wireless File Transmitter WFT-E3 accessories. EOS Utility can be configured to monitor ‘hot’ folders, automatically renaming and moving incoming images to a structured file system – ideal for Wi-Fi transfers, or for commercial and studio photographers who want to shoot direct to a computer.