Friday, February 27, 2009

IEEE 1394 Interface






The IEEE 1394 interface is a serial bus interface standard for high-speed communications and isochronous real-time data transfer, frequently used by personal computers, as well as in digital audio, digital video, automotive, and aeronautics applications. The interface is also known by the brand names of FireWire (Apple Inc.), i.LINK (Sony), and Lynx (Texas Instruments). IEEE 1394 replaced parallel SCSI in many applications, because of lower implementation costs and a simplified, more adaptable cabling system. The 1394 standard also defines a backplane interface, though this is not as widely used.

IEEE 1394 has been adopted as the High Definition Audio-Video Network Alliance (HANA) standard connection interface for A/V (audio/visual) component communication and control. FireWire is also available in wireless, fiber optic, and coaxial versions using the isochronous protocols.

Since the mid 1990s, consumer grade camcorders had included a four-circuit 1394 interface, though, except for premium models, this is becoming less common. It remains the primary transfer mechanism for almost all high end professional audio and video equipment. Since 2003 many computers intended for home or professional audio/video use have built-in FireWire/i.LINK ports, especially prevalent with Sony and Apple's computers and the older iPods. The legacy (alpha) 1394 port is also available on premium retail motherboards.

Saturday, February 21, 2009

Bluetooth




Bluetooth is a wireless protocol for exchanging data over short distances from fixed and mobile devices, creating personal area networks (PANs). It was originally conceived as a wireless alternative to RS232 data cables. It can connect several devices, overcoming problems of synchronization.

Class Maximum Permitted Power
mW (dBm)
Range
(approximate)
Class 1 100 mW (20 dBm) ~100 meters
Class 2 2.5 mW (4 dBm) ~10 meters
Class 3 1 mW (0 dBm) ~1 meter


Version Data Rate
Version 1.2 1 Mbit/s
Version 2.0 + EDR 3 Mbit/s
WiMedia Alliance
(proposed)
53 - 480 Mbit/s

Saturday, February 14, 2009

Wi-Fi





Wi-Fi is a trademark of the Wi-Fi Alliance, founded in 1999 as Wireless Ethernet Compatibility Alliance (WECA), comprising more than 300 companies, whose products are certified by the Wi-Fi Alliance, based on the IEEE 802.11 standards (also called Wireless LAN (WLAN) and Wi-Fi). This certification warrants interoperability between different wireless devices.

The alliance was founded because many products did not correctly implement IEEE 802.11 and some included proprietary extensions. This led to incompatibilities between products from different manufacturers.

The Wi-Fi Alliance tests the wireless components to their own terms of reference. Products that pass become Wi-Fi certified and may carry the Wi-Fi logo. Only products of Wi-Fi Members are tested, because they pay membership and per-item fees. Absence of the Wi-Fi logo does not necessarily mean non-compliance with the standard.

In France, Poland, the United States, and some other countries, the term Wi-Fi often is used by the public as a synonym for wireless Internet (WLAN); but not every wireless Internet product has a Wi-Fi certification, which may be because of certification costs that must be paid for each certified device type.

Wi-Fi certification is provided for technology used in home networks, mobile phones, video games, and other devices that require wireless networking. It covers IEEE 802.11 standards, including 802.11a, 802.11b, 802.11g, and 802.11n.

Wi-Fi is supported by most personal computer operating systems, many game consoles, laptops, smartphones, printers, and other peripherals.

Thursday, February 5, 2009

Panasonic Lumix DMC-LX3

Canon Speedlite 430EX Canon Speedlite 430EX
Canon Speedlite 430EX Canon Speedlite 430EX
Canon Speedlite 430EX Canon Speedlite 430EX




Panasonic Lumix DMC-LX3 Specifications


Sensor • 1/1.63" sensor
• 11.3 million total pixels CCD
• 10.1 million effective pixels
• Primary Color Filter
Image stabilization • Lens-shift
• MEGA O.I.S. (Auto/Mode1/ Mode2)
Image sizes

4:3 Aspect Ratio:
• 3648x 2736 pixels
• 3072 x 2304 pixels
• 2560 x 1920 pixels
• 2048 x 1536 pixels
• 1600 x 1200 pixels
• 640 x 480 pixels

• 3:2 Aspect Ratio:
• 3776 x 2520 pixels
• 3168 x 2112 pixels
• 2656 x 1768 pixels
• 2112 x 1408pixels
• 2048 x 1360 pixels

• 16:9 Aspect Ratio:
• 3968 x 2232 pixels
• 3328 x 1872 pixels
• 2784 x 1568 pixels
• 2208 x 1248 pixels
• 1920 x 1080

Movie mode • QuickTime Motion JPEG
• 4:3 Aspect Ratio: 640 x 480 pixels 30 fps or
• 320 x 240 pixels 30 fps/10 fps
• 16:9 Aspect Ratio: 848 x 480 pixels 30 fps
• HD(16:9 Aspect Ratio): 1280x720 pixels 24fps"
Output formats • JPEG ( Exif 2.21 standard)
• RAW
Image processor Venus Engine IV
Lens • 2.5x zoom
• f=5.1-12.8mm (35mm Equiv.: 24-60mm)
• F2.0 - F2.8
• LEICA DC VARIO-SUMMICRON
• 8 elements in 6 groups
• 4 Aspherical Lenses / 4 Aspherical surfaces)
Focus modes • Normal
• Macro
• Quick AF
• Continuous AF
• Manual Focus (Joystick)
• One Shot AF
• AF Area Select
• AF Tracking
AF assist lamp Yes
Shooting modes • Intelligent AUTO
• P(Program) mode
• A(AperturePriority) mode
• S(Shutter Priority) mode
• M(Manual) mode
• Motion Picture
• Custom1
• Custom2
• Scene mode
Scene modes • Portrait
• Soft Skin
• Self-Portrait
• Scenery
• Sports
• Night Portrait
• Night Scenery
• Food, Party
• Candle Light
• Baby1
• Baby2
• Pet
• Sunset
• High sensitivity
• Starry Sky
• Fireworks
• Beach
• Snow
• Aerial photo
• Hi-Speed Burst
• Flash-Burst
• Film Grain
• Pin Hole
Metering • Intelligent Multiple
• Center Weighted
• Spot
AE Bracketing +/- 0.3/0.5 EV
Exposure compen.

• +/-2 EV
• 0.3 EV increments

Sensitivity

• Auto
• 80
• 100
• 200
• 400
• 800
• 1600
• 3200
• High Sensitivity Mode : Auto(1600 - 6400)

Shutter speed

• P: 1-1/2000sec (Selectable minimum shutter speed)
• A/S: 8-1/2000sec
• M: 60-1/2000sec
• Starry Sky Mode : 15, 30, 60sec.

Aperture values • Wide: F2.0 - F8.0 Tele: F2.8 - F8
White balance • Auto
• Daylight
• Cloudy
• Shade
• Flash
• Halogen
• Color Temperature
• White Set 1
• White Set 2
• White Balance Adjustment
Drive modes

• Single
• Continuous

Burst speed • 2.5 frames/sec Max. 8 images (Standard), Max 4 images (Fine), Max 3images (RAW)
• High-speed Burst Mode: approx. 6 frames/sec (recorded in 3M for 4:3, 2.5M for 3:2, 2M for 16:9)
Self-timer 10 sec. / 2 sec.
LCD monitor • 3.0", 3:2 Polycrystalline TFT LCD Display
• 460K dots
• Field of View : approx. 100%
• AUTO Power LCD mode
Viewfinder Optional
Flash • Auto
• Auto/Red-eye Reduction
• Forced On
• Slow Sync./Red-eye Reduction
• Forced Off
• Flash Synchro 1st / 2nd
• Flash output Adjustment (1/3EV step, -2 - +2 EV)
• Hotshoe
FLash coverage 0.8 - 8.3m (Wide/Macro/ISO Auto), 0.3 - 5.9m (Tele/ISO Auto)
Connectivity

• DC Input
• AV Output (NTSC/PAL)
• HD AV Output (Component)
• USB2.0 High speed

Storage • SD Memory Card
• SDHC Memory Card
• MultiMediaCard (Still image only)
• Internal Memory (approx. 50 MB)
Power • Li-ion Battery Pack (3.7V, 1150mAh)
• Battery life: 380 pictures (CIPA standard)
• AC Adaptor (Input: 110-240V AC) (Optional)
Dimensions 108.7 x 59.5 x 27.1 mm
Weight (with battery) Approx. 265 g