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Features information, tips and hints on all aspects of photography as well as photo editing technique. Your critique, comments and compliments are always welcomed to help me improve and learn.

Tuesday, September 30, 2008

Photography - Close Up Macro Lenses


Close-up filters (also known as macro filters) are a filter that screws onto the end of your cameras lens. The main purpose of the close-up filter is to decrease the minimum distance required for the lens to focus. Take the telephoto lens for example. This lens would normally require you to be at least 1.5m from the subject being photographed before the subject will properly focus, but attaching a close-up filter to the lens will let you stand much closer to the subject. Filters can be used together (stacked) or used separately but always remember that if stacking your filters, that the strongest filter (+10 or the highest number filter) is closest to the lens.
Close-up filters are measured in Dioptre. A dioptre is a measure of lens power.

Sunday, September 28, 2008

Canon 50D

Canon EOS 50D Digital SLR Camera (15.1MP, 3" LCD, ISO 12800) (Canon Malaysia)

With the same rugged, conservative body as the 40D, the Canon EOS 50D's only distinguishing mark is the silver bezel on its mode dial, and there are a few minor changes to how the buttons and controllers are used, but for the most part the 50D's body is unchanged.
The Canon EOS 50D body is a magnesium alloy, with slightly improved seal against dust and water.





Canon EOS 50D specifications

Sensor • 22.3 x 14.9 mm CMOS sensor
• RGB Color Filter Array
• Built-in fixed low-pass filter (with self-cleaning unit)
• 15.5 million total pixels
• 15.1 million effective pixels
• 3:2 aspect ratio
Image processor DIGIC 4
A/D conversion 14 bit
Image sizes • 4752 x 3168
• 3456 x 2304
• 2353 x 1568
File formats

• RAW (.CR2; 14-bit)
• JPEG (EXIF 2.21) - Fine / Normal
• RAW + JPEG (separate files)
sRAW1 (7.1 MP)
sRAW2 (3.8 MP)

Lenses • Canon EF / EF-S lens mount
• 1.6x field of view crop
Dust reduction • "EOS Integrated Cleaning System"
• Self-cleaning sensor unit (filter in front of sensor vibrates at high frequency at start-up and shutdown - can be disabled)
• Dust Delete Data - Data from a test shot is used to 'map' dust spots and can be later removed using Canon DPP Software
Auto focus • 9-point TTL CMOS sensor
• All points cross-type for lenses of F5.6 or faster
• Center point additionally sensitive with lenses of F2.8 or faster
• AF working range: -0.5 - 18 EV (at 23°C, ISO 100)
Focus modes • One shot AF
• AI Servo AF
• AI Focus AF
• Manual focus
AF point selection • Auto
• Manual
Predictive AF • Up to 8 m
AF assist • Stroboscopic flash
AF microadjust • +/- 20 steps
• Adjust all lenses by same amount/individually adjust up to 20 lenses
Metering • TTL 35 zone SPC
• Metering range: EV 0.0 - 20 EV
Metering modes

• Evaluative 35 zone
• Partial (9% at center)
• Spot metering (approx. 3.8% at center)
• Center-weighted average

AE lock • Auto: One Shot AF with evaluative metering
• Manual: AE lock button
Exposure compensation • +/-2.0 EV
• 0.3 or 0.5 EV increments
Exposure bracketing • +/- 2.0 EV
• 0.3 or 0.5 EV increments
Sensitivity

• Auto ISO (100-1600)
• ISO 100 - 3200
• 0.3 or 1.0 EV increments
• H1 (6400) and H2 (12800) expansion

Shutter • Focal-plane shutter
• 100,000 exposure durability
• 30 - 1/8000 sec
• 0.3 or 0.5 EV increments
• Flash X-Sync: 1/250 sec
• Bulb
Aperture values • F1.0 - F91
• 0.3 or 0.5 EV increments
• Actual aperture range depends on lens used
White balance • Auto
• Daylight
• Shade
• Cloudy
• Tungsten
• Fluorescent
• Flash
• Custom
• Kelvin (2500 - 10000 K in 100 K steps)
WB bracketing • +/-3 levels
• 3 images
• Blue / Amber or Magenta / Green bias
WB shift • Blue (-9) To Amber (+9)
• Magenta (-9) to Green (+9)
Picture style • Standard
• Portrait
• Landscape
• Neutral
• Faithful
• Monochrome
• User def. 1
• User def. 2
• User def. 3
Custom image parameters • Sharpness: 0 to 7
• Contrast: -4 to +4
• Saturation: -4 to +4
• Color tone: -4 to +4
• B&W filter: N, Ye, Or, R, G
• B&W tone: N, S, B, P, G
Image processing

• Highlight tone priority
• Auto lighting optimizer (4 settings)
• Long exposure noise reduction
• High ISO noise reduction (4 settings)
• Auto correction of lens peripheral illumination (vignetting)

Color space • sRGB
• Adobe RGB
Viewfinder • Eye-level pentaprism
• 95% frame coverage
• Magnification: 0.95x(-1 diopter with 50 mm lens at infinity)
• Eyepoint: 22 mm
• Interchangeable focusing screen Ef-A standard (2 other types optional)
• Dioptric adjustment: -3.0 to +1.0 diopter
Focusing screens
(optional)
• Ef-A (Standard Precision Matte - included)
• Ef-D (Precision Matte with grid)
• Ef-S (Super Precision Matte for easier manual focus)
Mirror • Quick-return half mirror (transmission:reflection ratio 40:60)
• Mirror lock-up (once or multiple exposures)
Viewfinder info • AF points
• Focus confirmation light
• ISO sensitivity
• Shutter speed
• Aperture
• Manual exposure
• AE Lock
• Exposure compensation amount
• AEB level
• Spot metering area
• Flash ready
• Red-eye reduction lamp on
• High-speed sync
• FE Lock
• Flash compensation amount
• ISO speed (while changing)
• WB correction (while changing)
• Highlight tone priority icon *
• B&W mode icon
• Warnings
• Maximum burst for continuous shooting
• Buffer space
LCD monitor • 3.0 " TFT LCD
• 920,000 pixels
• 7 brightness levels
• 160 ° viewing angle
• Dual anti-reflection
LCD Live view

• Live TTL display of scene from CMOS image sensor
• 100% frame coverage
• 30 fps
• Real-time evaluative metering using CMOS image sensor
• Best view or exposure simulation
• Silent mode
• Grid optional (x2)
• Magnify optional (5x or 10x at AF point)
• Three AF modes - Live mode/Quick mode/Face Detection
• Histogram
• Remote live view using EOS Utility 2.0 (via USB or WiFi/Ethernet using WFT)

Record review • Off
• On (histogram via INFO button)
• Display mode same as last used Play mode
• 2 / 4 / 8 sec / Hold
Playback modes

1. Single image with exposure, file number, storage slot
2. As 1 but also image count and quality
3. Detailed exposure information, thumbnail and luminance histogram
4. Less detailed exposure info., thumbnail, luminance and RGB histograms

Playback features • Optional blinking highlight alert
• Optional AF point display
• Magnified view (up to 10x)
• 2x2 or 3x3 thumbnail index
• Jump (by 1, 10, 100 images / by screen or date)
• Delete / Protect
Flash • Auto pop-up E-TTL II auto flash
• FOV coverage up to 17 mm (27 mm equiv.)
• Guide number approx 13 m / 43 ft (ISO 100)
• Cycle time approx. 3 sec
• Flash compensation +/-2.0 EV in 0.3 or 0.5 EV increments
• X-Sync: 1/250 sec
External flash • E-TTL II auto flash with EX-series Speedlites
• In-camera flash configuration (currently only 580 EX II)
• Wireless multi-flash support
• PC Sync
Shooting modes

• Auto
• Creative auto
• Program AE (P)
• Shutter priority AE (Tv)
• Aperture priority AE (Av)
• Manual (M)
• Auto depth-of-field
• Portrait
• Landscape
• Close-up
• Sports
• Night portrait
• Flash off
• Camera user settings 1
• Camera user settings 2

Drive modes

• Single
• High-speed continuous: 6.3 fps
• Low-speed continuous: 3 fps
• Self-timer: 2 or 10 sec (3 sec with mirror lock-up)

Burst buffer • Large/Fine JPEG: 90 frames (with UDMA card)
• RAW: 16 frames
Orientation sensor Yes
Auto rotation • On (recorded and LCD display)
• On (recorded only)
• Off
Custom functions 25 custom functions with 74 settings in 4 groups
Menu languages

• English
• German
• French
• Dutch
• Danish
• Portuguese
• Finnish
• Italian
• Norwegian
• Swedish
• Spanish
• Greek
• Russian
• Polish
• Czech
• Hungarian
• Romanian
• Ukrainian
• Turkish
• Arabic
• Thai
• Simplified Chinese
• Traditional Chinese
• Korean
• Japanese

Firmware User upgradable
Portrait grip • Optional WFT-E3/E3A
• Optional BP-E2N battery grip
• Optional BP-E2 battery grip
Connectivity

• USB 2.0 Hi-Speed
• Video out
• HDMI connector
• N3 type wired remote control
• PC Sync flash terminal
• Communication terminal on base for WFT-E3/E3A

Storage • Compact Flash Type I or II (inc. FAT32)
• Supports UDMA cards
• Canon Original Data Security Kit supported ("Original Image Data")
• No CF card supplied
Power • Lithium-Ion BP-511A rechargeable battery (supplied & charger)
• Supports BP-511 / BP-511A / BP-512 / BP-514
• CR2016 Lithium battery (date/time backup)
• Optional AC adapter
Wireless connectivity
(optional WFT-E3/E3A)
• Mounts on base of camera and also acts as vertical grip
• Has its own BP-511A battery
• Wireless 802.11b / 802.11g
• Wireless security: WEP, TKIP/AES, WPA-PSK, WPA2-PSK
• Wireless methods: Infrastructure or Ad Hoc
• Wired ethernet (100 Base-TX)
• Transfer: FTP, PTP (remote control by computer), HTTP (view / remote fire)
• USB host capable: External hard drives, flash drives
• USB comms: GPS devices (records coordinates and altitude in image header)
Dimensions 146 x 108 x 74 mm (5.7 x 4.2 x 2.9 in)
Weight • No battery: 730 g (1.6 lb)
• With battery: 822 g (1.8 lb)


Canon EOS 50D Digital SLR Camera (15.1MP, 3" LCD, ISO 12800) (Canon Malaysia)