Support Cameralabs by shopping at our partner stores or donating via Paypal
 






Follow my RSS feed at Camera Labs RSS Feed
 
  Latest camera reviews

Sony A3000 review
Canon EOS 1200D T5
Sony WX350
Nikon P600
Sony Alpha A5000
Sony Cyber-shot HX400V
Panasonic Lumix GH4
Panasonic TS5 FT5
Sony Alpha A6000
Canon SX700 HS
Canon SX600 HS
Olympus TOUGH TG2
Nikon AW1
Nikon D3300
Fujifilm XT1
Olympus STYLUS 1
Sony Cyber-shot RX10
Olympus OMD EM1
Panasonic Lumix GM1
Nikon D610
Sony Alpha A7
Nikon D5300
Canon PowerShot A2500
Sony Alpha A7r
Canon ELPH 130 IXUS 140
Nikon COOLPIX P520
Nikon COOLPIX L820
Canon PowerShot S120
Panasonic Lumix GX7
Canon SX510 HS
Canon PowerShot G16
Fujifilm X20
Panasonic FZ70 / FZ72
Canon EOS 70D
Sony RX100 II
Canon ELPH 330 IXUS 255
Panasonic Lumix GF6
Fujifilm XM1
Olympus EP5
Panasonic Lumix LF1
Panasonic TZ35 / ZS25
Olympus XZ2
Sony HX300
Panasonic Lumix G6
Sony HX50V
Fujifilm X100S
Canon SX280 HS
Canon EOS SL1 / 100D
Panasonic TZ40 / ZS30
Nikon D7100
Nikon COOLPIX A
Fujifilm X-E1
Canon EOS 6D
Nikon D5200
Panasonic Lumix GH3
Canon PowerShot S110
Panasonic Lumix G5
Sony NEX-6
Panasonic Lumix FZ200
Canon PowerShot SX50 HS
Nikon COOLPIX P7700
Olympus E-PL5
Canon EOS M
Panasonic TS20 / FT20
Canon PowerShot G15
Nikon D600
Nikon COOLPIX L810
Canon PowerShot D20
Sony RX100
Panasonic Lumix LX7
Canon SX500 IS
Fujifilm HS30 EXR
Sony HX200V
Panasonic FZ60 / FZ62
Canon 520HS / 500HS
Canon 110HS / 125HS
Nikon D800
Canon EOS T4i / 650D
Canon PowerShot A3400
Panasonic ZS15 / TZ25
Olympus E-M5
Nikon D3200
Fujifilm X-Pro1
Canon PowerShot A2300
Canon SX240 / SX260
Samsung NX200
Sony Alpha SLT-A77
Canon EOS 5D Mark III
Panasonic ZS20 / TZ30
Canon PowerShot G1 X
Sony NEX-7
Panasonic GX1
Olympus E-PM1
Nikon V1
Sony NEX-5N
Canon EOS T3 / 1100D
Canon EOS 600D / T3i
Nikon D7000
Canon EOS 60D
Canon EOS 550D / T2i
Canon EOS 7D

All camera reviews
 
 
   
 
  Best Buys: our top models
   
  Best Canon lens
Best Nikon lens
Best Sony lens
Best budget DSLR
Best mid-range DSLR
Best semi-pro DSLR
Best point and shoot
Best superzoom
Best camera accessories
   
 



Camera Labs Forum

Any questions, comments or a great tip to share? Join my Camera forum and let everyone know!
   
 
  DSLR Tips



 
Support me by shopping at B&H!
Canon PowerShot A640 Gordon Laing, November 2006

 
Canon PowerShot A640 gallery

The following images were taken with the Canon PowerShot A640. The A640 was set Large SuperFine quality, Auto White Balance, Evaluative Metering and with 'My Colours' switched off (the default setting for contrast, saturation and sharpening). The individual exposure mode, file sizes, shutter speeds, aperture, ISO and lens focal length are listed for each image.

The crops are taken from the original files, reproduced at 100% and saved in Adobe Photoshop CS2 as JPEGs with the default Very High quality preset, while the resized images were made in Photoshop CS2 and saved with the default High quality preset. The three crops are typically taken from far left, central and far right portions of each image.


Landscape: 4.10MB, Program, 1/500, f4, ISO 80, 7.3-29.2mm at 15mm (equivalent to 72mm)

  This landscape shot was taken with the A640 in Program mode and the camera's selected what sounds like a relatively large aperture of f4 - as our results pages show though, this is close to the sweetspot to the A640's lens.

The crops are sharp and detailed with no optical aberrations to worry about.
     


Portrait: 3.50MB, Aperture Priority, 1/640, f4, ISO 80, 7.3-29.2mm at 22mm (equivalent to 105mm)

  For this portrait shot we stepped back a little and zoomed-in to an equivalent of 105mm. We then opened the aperture as wide as it would go to blur the background.

The overall exposure is good, especially considering the contrast of light on the subject.

The crops are again very sharp and detailed, although again at f4, the lens is operating close to its sweetspot.
     



Still life : 2.97MB, Program, 1/250, f4, ISO 80, 7.3-29.2mm at 10mm (equivalent to 48mm)

  This photo was clearly taken under very bright conditions, but rather than close the aperture, the A640 selected a quick shutter in its Program mode to go with an aperture of f4. As mentioned above, this aperture is close to the A640's optical sweetspot.

As you'd hope, there's no noise at the A640's lowest sensitivity. The crops from the edges and corner are also very well-corrected, especially the flag badge which could have suffered from fringing with a lesser lens.
     


Macro: 4.41MB, Aperture Priority, 1/200, f8, ISO 100, 7.3-29.2mm at 7.3mm (equivalent to 35mm)

  The A640 can focus as close as 1cm with the lens zoomed-out, which can allow amazing macro opportunities, although you have to be careful not to cast a shadow at such close range.

This macro shot of components on a PC graphics card was taken from a distance of 2cm and we closed the aperture to f8 to maximise the depth-of-field.

There's some geometric distortion, but overall it's an impressive result and one of the best macro facilities around.
     


Indoor: 5.53MB, Program, 1/50, f2.8, ISO 400, 7.3-29.2mm at 7.3mm (equivalent to 35mm)

  To test the A640's indoor performance we took this shot with the sensitivity set to 400 ISO. Auto white balance resulted in an orange cast, so we manually adjusted it to Tungsten.

The crops clearly show some noise, but there's still a high level of detail. The A640 appears to favour visible noise and detail over the smearing of aggressive noise reduction. We prefer the A640's approach as the detail's retained and you can always apply third-party noise reduction later.
     



Indoor: 5.75MB, Program, 1/100, f3.5, ISO 800, 7.3-29.2mm at 13mm (equivalent to 62mm)

    Here we've used the A640's maximum sensitivity of 800 ISO and it's clear to see the noise levels have dramatically increased.

While the results at 400 ISO are ok, we'd say the jump to 800 ISO is for emergency use or small prints only.

That said, we still prefer the A640's approach of avoiding overly high noise reduction. There may be lots of visible noise speckles, but also a reasonable level of detail here.
     
   
     
   

If you found this review useful, please support us by shopping below!
All words, images, videos and layout, copyright 2005-2014 Gordon Laing. May not be used without permission.

/ How we test / Best Cameras / Advertising / Camera reviews / Supporting Camera Labs