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JPEG/TIFF Image Size & Quality

The P5 offers the same range of image size and JPEG quality selections as the DSC-S75. You can choose from a combination of image sizes and two different JPEG quality levels as well as TIFF uncompressed format.


Standard Test Scene

To give an impression of what some of the combinations of image size and quality produce the table below is a cross reference of some of them:

  • 2048 x 1536 TIFF
  • 2048 x 1536 FINE JPEG
  • 2048 x 1536 STANDARD JPEG
  • 1600 x 1200 FINE JPEG
  • 1280 x 960 FINE JPEG
  • 640 x 480 FINE JPEG

Images below are cropped 240 x 100 area of the image magnified 200% (nearest neighbour).


 
2048 x 1536
TIFF
9,219 KB (Not available for download)
JPEG
FINE

1,390 KB
JPEG
STD

792 KB
 

 
1600 x 1200
JPEG
FINE

847 KB
 

 
1280 x 960
JPEG
FINE

593 KB
 

 
640 x 480
JPEG
FINE

152 KB

As you can see close-up there's very little difference between the TIFF and JPEG Fine. The additional JPEG Standard still offers good image quality at about half the size of the Fine image. Just like the DSC-S75 the 640 x 480 images always seem to look soft.


ISO (Sensitivity) Adjustment

ISO equivalence on a digital camera is the ability to increase the sensitivity of the CCD to allow for faster shutter speeds and/or better performance in low light. The way this works in a digital camera is by "turning up the volume" on the CCD's signal amplifiers, nothing is without its price however and doing so also amplifies any noise that may be present and often affects colour saturation.

The P5 (unlike the older P1) now features three selectable ISO sensitivities of 100, 200 and 400 as well as an Auto mode which varies sensitivity between ISO 100 and 300 automatically depending on available light.

ISO Auto (120), 1/50 sec, F4.0
ISO 100, 1/40 sec, F4.0
ISO 200, 1/60 sec, F4.0
ISO 400, 1/100 sec, F4.0

Noise is relatively low, isolated mainly to chromatic (colour) noise only visible in shadows / dark areas. All in all a very impressive performance for an ultra-compact camera.


Picture Effects

Just like the rest of the Sony DSC family the P5 offers a range of post-processing image effects, these range from the slightly wacky negative art to black and white.

No picture effect Negative Art picture effect Sepia picture effect
 
Black & White picture effect Solarize picture effect  

Note that as well as this you can use the "TEXT" mode to shoot black and white (2 colour) photocopy style GIF's (useful for copying text, although slow to process) and apply a date-stamp onto the image (same as S75).

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