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Timings & File Sizes

All in all the C-40Z is fairly quick. It's weakness is in the 6 second startup time and potentially the write speed of SmartMedia (although the camera does have a fairly sizeable internal buffer). Focus, LAG and shot to shot times are all very respectable and in line with other compact four megapixel digital cameras. The internal buffer is sizeable enough to allow you to shoot continuously at 1.2 fps for 19 two megapixel (1600 x 1200) images, not bad at all.

Timing Notes: All times calculated as an average of three operations. Unless otherwise stated all timings were made on a 2288 x 1712 SHQ JPEG image (approx. 2.4 MB per image). Timings taken using a 128 MB TwinMOS SmartMedia card.

Power on tests were carried out with the lens cover 'almost fully open', there's a notch at the end of the covers travel, past this notch the camera powers up. Play power on test was carried out with the lens cover closed by simply pressing the display button.

Action Details Time, seconds
Power: Off to Record Lens extension 5.8

Power: Off to Play *1

Image displayed 3.2
Power: Record to Off Lens extended 3.4
Power: Play to Off *1 Lens retracted 3.4
Mode: Record to Play Image displayed 1.4
Mode: Play to Record Lens extended 1.1
Play: Magnify Each zoom level 0.5
Rec: Thumbnail view 9 images 1.0

Action Details Time, seconds
Zoom from Wide to Tele Full zoom from 35 mm to 98 mm (2.8 x) 2.7
Auto Focus LAG Wide angle (35 mm) ~0.9
Auto Focus LAG Telephoto (98 mm) ~1.2
Shutter Release LAG Using viewfinder <0.1
Shutter Release LAG Using LCD monitor <0.1
Total LAG *3 0.9 - 1.3
Off to Shot Taken   6.2
Shot to Shot Zoom at wide angle, record review enabled 2.6
Shot to Shot Zoom at wide angle, record review disabled 2.3

*1 You need to 'hold' the PLAY lever in its right most position for at least 1.3 seconds for the camera to recognize that as a change of power state (on or off), this is to avoid accidental knocks of the lever. The timings shown for this measurement are EXCLUDING this 1.3 seconds.
*2 AF was approximately 0.5 seconds slower at full telephoto and about 0.3 seconds faster at full wide angle.
*3 Depending on focus

Auto Focus LAG is (roughly) the amount of time it takes the camera to autofocus (a half-press and hold of the shutter release button), this timing is normally the most variable as its affected by the subject matter, current focus position, still or moving subject etc. This timing is an average.

Shutter Release LAG is the amount of time it takes to take the shot after autofocus, this timing assumes you have already focused (half-pressed the shutter release) and now press the shutter release button all the way down to take the shot. This timing is an average.

Total LAG is the total time it takes (not just the two above added together) if you haven't pre-focused, that is no finger touching the shutter release button, press it all the way down in one movement, this new timing is how long it'd take if you were in one of those spur-of-the-moment situations. This timing is an average.


Continuous modes

The table below shows the results of our continuous shooting test, indicating the actual frame rate along with maximum number of frames and how long you would have to wait after taking the maximum number of frames before you could take another shot. Timings taken using a 128 MB TwinMOS SmartMedia card.

Mode Image Type Frames per sec Max no. of frames *1

Wait before
next shot
*2

Continuous 2288 x 1712 SHQ 1.4 fps 3 11.0 sec
Continuous 2272 x 1704 HQ 1.1 fps 9 6.5 sec
Continuous 1600 x 1200 SQ1 Normal 1.2 fps 19 5.2 sec
Continuous 1024 x 768 SQ2 Normal 1.2 fps 53 4.4 sec
Continuous 640 x 480 SQ2 Normal 1.2 fps 155 3.6 sec

*1 In a single "burst" (finger held down on shutter release)
*2 You can take a frame as soon as there is space in the cameras internal buffer (writing continues "in the background").

A good performance for a 'pocket camera', the C-40Z's buffer is capable of holding three SHQ images (approx. 2.4 MB each), reducing the image size and quality a little and you can happily fire off 53 frames at XGA resolution. Switching to continuous AF mode (where the camera re-focuses between each shot) reduces shooting speed to approximately 0.7 fps.


File Write / Display and Sizes

Timings shown below are the time taken for the camera to process and "flush" the image out to the SmartMedia card, the timer was started as soon as the shutter shutter click was heard and stopped when activity indicator LED beside the SmartMedia compartment door went out. This means the timings also include the cameras processing time (approx 0.5 sec) and as such are more representative of the actual time to "complete the task". Timings taken using a 128 MB TwinMOS SmartMedia card.

Image Type Time to store
(seconds)
Time to display
(seconds)
File size *1
(approx.)
No. on supplied 16 MB CF Card
2288 x 1712 SHQ 6.1 1.4 2,300 KB 5
2272 x 1704 HQ 3.7 0.9 950 KB 16
1600 x 1200 SQ1 High 3.9 0.9 1,080 KB 11
1024 x 768 SQ2 Normal 2.4 0.5 190 KB 76
640 x 480 SQ2 Normal 1.7 0.5 70 KB 165

*1 All file sizes are an average of three files. As is the case with JPEG it's difficult to predict the size of an image because it will vary a fair amount depending on the content of the image (especially the amount of detail captured). For example, take a photograph of a fairly empty wall and you'll get a small JPEG, take a photograph of a bush with a lot of detail and you'll get a larger image. File sizes here are closer to the later, the larger size of file you should expect.

Subtractin the processing and preparation time (approx. 0.5 seconds) from the above timings we can calculate that the C-40Z has a write speed (with this particular SmartMedia card) of approximately 380 KB/sec.


Battery life

We ran the camera through our new battery life test. This test is designed to be fair and comparative to each camera and battery type:

  • Take 4 shots without flash
  • Wait 2 minutes (50% of the time powering the camera off)
  • Take 1 shot with flash
  • Wait 1 minute
  • Repeat

Batteries are fully discharged and recharged before the test and all cameras were reset to their factory default settings. Here are the results:

Camera
Compact / Ultra compact
Battery Power Battery life Number of shots
Kyocera S3 BP-800S 2.1 Wh 54 mins 95
Canon PowerShot S300 NB-1L 2.5 Wh 1 hr 26 mins 155
Pentax Optio 430 D-LI2 3.3 Wh 1 hr 33 mins 160
Olympus C-40Z 2 x AA NiMH 1600 mAh (GP) 3.6 Wh 1 hr 33 mins 165
Nikon Coolpix 3100 2 x AA NiMH 1600 mAh (GP) 3.6 Wh 1 hr 42 mins 175
Minolta DiMAGE F100 2 x AA NiMH 1600 mAh (GP) 3.3 Wh 1 hr 42 mins 175
Minolta DiMAGE X NP-200 2.8 Wh 1 hr 45 mins 180
Pentax Optio 330 D-LI2 3.3 Wh 1 hr 48 mins 185
Canon PowerShot S330 NB-1LH 2.5 Wh 1 hr 48 mins 185
Sony DSC-P71 2 x AA NiMH 1600 mAh (GP) 3.6 Wh 1 hr 50 mins 185
Kodak DX4900 2 x AA NiMH 1600 mAh (GP) 3.5 Wh 1 hr 51 mins 190
Sony DSC-P5 NP-FC10 2.4 Wh 1 hr 51 mins 190
Nikon Coolpix 3500 EN-EL2 4.1 Wh 1 hr 54 mins 195
Sony DSC-P9 NP-FC10 2.4 Wh 1 hr 59 mins 200
Nikon Coolpix SQ EN-EL2 3.7 Wh 2 hr 03 mins 210
Minolta DiMAGE Xt NP-200 2.8 Wh 2 hr 12 mins 225
Canon PowerShot S400 NP-1LH 2.5 Wh 2 hr 17 mins 230
HP Photosmart 812 2 x AA NiMH 1600 mAh (GP) 3.6 Wh 2 hr 21 mins 240
Nikon Coolpix 885 EN-EL1 4.8 Wh 2 hr 21 mins 240
Nikon Coolpix 775 EN-EL1 4.8 Wh 2 hr 27 mins 250
Canon PowerShot SD100 NB-3L 2.9 Wh 2 hr 29 mins 250
Pentax Optio S D-LI8 2.6 Wh 2 hr 33 mins 260
Nikon Coolpix 2500 EN-EL2 4.1 Wh 2 hr 33 mins 260
Fujifilm FinePix F601Z NP-60 3.7 Wh 2 hr 47 mins 275
Casio EXILIM EX-Z3 NP-20 2.5 Wh 2 hr 48 mins 285
Casio EXILIM EX-S3 NP-20 2.5 Wh 2 hr 48 mins 285
Olympus C-50Z LI-10B 4.0 Wh 2 hr 54 mins 295
HP Photosmart 935 2 x AA NiMH 1600 mAh (GP) 3.6 Wh 3 hr 09 mins 320
Canon PowerShot A70 4 x AA NiMH 1600 mAh (GP) 7.7 Wh 5 hr 08 mins 515
Other test notes:
 • LCD monitor is left on during the battery test
 • The camera is powered off half of the time and left on half of the time (switch every 10 iterations)
 • There are now higher capacity AA NiMH batteries available, however in the interests of fair
    comparison we will continue to use our 1600 mAh test set

The C-40Z lasted approximately as long as Canon's IXUS 300. Considering the additional power available from the two GP NiMH's I'd have expected it to last longer. So, an average performance, the only saving grace would be that AA's are readily available and most rechargeables come in four packs, so you'll almost always have a spare set.

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