What does the "CP Timer" do, in a DP1x camera?

AndyNewton

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There is a puzzling menu option tucked away deep inside my Sigma DP1x.

I cannot figure out what it does by shooting experiments or by web searches. The mystery option is not present in my Sigma DP2s. It is only in the DP1x.

Sadly, my DP1x user manual is long gone. Does anyone know what the Sigma DP1x camera's "CP Timer" is for?

Here is what I have figured out so far .....

Extra item in the Capture Settings Menu:
  • DP2s Capture Settings Menu - 21 items including the items "Drive Mode" and "Interval Timer"
  • DP1x Capture Settings Menu - 22 items (one more than the DP2s). All same as the DP2s except that between "Drive Mode" and "Interval Timer" is one extra item "CP Timer setting" with four options: 5sec, 10sec, 30sec and 60sec.
Extra item in the Qs2 menu:

The CP Timer duration is set in the Capture Settings menu as above. Its function, whatever that is, is made active or inactive in the Quick-Set menu 2, accessed by pressing the QS button.
  • In the DP2s, the drive options cycle through four options: Single Shot, Continuous Shots, 2sec delay timer and 10sec delay timer.
  • In the DP1x the same four drive options are present, plus a fifth option "CP".
What it does ( ? ? ? ? ? ? )

I have the CP Timer setting value set to 30sec in the Capture Settings Menu.

I have drive mode set to "CP" in the Qs2 menu.

The DP1x camera's shooting display screen now shows all the normal features, plus "CP" in a box at the upper left corner of the screen and "CP TIMER 30s" with a short line of four white dashes at the lower right corner of the screen.

When I press the shutter release button the camera records one picture, as normal. Also the text "CP TIMER 30s" starts counting down (29s, 28s, etc.), and the line of four white dashes changes to only three white dashes, and below those dashes a small red flashing symbol appears showing a red arrowhead in a red box and a bent arrow pointing down towards the physical camera button normally used for image playback. (That button is of course labelled on the camera body with a red arrowhead in a red box.)

During this CP Timer countdown I can do the things listed below. None seem to have any purpose!
  • Press the physical (red labelled) image playback button. Result - The countdown is cancelled.
  • Press the shutter release button. Result - The camera records another image, and the CP countdown restarts at 30sec.
  • Do nothing. Result - The countdown runs down to 00sec then there is short pause whilst the camera transfers into the memory card the one image captured at the time when the shutter release was pressed.
 
Solution
At last I have stumbled into the answer. The "CP" option is for fast shooting with a DP1x. Remarkable. And it actually seems to work rather well!

In the Capture Settings Menu, item 7, "Drive Mode" are the same options as in the Quick-set Qs2 menu, but here the option is shown in full as "CP Capture Priority".

A web search for the full name of this feature turns up a hit at last. From Sigma "Additional Instruction Manual for DP1x firmware 1.03".

(See the link in a post from xpatUSA recently in this thread.) (OOps, it' gone. Sorry, you will have to read this longer post instead now. :-) )

The firmware 1.03 manual, paraphrased, says that Capture Priority allows photos to be taken in rapid succession until...
Might be an artifact of some feature that didn't make the cut when the final firmware was released! Does indeed seem to be a useless 'feature'!
 
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At last I have stumbled into the answer. The "CP" option is for fast shooting with a DP1x. Remarkable. And it actually seems to work rather well!

In the Capture Settings Menu, item 7, "Drive Mode" are the same options as in the Quick-set Qs2 menu, but here the option is shown in full as "CP Capture Priority".

A web search for the full name of this feature turns up a hit at last. From Sigma "Additional Instruction Manual for DP1x firmware 1.03".

(See the link in a post from xpatUSA recently in this thread.) (OOps, it' gone. Sorry, you will have to read this longer post instead now. :-) )

The firmware 1.03 manual, paraphrased, says that Capture Priority allows photos to be taken in rapid succession until the camera internal buffer is full. Without Capture Priority you have to wait for one image to be transferred to the memory card before the camera can take another shot.

Testing this, recording images as Jpeg/fine/full-res, and set to manual focus so no focusing delay at each image capture....

Normal Single Shot mode (Not Capture Priority) .... After taking one picture the shutter release can be pressed and a new image recorded as soon as the screen returns to full display after being blacked out. (You don't have to wait for the flashing red light to stop flashing). Testing repeated shots over a period of 1 minute gave me 20 shots. This is a 3 second wait between images.

With Capture Priority Mode active
..... As before, shutter can be pressed again as soon as the screen returns to full display after being blacked out. But this happens much faster now. I managed 4 shots in 3.4sec to 3.7sec. This is a wait between images of 1.1 to 1.3 seconds. Much faster!

After 4 shots the buffer was full, and so I have to wait for a slightly longer transfer of all the images in the buffer onto the memory card. Still barely more than 3 seconds though.

During rapid shooting I observed the contents of the camera buffer being transferred to memory card when any of these events occur:
  • when buffer is full (4 images with my settings above)
  • when the Capture Priority Timer runs down to zero time, as previously set in the Shooting Menu. In this test it was set to 30 seconds.
  • whenever you press the red-labelled image playback button
and during rapid shooting the line of white dashes on screen shrinks in length to show how much free buffer space remains.

This is all rather good! :-)

My thanks to all contributors for your rapid and helpful replies to this question.
 
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