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Tethered

PostPosted: Thu Mar 12, 2009 5:12 am
by MichaelEzra
It would be great to have an option to preserve the images on flash card in the camera as a backup - so that as a custom option FPV would copy images instead of moving them.

Re: Tethered

PostPosted: Thu Mar 12, 2009 7:19 pm
by Axel
FastPictureViewer does not move the images during tethered shooting. What really happens depends on the camera's firmware and how the PTP/MTP mode was implemented but the default behavior is to leave a copy on the card. FPV never, ever deletes an image unless you enable and actually use the Ctrl+Del command, but this would not aplpy to the thethered case anyway.

Re: Tethered

PostPosted: Thu Mar 12, 2009 10:44 pm
by MichaelEzra
Axel, thanks for the reply.

I've written a simple VB program that transfers file using WIA from D700.
I think this is using PTP. I end up with images on flash card and in the computer. When tethered to FPV D700 will not have any files on the flash card.

Are there any settings that could be tweaked?

My original post seems to have been changed.
There was a question about progress bar for tethered image downloading.
Do you think you may add this feature?

Thanks,

Re: Tethered

PostPosted: Thu Mar 12, 2009 11:21 pm
by Axel
FPV uses WIA on XP only. It's surprising that the D700 does not write the image in PTP mode, this behavior is different from what the D3/D2/D40 do. Do you have any Nikon tethering software installed, by any chance, or some 3rd party tethering software using the Nikon SDK?

There is no plan to add a progress indicator at this time.

Re: Tethered

PostPosted: Fri Mar 13, 2009 4:35 am
by MichaelEzra
Do you have any Nikon tethering software installed, by any chance, or some 3rd party tethering software using the Nikon SDK

No...

Re: Tethered

PostPosted: Fri Mar 13, 2009 4:58 am
by MichaelEzra
btw, I re-tested, the D700 does write to the flash card while is tethered to FPV!

Re: Tethered

PostPosted: Fri Mar 13, 2009 11:32 am
by Axel
This is how it is supposed to work. On the other hand the Nikon software (CCP2) downloads the images directly and bypasses the memory card entirely. For that they use a specific driver and protocol extension but the standard PTP behavior is to write to the card first, then notify the host computer of a picture arrival.

Note that, given the above, the memory card's write speed has an influence on the lag you see between shutter activation and the display of the picture on the computer. The faster the card write speed, the shorter the lag. You can also play with JPG+RAW and try with a medium or small JPEG. Both files are transfered but the JPG seems to be sent first and since it's small the lag is short.