Hi All, First of all I would like to thank all members of this forum for posting so many good answers and solutions. This forum is a great source for learning about P2V. I'm new to quadcopters so I'm learning every day. Last weekend I updated all my software of P2V, that was quite challenging, but I think I succeeded. Then I did a flight and took some raw photo's in DNG format. http://www.flickr.com/photos/83953651@N04/12271318125/ After making a raw photo it took about 14 seconds before the display on the smartphone showed the live view again. At first I thought of a mallfunction but then I realised that the raw files would be much larger than JPG so it would take much longer to write the image to the MicroSD card. The JPG file is about 3-5 MB's and that takes about 3 secs, the RAW fies is 28 MB. I experimented a bit with another MicroSD card, a Class 4 8Gb MicroSD card from Transend. With that card it took about 9 secs to write the RAW image. What's strange here is that the size of the photo (L/M/S) doesn't seem to influence the duration. Next I did some research on the internet. A Class 10 card writes about 10 Mb/s so I guess it would take about 3,5 s to write the image, almost the same as the JPG. The fastest card I can find is a Sandisk Extreme PRO microSD kaart 16 GB UHS1 45MB/s € 79,99. I guess using this card it would take less then 1s to take a photo. Any advice or other findings?