Lost all photos on card and don't know how it happened. Is there a way to recover at least the last 50 photos taken? What could have caused it so it doesn't happen again. Card has capacity for 900 photos. LJansen

You may accidentally delete them all. If you really want to get them all back, you'd better try my ways:
Firstly, stop using this camera immediately in case that any new file would overwrite your original photos and make them gone permanently. So, you should take care!
Secondly, plunge this camera to your computer and prepare to retrieve all your deleted pictures.
Thirdly, apply a deleted photo recovery freeware to retrieve all your deleted photos back successfully:
http://blog4mark.blogspot.com/2012/12/photo-recovery-after-delete.html
I believe this data recovery freeware can work perfectly on your camera memory card just in the same way as it completely retrieves all the deleted data of my friend off from his phone memory card. Just give it a shot!
Fourthly, save and back up all the restored photos on a different memory card or drive in case of data recovery failure.
Note: Never forget to back up everything important at least on two memory cards or locations in the future.
Good luck!

Hello

Download THIS.

Download this free tool and run it on you card and it should be able to recover all pictures provided that you have not used the card since formatting. I recommend using a card reader for this.

After downloading and running (no installation required) , simply select deep scan and your memory card and it will start scanning, To recover a found file , right click it and select save.

Please note that the file names will probably not be available and also that some of the properties of the photo like date taken could be lost.

Please let me know when you have recovered your pictures safely or contact me if you need further assistance.

Regards
Andrea