Hello,

I use Canon S5-IS.
I saw on youtube something called CHDK (Canon Hack Development Kit), and I found it really cool.
So I have some questions.

Can it damage the camera or the memory card?
I saw I need to upgrade the camera's firmware when I start the CHDK, is it safe? will it change something in my camera? Is it reversable?
Can I switch between CHDK and the regular OS without puting in a different card?
Is the card format to FAT16 necessary?
Is the CHDK OS hard to manage?



And the lens question.
I saw this video:
http://www.youtube.com/watch?v=6ASM7XrGc8I
And Idd like to know if this lens is good.
Will it work ok with my S5?

Please, if you can even answer one question, comment.

Thank you.:thumbsup: