I understand them to be F/8... Taking an image of a starfield and doing a plate solve will give you the answer to that question though...
Congrats on your new scope, It definitely looks the business.. I wish you all the best with it and look forward to some images!
Ps. Might I suggest removing anything that is not 100% required from the mount... It looks very heavily loaded in that image.. To get good results at this sort of focal length, you really want to minimize the amount of strain on the mount.