You will need to purchase a Panorama head. This is a must to avoid parallax errors especially when objects are closer to the lens. A panorama head will allow the camera to rotate around the entrance pupil (EP) of the lens (this is the point of no parallax) and this will make the (EP) rotate around X and Y axis of the tripod centerline.
You can read more on setting up your camera/lens combination for the correct No Parallax Point in this thread.
The Samyang is a great entry price fisheye lens and really a good quality manual lens capable of very good shots. The correct shooting technique is (minimum) 4 shots in rotation @ 90 degrees (Yaw) click stops with -10 degrees tilt down. Followed by 1 Zenith/Up shot at +65 degrees. You might also like to shoot an offset Nadir/Down shot of where the tripod was positioned.
Though I have mentioned the "minimum" you will most likely find 6 rotational shots -10 degrees @ 60 degrees (Yaw) Click Stops and 2 +65 degrees 180 degrees apposed a better more reliable shooting sequence for ease of control point placement. Of course the Nadir/Down shot is again optional.
So your buy list is:
- Quality stable tripod
- Wireless Remote
I mention Wireless Remote because you need a way to shoot away from the camera to reduce shadows and movement etc (you can also use the camera Self Timer shooting option) but the wireless remote is a better option. If you need help on brands etc please ask.
Panoweaver software does the stitching from Easypano and Tourweaver compiles "tours" linking multiple rooms/scenes.
More on the Samyang 8mm Fisheye in this thread I started on another forum this time last year.