A good camera.
The first piece of equipment you need is a good camera. This will help you to capture clear photos of the thing that you want to blog on.
A tripod will help you keep the camera steady when shooting to avoid handshake.
A less will bring you to bring light to a fixed focal point. This will help in taking clear photos of the item that one wants to blog on.
With all this equipment, I assure you that your photography blog will be awesome!