Here's an example of a third angle orthographic drawing of an SLR camera. Try drawing the orthographic views using software such as 2D Design.
Download the SketchUp model to see it in more detail.
Draw your own 3rd angle orthographic drawing usng 2D Design or Solid Works. Also include a 3D (isometric) view on the sheet (created in Sketchup or Solid Works).
Using recognised conventions, include some dimensions on the orthographic drawing. (No colour is required on the orthographic drawings).