When it comes to teaching people its often the detail that counts and more is always better being able to share your ideas and knowledge with a large audience can be difficult but a huge benefit with the optoma dc450 you simply position items under the camera connect it to a projector and show everything on the big screen live as it happens information becomes clear and everyone shares your vision the dc450 features a 8 megapixel sensor 80x total zoom 10x optical zoom 8x dig