Blender camera and lamp angles

Artur Hawkwing writes: I encountered another problem. While rendering, I found that the rendered image of the unit was excessively blurry. I looked into it further and found out that the blurriness came only when a camera with a large orthographic scale was used (such as 300 or 350). I have my resolution set to 1600 x 900 at 100%. I also have 6 point lamps (but one only it there to cast shadows and casts no light) with 1.000 intensity (2 above, 4 to his sides) and 0.500 environmental lighting. However, this lighting scheme has been used in all my other renders with no problems.
Is this a problem with the cameras, lights, or something else?

Edit: never mind. Sorry for that. I had put on anti-aliasing, which blurred the image (as to why it was only blurred in ortho, I have no idea, though)