The camera you are using has a pixel size of 10 by 10 microns. Your camera has 320 by 240 pixels. What this tells you is how big an object you can images with one image. You have a field of 6.2 x 4.6 arc minutes. This is the size of one of the smallest Messier objects.
Lets look at a different configuration.
We now have the desired 2 arc seconds per pixel. We can now capture all but the very largest Messier objects. You can shorten the focal length of a telescope with a focal reducer. Let's try one more configuration. You now have a camera with pixels of 23 by 27 microns.