[chmatthew]

Hi All,
I like to (occasionally) try and draw some of the things I am observing. I have seen eyepieces like the Celestron micro-guide eyepiece which has a lot of different calibrations etched onto it so that you can work other thinks like angular separation and so on, but I was wondering if anyone know of a similar item which just has a grid on it so that it is like you are looking through a sheet of graph paper? such a thing would be very handy for getting the scale of some of the drawings correct.
Chris