Ah?....yes, still fiddling around with this data
Here is an interesting comparison to show what a 6" F7.5 telescope can do today utilising modern imaging equipment and processing compared to a 1.2m F2.5 astrograph and photographic emulsion a generation ago:
http://www.pbase.com/strongmanmike2002/image/110608746/original
Qudos to him for how far ahead of the World Dr David Malin was at the time that he could extract such faint data from just a 70min exposure!
Mike