Well after looking at Televue prices of there digital indicator for there focuses i was shock at the cost. The indicator and cable would set me back a shocking price of $1300. The data cable itself is $369 for a cable. Now i think this is a bloody rip off. So i got online and work out i could do the same thing for get this about $200. I found these guys really good
http://www.tresnainstrument.com/digi...FQsQagod7gTkJA
So i now have a digital read out on my focuser and comuter for allot less then it would cost from the shops that sell these things for televue. The resolution is 0.001mm/0.00005"