GPU objective is an oil spaced fluorite triplet made of FPL53 and ZK7 glasses. Strehl is above 98%. Optical quality meets the highest expectations.
Objective diameter 120mm focal ratio f8.
Sharp edge baffles in oversize (170mm diameter) AlMgSi(1) tube, 180mm back focus.
2,7" focuser (104mm travel lenght), with a 1.8 degree/step stepper motor drive. Controller can be connected to PC via RS232 port and accepts LX200 orders. One step counts 0,017 mm. Focuser react even one step. Gear ratio is 1:11.
SIMILAR Focuser at work can be seen: http://www.youtube.com/watch?v=zBn8JFcwKAk
Objective designed and manufactured in Hungary. All mechanical parts come from EU. No Far-East contribution.
Please feel free to ask for more details.
pictures: http://www.facebook.com/media/set/?set= ... 234&type=1