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Yes the original toucam lens is removed.But inside the 1 1/4" to 1 1/4" adapter there is a 120mm FL 30mm dia. coated achromat about 60mm in front of the toucams sensor.This acts as a field reducer changing the 600mm F5 Saxon to a about 320mm F2.7.The effect of this is all stars are brighter and there are more in the field.So finding a guide star is easy even when pointing to an area of the sky with only dim stars.In fact the toucam easily sees stars less than mag 8 or 9 in real time ie when using guidedog.
If you ever want to image larger fields with the toucam this is the way to go.Since the sensor is only about 5mm field curvature is not a problem.
Bert
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