No product can become perfect without extensive testing. The G2 CCD camera was developed for more than 4 years, several test units were built over the time to test various concepts and to find optimal electronics design, mechanical construction and chip cooling. The last prototype seen its first light on June 2005.

Although the production cameras use blue-enhanced, microlensing chips with more than 80% QE, even the old KAF-0401 provided quite satisfactory image.