I am a little confused by something Kerry Thalmann wrote; on the one hand, this page on Kerry's website indicates that the Fujinon A and the Docter Germinar have similar coverage. On the other hand, according to one of Kerry's post on this forum , the Docter lens has larger coverage. Kerry and others, could you clarify ? Thanks much in advance. By the way, how much does the Docter lens weigh in a Copal #1 shutter ?