RA7903 & RA948
Please excuse my writing in english. (Mein deutsch ist gar stolprig): The Kinoptik lenses for optical amplifiers came with or without "elbow" and could be combined with the 100mm f2 for 24x36mm. Without the extra lens their image circle was listed as 25mm. The 948 had a focal length of 100,9 mm - which shows that they were quite serious about specifications. My early 100mm that Henry has in his care has a strange number and earlier type finish, so it may not be equivalent to my later Alpa-mount 100mm, but the general Kinoptic spec.sheet gives 106,2mm.
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