Just saw a Radar Anastigmat 12" F6.3.
It is mounted in an Ilex #5.
Huge lens. It appears that at some point the front rim of the lens which carries the name and SN, had the original Max F stop marking rooted out, and instead the "6.3" stamped in the cavity.
Google does not know about a Radar 12" 6.3 - can anyone point to a camera centric page that covers this? Or perhaps otherwise direct to info?
Is it possible this is in fact a 4.5? If so, what would be a simple way to test this?
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