Right.. so i went by gut on this one, and figured if they were historically french - they would use European marking and #5 typically would go for 11x14 or something like that.
So it arrived today. First of all its got weird air spacing both rear and front - i never yet saw spacing done with cardboard pieces.. but there you go..
Looks like 4 elements in 2 airspaced groups. Image circle indeed seems to be enough for 11x14 (just from on-the-wall projection).. Got to check focal later today with better instruments and on actual ground glass.
Anyone got any info on this lens? All i found was 8x10 petzval here on forum and flowers shot ages ago posted here and on flickr That was it.
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