Help needed on Schneider Tele-Xenar 5,5 270mm

BradS said:

Do you, perhaps, mean the 270mm f/5.5 tele-Arton? according to this old Schneider optics "vintage lens data" web page, the filter thread is: M 77 X 0.75
http://web.archive.org/web/20020621...e_format_lenses/tele-arton/data/5.5-270mm.htm

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halfaman said:

Here you have it. It is a Technika 6x9 lens.

https://www.largeformatphotography....ele-Xenar-versus-Tele-Arton-250-and-270/page2 (last entry)

I have a Tele-Xenar 5,5/270 coated (red triangle, single-coated), made in 1951. It's 480g mounted in a Technika board. Filter size is 58mm. FFD is 162mm (not a typo). Mine is in a Compur #2 dial-set shutter, with a min aperture of f/57. Image circles at infinity (full pupil) are: f/5.5-f/16= vignettes; f/16= 154mm; f/22= 170mm; f/32= 184mm; f/45= 191mm; f/57= 194mm. Full cut-off of pupil occurs at 215mm -- it's a 4x5 lens with very little movements. Sharp all across the image area.

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