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I remember when I bought my super-rotator there was a lot of hartblei, vs hartblei-kiew, vs whatever, some group in atlanta, Arsenal vs ukranian vs Czech manufacture of glass.That page seems to have been taken down now, or unobatainable, although I know what it was...... If it does not say 'Zeiss' then presumably it's not. Also, Hartblei are a Ukrainian operation and there is 45mm f3.5 Arsat/Volna made originally in the 'Arsenal' in Kiev.
Hartblei are a good company but there are those who muscle in on their operations so make sure that it IS a Hartblei product and that you are dealing with them and not someone else.
Also, this product seemed very expensive.......so beware!
EDIT; the site for Hartblei 'HCam B1' list a 40mm f4 as their wide TS lens.... See also http://www.rickdenney.com/hartblei.htm
THere is a BUNCH of sample to sample variation in these lenses. I have owned a total of 6, and of those only two were any good shifted more than a few mm. My current one I just received from Tim Ashley -- it is the best one I've seen, and does pretty well shifted to 10mm, corners are definitely softish, but usable. Tilts work as advertised. One interesting thing about these lenses is every one I've tested has one area somewhere in the IC that is a little smeary-soft. My latest one is no exception, doing that on the mid RH side. However it again is still usably sharp.I had one a few years ago on a P45 back w/AFD body. Did OK for slight tilts around f8. Did terrible with even slight shifts. Lots of CA and softness. Might have had a bad copy but I sold it right away and went to focus stacking.