I am using the actus with a Sony A7r and a Canon 5dmk3 with apo-rodagons, Digitars and Apo-componon HM lenses.
The system is amazing, it is very welll built and the layout is very logic. my single gripe would be, that it doesn't extend a lot, you can rotate the front standart to gain some 5cm, but still with a 120mm lens the magnetic bellow tends to pop off, especially when you use movements.
one thing you should really consider with it is a geared tripod head.
as it only allows front tilt and swings, one has to readjust the framing everytime you bend the lens, a geared head makes this very simple. It is brilliant, that the rail is Arca compatible, this allows to add things to the camera like a flag, as you can see in mey picture. I am using it on a Foba Studio stand with a Cube head.
Lenses: any rather modern enlarger lens will do, probably the best bang for the buck is the Apo Rodagon N. I own both the Apo and the non-Apo 80mm, the difference it minor, both are unbelievable lenses, I bought my non Apo for 50€, the Apo for €250.
with the Sony I can use down to 45mm lenses, shorter restricts movement quite a bit, so that would be a 90 equiv. on M43.
With the canon 60mm is just about workable, 80mm is ideal.
I used or owned more or les any available T/S solution for SLRs (canon tse, Mirex, Hartblei, Zörk, Lensbaby, adapted to a Linhof 679, Cambo X-Pro2) and nothing ever came close to the usability of the Actus.
