I mentioned which bellows-based units I have at hand. Currently, I am using the Cambo Actus with some of the following lenses with various plates.
Nikkon AM-ED 120mm
Schneider 120mm f/5.6 Apo Digitar N Lens w
El Nikkor APO 105mm f/5.6
and about to test a series of
Schneider Componon:
40mm f2.8 Apo Componon
45mm f4 Apo Componon
53mm f2.8 El-Nikkor
60mm f4 Apo Digitar/Apo Componon
80mm f4 Apo Digitar/Componon-S
80mm f4 M Componon
90mm f4.5 Apo Digitar/Apo Componon
90mm f4 Apo-Rodagon
OK... Now we are getting somewhere...
To start with It's important for you to understand that The XAct-2 & the Balpro you can use with a Nikon (or Canon, or other DSLR) only for (very high magnification) macro work... You'll have to purchase yourself an MFDB as to use the XAct for normal shift/tilt work and then use the recessed bellows for the wider lenses... You can use the X-Act2 or the Balpro for shooting to infinity only if you use the Sony α7 mirrorless with them and then
only if you modify the rear standard's mount as to save as much space as you can... (if you want more info on the matter, you may PM me) then, all 6X6 lenses (and larger than 6x6 medium format) on the market will work and most of the 6x4.5 lenses too (but just...)
The Apo digitars 60mm/4 and 80mm/4 M I have listed here...
http://forum.luminous-landscape.com/index.php?topic=110197.0 if you are interested... (I have revised my whole series of lenses as most of my work is with multishot MFDBs for Art reproduction of paintings and wall paintings and then interior and exterior architecture of monuments).
Now here is what my advise would be... First, I would advise you to change the Nikon for a Sony α7II (preferably the 24mp version IMO) as to use with the Actus... This would give you more than an inch of working distance for working space between the standards, but would increase the lens compatibility considerably too... Other than that, optical performance would increase too as the photons will have a considerably easier path as to "hit" the sensor...
As for lenses, I think you should avoid lenses aimed to work with tech cameras and an MFDB... You should consider those later on when you add an MFDB on your work... I will insist to suggest for you to use
enlarging lenses and then retrofocus designs that are aimed to work with mirrorbox DSLRs (of both FF and MF DSLR cameras) but of wider image circle than the one needed on the sensor you use..... Those would be the MF lenses like the ones mentioned earlier by others (and some more) and then (if you need a wider angle) some wider image circle lenses aimed for FF DSLRs (like the 24mm Tilt shift lenses are...) ...just my two cents out of my "little" (
) experience on the subject...
Note that the Actus is not a camera aimed for demanding work as its mainly designed to be as portable and easy to carry as possible (limited movements - no shifts in either diection on the front standard, no tilts or swings on the rear standard) aimed for walk around work and the XAct 2 isn't the best camera around as to "keep planes constant" if movements are combined, or for yaw free, or for distortionless operation... IMO (according to my "little" (
) experience)