rxmd
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You could get a short mount helicoid for visoflex and adapt it to Nikon SLR easily. That way you could use the older 90 Elmarit and Elmar, 135 Elmar and Hektor, and the longer superb visoflex lens heads.
Not cheap though, the Visoflex adapter for the Nikon is $220 alone, and then you still don't have any helicoids or lenses.
If you don't mind getting dirty, you could find something like a Helios-44 in M42 mount then have the base of the flange turned down by a machinist about 3mm then add a Nikon flange from an old broken Nikon lens. You'll have a fantastic 85mm f/1.5.
You probably mean the Helios-40; the Helios-44 would be a generic 58/f2 lens. I've used my 85/f1.5 Helios-40 on the Nikon F2AS with a plain glassless M42 adapter; you don't get infinity focus, but for portraits you don't need it anyway. Takes good pictures.
That said, the Helios-40 is no longer a bargain lens, largely because of its speed. On eBay they are in the $400-$500 range at least. I would not buy one of those only to have it turned down by a machinist.
In short, the Nikon system just isn't very good for adapting lenses. Either you adapt medium format lenses which will be big and heavy and not all that optimized for detail; or you adapt Leica R lenses which forces you to convert every lens; or you specially buy interchangeable mount lenses, which end up just like any third party lens and often not very good; or you resort to hacksaw-type solutions.