New life for old targets

This adapter allowed me to use some old Russian targets on my Nikon 1 J2.
As goals with fixed focus, they are brighter than the current zooms. For example, a 11-A Tair telephoto focal length 135mm 2.8 open.
Of course, use the manual settings, focus and diaphragm and are given by the objective (ie for M42 lenses that do not have the manual diaphragm it will be fully open).

The equivalent focal length is higher than what is written on the telephoto (valid for 24x36 mm format).

It allows adjustment to infinity, actually just put infinity on the old goal and focus is good for distant objects.

The only downside: the objectives can be heavy and I find that fixing the Nikon 1 is not strong enough. So to be perfect, this adapter should have a tripod screw for not using the camera.