That looks like my Jupiter 8!We've veered a bit from comparing the J-3+ with three rare Sonnars, BUT- this seems to be a good place to put in the Jupiter-8 shots from a lower-cost Sonnar.
This one is now in the hands of a Leicaplace member... It is Specially Modified for 0.65m close-focus, and is in focus across the range.
L1016243 by fiftyonepointsix, on Flickr
L1016254 by fiftyonepointsix, on Flickr
Both at F2.
And F2 on the M Monochrom with a Yellow filter.
G1005267 by fiftyonepointsix, on Flickr
G1005240 by fiftyonepointsix, on Flickr
Processed using my Custom FORTRAN code for applying a Gamma curve and converting to 16-bit pixel values.
This lens took a lot of work, ie shortening the focal length and modifying the mount. I bought another Jupiter-8, cannot modify it for close-focus, but it is made in 1957. Like me.