I don't know that you will see an Industar 22 tested with the other two, but if you search Sonnar I am sure you will find comments about the J3 and Canon together. If you get a good sample, well adjusted J3 (assuming you want to shoot it on Leica stuff not FSU stuff) it can be a great bargain lens. It has an aluminum barrel, not of the quality of the Canon. Not even close honestly. But optically it can be very good.