Went to one of my favorite Museums today, with the Nikkor-SC 5cm F1.5 and F1.4 (early) lenses. Took the M9 and M Monochrom- meaning I did 4 sets of pictures and got a lot of walking in today. I wanted a comparison between the two lenses. After going through color and monochrome images all evening, shot with the two lenses mostly wide-open and a couple stopped down to F4: I could not tell the two apart. My F1.4 lens is an early one, same optical formula as the 5005 series and "Tokyo" series. Marked "Japan", it still retains the earlier optical formula. Some time at the 33x run of F1.4 lenses, the formula was changed- all of the optics increased diameter and the fixtures also changed. The 1.5 lens, wide-open with the Space Shuttle. And everyone's favorite- the SR-71. This is the first time that I've taken the F1.5 Nikkor out on the M9. In a little closer, with the Monochrom: And the Bokeh goes Wild!