Hello notelliot
jstuedle gives a good, brief overview
* Compactness: the first impression one gets on handling is just how small it is
* Practicality: "Popphoto" Lab Test states ...
the SQF readings were excellent overall, among the best we've recorded for a lens of this type. There was slight pincushion distortion, measured at 0.55 percent. At the closest focusing distance of 17 ¼ inches (1:7.4 magnification) center sharpness was excellent at all apertures. Corner sharpness was very good at f/2.8, excellent from f/4 to f/16, and good at f/22. Optimum performance was at f/11.
*Price: The 45mm 2.8 P is somewhat a boutique lens, expensive and not very fast
The Doc asks if there's anything special about this lens optically:
After purchasing the matt black model in 2003 for my backup camera, Nikon's FM3A, i sold my fast Nikon 50mm lenses ... in my view their results could not compare
No regrets, albiet the loss of speed
Have fun!
e_