Just like the Voigtländer SL II 40/2 Ultron, the 90/3.5 is still available (or at least more common) in its newer form, with the all black barrel and supplied close-up lens (SL II). Although the SL and SL II are (apart from supplied close-up lens) to the best of my knowledge optically the same, my views in this post focus on the original SL series, silver/black barrel with R/G/B stripes.
It is a bit of an odd focal length and aperture combination, but the close focusing range (0.5m, 1:3.5 max mag factor) and fingerprint suggests Cosina made this one for the hanami shooters - very nice bokeh and sharp at all apertures. Like all the SL series lenses (also applies to SL II), they're all metal and have fine tolerances. Sharpness wide open is only barely less than stopped down, being good all the time. Less importantly, they're all very handsome and certainly match the proper look of say a Nikon Df or FM2 camera body
It goes for about 400-500 EUR on eBay, which is OK given the technical quality it delivers. As mentioned, f/3.5 and 90mm isn't the most appealing combination for a full-frame DSLR, but you shouldn't give that too much thought. Very little if any geometric distortion, low vignetting and best detail at the two widest apertures, it actually draws less detail stopped down to f/8 or smaller. It is however not a true achromatic design, as it will show lateral color fringing if you really want to call upon it.
The black & whites are Ilford Delta 400 on an FM2n, hardly processed at all and scanned years ago when Nikon still gave software support for their scanners.
