Another Takumar hits my blog :)
Many models of this lens have been produced. This lens is a Super-Multi-Coated Takumar, the last version produced.
Aperture range: f/3.5-f/16
Minimum distance focussing: 45cm
Aperture blades: 5
This lens has a good reputation but its maximum aperture (f/3.5) limits its use somewhat. On the NEX-5 it has a FoV of about 50mm.
I use the following dedicated ARG-file with exiftool: smctak35f35.txt
-EXIF:LensModel=Super-Multi-Coated Takumar 35mm f/3.5 (M42)
This works well with LR4 and NEX-5 RAW-files.