Shots mostly taken with a Carl Zeiss Jena 135/3.5 lens in M42 mount (with the electric contacts for full aperture automatic exposure on cameras such as the Praktica EE2). Some will be digital images from various DSLRs (Nikon, Pentax and Canon), others will be scans (Epson V500) of film stock used in a wide range of 35mm film cameras (Chinon, Nikon, Pentax, Praktica and probably more). There will also be some using its younger sister lens in Praktica Bayonet mount. Most photos taken with Nikon bodies will use a Kood M42 to Nikon adapter with optical correction to allow infinity focus. There will also be some test shots at closer range, taken with and without the optical adjuster, which will give a practical demonstration of the degradation which many pundits say is inevitable when using such an adapter.

You can't trust the EXIF for aperture - it will always be 3.5 for this lens - I'll try to put the shooting aperture in the captions, but don't count on it always being there and it will often be what I think I was probably using, rather than a contemporary record.