30.11.2025
This update briefly lists all the new articles/pages added to JAPB during the months of September–November of 2025. The list of new content is somewhat short due a death in the family (coinciding with what for me is the professionally busiest time of the year)
New Lens data sheets
- Canon AC 50 mm f/1.8
- Carl Zeiss Jena 40 mm f/4.5 Tessar (Exakta)
- Carl Zeiss Jena 65 mm f/2.8 Flektogon (Pentacon Six)
- Konica Varifocal Hexanon AR 35–100mm f/2.8
- Rodenstock Retina Eurygon 30 mm f/2.8 (DKL)
- Rodenstock Retina-Heligon 50 mm f/1.9 (DKL)
- Soligor C/D 35 mm f/2
- Tamron SP 90 mm f/2.5 Macro (Adaptall)
New theory articles
- Lens Mounts: Canon FL
- Lens Mounts: Canon FD
- Lens Mounts: Canon FDn
(JAPB used to treat these three mounts together. Now they’ve been split up and given a more detailed treatment) - Lens Mounts: Canon AC
New company profiles
Also, JAPB has during this time been working on an extensive revision of its well-appreciated article series on lens defects. Feel free to geek-out:
- Lens defects, introduction
- Lens defects, part I: Oily blades
- Lens defects, part II: Fungus
- Lens defects, part III: Haze
- Lens defects, part IV: (element) Separation
- Lens defects, part V: Control ring malfunction
- Lens defects, part VI: Surface defects
- Lens defects, part VII: Dust and debris (inside the lens)
- Lens defects, part VIII: Other miscellaneous defects