This page summaries JAPB’s articles that are related to lenses, but are neither related to lens mounts or are lens reviews.
JAPB Series on lens defects
• Introduction:
• Part I: Oily blades [Pekka Buttler, May 2020]
• Part II: Fungus [Pekka Buttler, June 2020]
• Part III: Haze [Pekka Buttler, June 2020]
• Part IV: Element separation [Pekka Buttler, June 2020]
• Part V: Control ring malfunction [Pekka Buttler, June 2020]
• Part VI: Lens surface defects [Pekka Buttler, June 2020]
• Part VII: Dust & debris inside lens [Pekka Buttler, July 2020]
• Part VIII: Miscellaneous defects [Pekka Buttler, July 2020]
• The quick lens test [Pekka Buttler, September 2020]