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March 2023 Update


We have not wanted to swamp the front page with a notice for every single page we’ve added, one might easily draw the wrong conclusion that very little is going on.

Au contraire, mon amis.

Below is a short list of every new content that’s been added to JAPB in March 2023. Besides new pages, some older pages have received updates, especially in the form of added and improved pictures of lenses.

Articles published in March 2023

Effective aperture
Lens Mounts: Four Thirds
Lens Mounts: L mount
Lens Mounts: Leica R
Lens Mounts: Micro Four Thirds

Data sheets published in March 2023

Carl Zeiss Jena Prakticar 80 mm f/1.8 MC
Carl Zeiss Jena Vario-Prakticar 35–70 mm f/2.7–3.5
Chinon Auto 55 mm f/1.4 (m42)
Chinon Auto Multi-Coated 55 mm f/1.7 (m42)
Feinmess Dresden Bonotar 105 mm f/4.5 (m42)
Nikkor F 200 mm f/4 (Nippon Kogaku Nikkor-Q)
Nikkor Ai 200 mm f/4
Nikkor F 300 mm f/4.5 (Nippon Kogaku Nikkor-H)
Porst Color Reflex Auto 55 mm f/1.2 (Pentax K)
Porst Color Reflex Auto 55 mm f/1.4 (m42)
Tokina AT-X 90 mm f/2.5 Macro

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