📍 Irvine, CA
🗓️ December 12, 2025
📷 Sony a7iii, Zenit Helios 44M-6 58mm, 1/3200th, ISO 100

#photography #Firestick #nature #plant #plants #vintagelens #helios
📍 Irvine, CA
🗓️ December 30, 2024
📷 Sony a7iii, Zenit Helios 44M-6 58mm, 1/8000th, ISO 100

#photography #bloomscrolling #flower #flowers #daisy #Nature #plant #plants #vintagelens #helios

I need help to work out the aperture settings for a vintage lens, believed to be approx 1915. The lens is marked:

H Duplouich, Paris, Rectilicne Extra Rapid

That is all: no max aperture and no focal length (my guess for the latter is 100mm).

The aperture scale runs from 2 to 22 with equidistant segments. 2 is the smallest aperture, 22 is WIDE OPEN, so it is not related to an f-stop scale. I think it is the aperture diameter in mm.

An idea how to work out f-stops?

#vintagelens #vintagecamera

Stare long at the seagull, become mesmerised, go mad...

Olympus OM-D E-M10 | Carl Zeiss Jena Tessar 50mm f/2.8

#SilentSunday #MinimalistPhotography #BirdsOfMastodon #VintageLens #Tessar