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The 1936 VEF Minox Riga is a fascinating camera—the smallest of its time. Its crucial component is its lens: the Minostigmat.
For the past two years, I’ve been studying this specific lens. I began by conducting practical experiments and measurements using test photos.
Over the last five months, I’ve devoted all my efforts to understanding its design and the theory behind it. The breakthrough came in May, when I finally gained access to the manufacturing drawings.
This allowed me to calculate the optical properties myself—both its outstanding qualities as well as its only weak point. Finally it was a fascinating experience to work through the manual calculation of this Cooke triplet.
If you are wondering how such a lens is calculated—and what the work involved before the advent of computers—my report will interest you.:
Related links:
Here is my comparison between the Minostigmat (VEF Minox Riga) and the Complan (Minox A III):
moments-of-now.com
Here is the article about my search for the designer of the Minostigmat (it wasn't Walter Zapp):
For the past two years, I’ve been studying this specific lens. I began by conducting practical experiments and measurements using test photos.
Over the last five months, I’ve devoted all my efforts to understanding its design and the theory behind it. The breakthrough came in May, when I finally gained access to the manufacturing drawings.
This allowed me to calculate the optical properties myself—both its outstanding qualities as well as its only weak point. Finally it was a fascinating experience to work through the manual calculation of this Cooke triplet.
If you are wondering how such a lens is calculated—and what the work involved before the advent of computers—my report will interest you.:
Related links:
Here is my comparison between the Minostigmat (VEF Minox Riga) and the Complan (Minox A III):
Lens test: Minox Riga vs. Minox A III
How good does the Minox Riga lens perform compared to the Minox III (Minox A). Read the amazing results of this world-first test.
moments-of-now.com
Here is the article about my search for the designer of the Minostigmat (it wasn't Walter Zapp):