Doug Kerr
Well-known member
Many incident light exposure meters, both electromechanical and electronic, have a light collector in the form of a translucent hemispherical dome, or something similar.
This construct has its roots in a development by Donald W. Norwood in the late 1930s. The story is a fascinating one, with many twists and turns.
The story, best I can reconstruct it, is told in considerable detail in my article on The Pumpkin, "Norwood’s dome: a revolution in
incident‑light photographic exposure metering".
I have just posted to The Pumpkin a revised issue of that article (as Issue 6). There is essentially no new nor substantially-changed information in this issue. It is primarily intended just to improve the presentation.
The article is indexed here on The Pumpkin:
Best regards,
Doug
This construct has its roots in a development by Donald W. Norwood in the late 1930s. The story is a fascinating one, with many twists and turns.
The story, best I can reconstruct it, is told in considerable detail in my article on The Pumpkin, "Norwood’s dome: a revolution in
incident‑light photographic exposure metering".
I have just posted to The Pumpkin a revised issue of that article (as Issue 6). There is essentially no new nor substantially-changed information in this issue. It is primarily intended just to improve the presentation.
The article is indexed here on The Pumpkin:
Best regards,
Doug
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