As interesting as the camera is, the original owner was more interesting. Fred Gerlach was born August 26, 1925 and died December 31, 2009. Fred Gerlach - Tribune Tributes.) As explained in his Obituary published January 7, 2010 in the San Diego Union-Tribune, he was a Detroit native, grew up in New York City and came to California in the late 1950s. He is most famous as a 12 string guitar player and maker. Fred Gerlach, Discography, Weenie ) Recordings are available at Smithsonian Folkways and
He knew the likes of Woodie Guthrie and was part of the New York folk scene in the early 1950s, and later part of the music scene in San Francisco and San Diego. (See, e.g., Fred Gerlach special - Blue Moment Arts, Obit: Fred Gerlach has Died, The Mudcat Cafe, R. Fred Gerlach was also amazingly talented in many other ways.
The original Canonflex is relatively rare and this was a great find. I purchased it for in La Mesa, CA in February 2011 from an ad on Craigslist.
I also bought a Canon 50mm f1.2 FL lens (my second) and a Canon 35mm FL lens, each for .
Princelle simply says that it's outside the scope of his book. So, all I have to work on in this review of the Leningrad-7 is my direct experience.
Without the glass, it is suited for indirect metering.
The difference is that with direct metering, you point the light meter at the light source instead of the subject, to obtain a direct value for light intensity.
I have no information about further continuation of the Leningrad series, but given the times, I don't think it's likely. The calculator dial displays speeds between 1/2000s and 30s, and aperture values between f/1.4 and f/22. For example, EV 1 means 1 s at f/1.4 with 100 ASA film, but it can also mean 30 s at f/8.
The EV system basically takes advantage of the inverse relationship between aperture and shutter speed, and follows the pseudomathematical formula EV = S/F (S is shutter speed, F is aperture).
The Leningrad-7 measures the intensity of the light in EV values, and the photographer can then shift around with shutter speed and aperture, within the given EV value, to obtain an acceptable combination.