"Did you know thread" (A Photography Trivia Thread)

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zorkikat:
"edsel - August 15, 2005 04:35 AM (GMT)
Did you know the Macro lenses are nothing but Prime lenses with built-in Extension Tubes inside?! "

Not really. Macro lenses are optically corrected to resolve better or render better field flatness at close focus. Ordinary prime lenses are optimised to work at 'normal shooting distances'- that is, from infinity to about a meter. As they focus any closer, they tend to lose field flatness. A macro lens is required to render flat fields when working at extremely short distances.

One test to support this is to use an ordinary "prime" lens for enlarging. The projected image will tend to distort. A real macro lens will project flat, just like a real enlarger lens, which BTW, is a true "macro lens".

Jay

zorkikat:
...that the former USSR was the world's largest producer of cameras? They produced more cameras than any other country in the world. The first models of the Soviet Leica FED and Zorki clones were made in more numbers than all Leica cameras ever produced. The total number of Leica-inspired Soviet cameras numbered in the millions. The Soviets tried to improve on the original- and they did succeed in many ways.

...that the first 35mm SLR was made in the Soviet Union? The GOMZ (later to become "LOMO", the maker of the cult LOMO LKA camera) produced the "Sport" ("Спорт") in 1935, a year before the German Kine-Exakta was released.

...that the Kiev rangefinder camera was probably the camera whose design had the longest production run? The camera was based on the mid 1930s Contax II and III. The Soviets captured the Contax works after WWII and shipped its tools and machines as war reparation to the Ukrainian "Arsenal" camera factory where production continued under the "Kiev" badge. The camera hardly departed from the original 1935/36 German design. The Kiev was discontinued in the middle or late 1980s. That's an almost 60-year production run.

...that the so-called "Pentax screw mount"- aka M42 screw mount- should be, and more accurately, called as "Contax Screw Mount"? Contax developed this lens mount and introduced it in their "Contax-S" camera in 1949. It was the first pentaprism 35mm SLR. This Contax SLR was the basis of all 35mm SLRs which followed it- Nikon, Canon, Pentax and everyone else included. Because of political/economic issues, this Contax (made in East Germany) had to be renamed Pentacon (PENTAprism CONtax) to avoid run-ins with West German Carl Zeiss who legally owned the Contax name outside the Eastern Bloc.

Jay

testdrive:
did you that these aperture and shutter speed combinations
obtain the same exposure

f1,1/60sec = f1.4,1/30sec = f2,1/15sec = f2.8,1/8sec = f4,1/4sec = f5.6,1/2sec ;)

MelvinSevilla:
did you know that:

The number one magazine cover of the past 40 years in the USA, was an image taken by Annie Liebowitz for Rolling Stone of a naked John Lennon curled in a foetal position around a clothed Yoko Ono.

This picture, taken in a street in Saigon during the Vietnamese war, shows Genl. Loan shooting a Vietnamese prisoner. The picture is considered to be one of the five greatest pictures of the 20th Century that helped to change history.
It was taken by Eddie Adams (12/06/1933 â€“ 19/09/2004).

This photo, taken by Neil Leifer, is rated as one of the best sports pictures of the previous century. It shows Muhammed Ali standing over a floored Sonny Liston. The shot was taken in Maine, USA on 25th May 1965.

architer:
sorry but i can't help but give an OT reply.. melvin those are some very interesting facts. this is the first time i saw that john lennon and vietnam photo. thanks.

Heres my share:

did you know that...

-79 percent of professional photographers use digital cameras, which cost $8,000-$10,000.

-Thomas Wedgewood took the worlds first photograph in 1802 [Source: Uncle Johns Bathroom Reader]

-Princess Di was the most photographed woman in the world.If you took every picture taken of her and put them all together,you'd have a 36 year long movie,and it'd be a smash hit!
David Lexington from Los Angeles,CA

-[quote frm bloomberg.com] Goldman Sachs Group Inc. gave Chairman and Chief Executive Officer Lloyd Blankfein a $53.4 million bonus for 2006, setting a new high-water mark for Wall Street's top brass less than a week after Morgan Stanley paid John Mack a record $40 million.