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The Canon EF 75–300mm f / 4–5.6 III lens. Introduced in 1991, the Canon EF 75–300mm f / 4–5.6 lens is a telephoto zoom lens for Canon EOS single-lens reflex cameras with an EF lens mount. There are 3 basic types of the lens: the IS USM (Image Stabilization, Ultra Sonic Motor), the USM (USM, no IS) and non-USM (no USM, no IS).
Launched on April 17, 1967, Surveyor 3 landed on April 20, 1967, at the Mare Cognitum portion of the Oceanus Procellarum (S3° 01' 41.43" W23° 27' 29.55"), in a small crater that was subsequently named Surveyor. It transmitted 6,315 TV images to the Earth, including the first images to show what planet Earth looked like from the Moon's surface.
Since the Apollo Program, there has been at least one independent investigation into the validity of the NASA claim. Leonard D. Jaffe, a Surveyor program scientist and custodian of the Surveyor 3 parts brought back from the Moon, stated in a letter to the Planetary Society that a member of his staff reported that a "breach of sterile procedure" took place at just the right time to produce a ...
The initial A–G [11][14] list was expanded to include later mission types: [1]: 466 H-type missions—Apollo 12, 13 (planned) and 14—would perform precision landings, and J-type missions—Apollo 15, 16 and 17—would perform thorough scientific investigation. The I-type objective, which called for extended lunar orbital surveillance of the ...
After a boost of 6.8 miles (10.9 km) by Skylab 4's Apollo CSM before its departure in 1974, Skylab was left in a parking orbit of 269 miles (433 km) by 283 miles (455 km) [107] that was expected to last until at least the early 1980s, based on estimates of the 11-year sunspot cycle that began in 1976.
Apollo 13 stands as one of NASA's most monumental and near-fatal space missions decades after the event. Launched in 1970, what was meant to be the third moon landing became a desperate fight for ...
The EF 35-80mm f/4-5.6 USM lens is a family of EF mount wide -to- normal zoom lenses manufactured and sold by Canon. There were five versions made. One contained a piezoelectric motor, three contained a micro motor, and one contained a USM motor.
44 mm. The EF lens mount is the standard lens mount on the Canon EOS family of SLR film and digital cameras. EF stands for "Electro-Focus": automatic focusing on EF lenses is handled by a dedicated electric motor built into the lens. Mechanically, it is a bayonet-style mount, and all communication between camera and lens takes place through ...