I Don't Know What It Is I Don't Know What It Is "I Don't Know What It Is" is a song written and performed by Canadian-American singer-songwriter Rufus Wainwright. It was the first single from Wainwright's third studio album "Want One" and was released in a slim-line jewel case format on July 26, 2004. In addition to the UK and Japanese versions of "Want One", the song also appears on the bonus DVD that accompanies "Want Two" ("Rufus Wainwright: Live at the Fillmore"), "All I Want" (DVD), and "Want", a repackaged UK double album that contains "Want One" and "Want Two". In "All I Want", producer
Four Thirds system DSLRs. The smaller flange focal distance allows for more compact normal and wide angle lenses. It also facilitates the use, with an adapter, of lenses based on other mounting systems, including many manual focus lenses from the seventies and eighties. In particular, Four Thirds lenses can be used on Micro Four Thirds bodies with an adapter, however, "all of the functions of the Micro Four Thirds System may not always be available." Four Thirds system The Four Thirds System is a standard created by Olympus and Eastman Kodak for digital single-lens reflex camera (DSLR) and mirrorless camera design and development.