2. yes, LOMO can refer to either a style or a camera called LOMO.

3. LOMO originally referred to cameras produced by Leningrad Optical Factory, such as smena 8M and LC-A, but later closed down. Now the owner of the LOMO trademark is lomography, and a series of "LOMO official" cameras have been launched, such as Diana, Sardines, Xiaobai, fisheye, LC-A+ and so on, all of which are film cameras.

broadly speaking, lomo is now a culture. That is, it can refer to the style of a photo: for example, it has the characteristics of color cast, dark corner, glare and high saturation. It can also refer to an attitude towards life: being casual, freehand, happy, advocating freedom, breaking the rules, and sometimes taking a decadent, confused or cynical attitude.

so in a narrow sense, LOMO cameras are just some of the film cameras mentioned above. But broadly speaking, LOMO camera can be any other camera, including other brands of film cameras, mobile phones, digital cameras and SLR.